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Pyrolysis Kinetics of Byrsonima crassifolia Stone as Agro-Industrial Waste through Isoconversional Models. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020544. [PMID: 36677602 PMCID: PMC9862415 DOI: 10.3390/molecules28020544] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/16/2022] [Accepted: 12/18/2022] [Indexed: 01/08/2023]
Abstract
This study is aimed at the analysis of the pyrolysis kinetics of Nanche stone BSC (Byrsonima crassifolia) as an agro-industrial waste using non-isothermal thermogravimetric experiments by determination of triplet kinetics; apparent activation energy, pre-exponential factor, and reaction model, as well as thermodynamic parameters to gather the required fundamental information for the design, construction, and operation of a pilot-scale reactor for the pyrolysis this lignocellulosic residue. Results indicate a biomass of low moisture and ash content and a high volatile matter content (≥70%), making BCS a potential candidate for obtaining various bioenergy products. Average apparent activation energies obtained from different methods (KAS, FWO and SK) were consistent in value (~123.8 kJ/mol). The pre-exponential factor from the Kissinger method ranged from 105 to 1014 min-1 for the highest pyrolytic activity stage, indicating a high-temperature reactive system. The thermodynamic parameters revealed a small difference between EA and ∆H (5.2 kJ/mol), which favors the pyrolysis reaction and indicates the feasibility of the energetic process. According to the analysis of the reaction models (master plot method), the pyrolytic degradation was dominated by a decreasing reaction order as a function of the degree of conversion. Moreover, BCS has a relatively high calorific value (14.9 MJ/kg) and a relatively low average apparent activation energy (122.7 kJ/mol) from the Starink method, which makes this biomass very suitable to be exploited for value-added energy production.
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Ma C, Zhang F, Liu H, Wang H, Hu J. Thermogravimetric pyrolysis kinetics study of tobacco stem via multicomponent kinetic modeling, Asym2sig deconvolution and combined kinetics. BIORESOURCE TECHNOLOGY 2022; 360:127539. [PMID: 35777640 DOI: 10.1016/j.biortech.2022.127539] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/24/2022] [Accepted: 06/26/2022] [Indexed: 06/15/2023]
Abstract
Tobacco stems (TS) are tobacco residues produced, whereby the assessment of the pyrolysis kinetics of TS is critical to realize high-value utilization of agricultural residues. Firstly, a thermogravimetric analyzer was employed to perform the non-isothermal pyrolysis of TS at various heating rates. Then, the deconvolution function by Asym2sig showed that the pyrolysis of TS can be accurately modeled for three parallel decomposition fractions. Furthermore, the pyrolysis product was analyzed using fourier transform infrared spectrometer (FTIR). The results showed that the average activation energy evaluated by the isoconversion methods exhibited the highest average activation energy of 191.762 kJ·mol-1 for lignin (LG), followed by 189.268 kJ·mol-1 for cellulose (CL) and then 176.357 kJ·mol-1 for hemicellulose (HC). Based on the experimental results, the pre-exponential factors and reaction models for HC, CL and LG were also calculated and developed separately. From thermodynamic standpoint, raw materials for bioenergy generation can be derived from TS.
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Affiliation(s)
- Chaowei Ma
- Engineering Research Center of the Ministry of Education for Metallurgical Energy Conservation and Emission Reduction, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China
| | - Fengxia Zhang
- Engineering Research Center of the Ministry of Education for Metallurgical Energy Conservation and Emission Reduction, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China; Kunming Metallurgy College, 650033 Kunming, PR China
| | - Huili Liu
- Engineering Research Center of the Ministry of Education for Metallurgical Energy Conservation and Emission Reduction, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China
| | - Hua Wang
- Engineering Research Center of the Ministry of Education for Metallurgical Energy Conservation and Emission Reduction, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China
| | - Jianhang Hu
- Engineering Research Center of the Ministry of Education for Metallurgical Energy Conservation and Emission Reduction, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China.
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3
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Cui B, Chen Z, Guo D, Liu Y. Investigations on the pyrolysis of microalgal-bacterial granular sludge: Products, kinetics, and potential mechanisms. BIORESOURCE TECHNOLOGY 2022; 349:126328. [PMID: 34780909 DOI: 10.1016/j.biortech.2021.126328] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/03/2021] [Accepted: 11/09/2021] [Indexed: 06/13/2023]
Abstract
This study investigated the pyrolysis of microalgal-bacterial granular sludge for producing bio-oil and biochar. Results showed that the bio-oil productivity of pyrolyzed MBGS reached 39.5-45.4 wt%, while 23.8-41.2% for the nitrogen-containing bio-oil at the temperature of 673-1073 K. Meanwhile the biochar with a nitrogen content of 3.7-7.0 wt% could also be produced. Moreover, the Van-Krevelen diagram revealed that produced bio-oil had a H/C ratio higher than that from agroforestry biomass, but its O/C ratio was found to be similar to those of coal and biochar. It further appeared from a mass conservation analysis that the highest bio-oil production yield was achieved at a pyrolysis temperature of 773 K, while the pyrolytic kinetics of MBGS in the temperature range studied was governed by the 3-D diffusion mechanism with the activation energy of 224.96 kJ·mol-1.
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Affiliation(s)
- Baihui Cui
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhihua Chen
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Xinxiang 453007, China
| | - Dabin Guo
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore
| | - Yu Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore.
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Chen F, Zhang F, Yang S, Liu H, Wang H, Hu J. Investigation of non-isothermal pyrolysis kinetics of waste industrial hemp stem by three-parallel-reaction model. BIORESOURCE TECHNOLOGY 2022; 347:126402. [PMID: 34826563 DOI: 10.1016/j.biortech.2021.126402] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/17/2021] [Accepted: 11/18/2021] [Indexed: 06/13/2023]
Abstract
The evaluation of pyrolysis kinetics for waste industrial hemp stem (IHS) is essential to achieve the high-value utilization of agricultural waste. In present study, firstly, non-isothermal pyrolysis experiments of IHS were performed at different heating rates using a thermogravimetric analyzer. Then, the kinetic triplets (apparent activation energy, pre-exponential factor, and reaction mechanism) of the three pseudo components for IHS (hemicellulose, cellulose, and lignin) were determined by a three-parallel-reaction model. Moreover, the pyrolysis products were also characterized via FTIR and SEM. The results showed that the apparent activation energies of hemicellulose, cellulose and lignin were 86.523, 113.257 and 197.961 kJ/mol, respectively; the pre-exponential factors were 6.887 × 107, 8.179 × 109 and 1.801 × 1015 s-1, respectively; and the reaction mechanism functions were f(α) = α1.35629(1-α)0.34832[-ln(1-α)]-1.20128, f(α) = α3.42900(1-α)0.01288[-ln(1-α)]-2.84445, f(α) = α0.68738(1-α)3.09313[-ln(1-α)]-1.58522, respectively. The release temperature for volatile products of IHS pyrolysis was mainly between 440 and 840 K. IHS as an agricultural waste is a suitable feedstock to produce renewable energy.
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Affiliation(s)
- Fangjun Chen
- Engineering Research of Metallurgy Energy Conservation & Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China
| | - Fengxia Zhang
- Engineering Research of Metallurgy Energy Conservation & Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China; Kunming Metallurgy College, 650033 Kunming, PR China
| | - Shiliang Yang
- Engineering Research of Metallurgy Energy Conservation & Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China
| | - Huili Liu
- Engineering Research of Metallurgy Energy Conservation & Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China
| | - Hua Wang
- Engineering Research of Metallurgy Energy Conservation & Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China
| | - Jianhang Hu
- Engineering Research of Metallurgy Energy Conservation & Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China.
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Kristanto J, Azis MM, Purwono S. Multi-distribution activation energy model on slow pyrolysis of cellulose and lignin in TGA/DSC. Heliyon 2021; 7:e07669. [PMID: 34386629 PMCID: PMC8346647 DOI: 10.1016/j.heliyon.2021.e07669] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/23/2021] [Accepted: 07/23/2021] [Indexed: 11/30/2022] Open
Abstract
Developing a kinetic model to analyze the multi-step reaction of biomass pyrolysis is pivotal to elucidate the mechanism of the pyrolysis. For this purpose, a model-fitting method such as multi-distribution the Distributed Activation Energy Model (DAEM) is one of the most reliable methods. DAEM with 4 different distribution functions of Gaussian, Logarithmic, Gumbel, and Cauchy was utilized to characterize the pyrolysis of cellulose and lignin during Thermogravimetric Analysis/Differential Scanning Calorimetry (TGA/DSC) instrumentation. By comparing Derivative Thermogravimetry (DTG) and DSC profiles, determination of pseudo-components can be done more accurately. A kinetics analysis on the pyrolysis of cellulose with a single Gaussian distribution DAEM yielded a single activation energy of 178 kJ mol−1 with a narrow standard deviation. This result was justified by a single and dominant endothermic peak followed by minor exothermic peaks in the DSC result. For lignin pyrolysis, the presence of multiple peaks is characterized by four pseudo-components in DAEM with activation energies of 157, 174, 194, and 200 kJ mol−1. These pseudo-components were confirmed by the DSC result which indicated the occurrences of two exothermic peaks with two lesser exothermic or possibly endothermic peaks at the same temperature range. These findings imply the importance of DSC to support a kinetics study of thermogravimetric pyrolysis.
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Affiliation(s)
- Jonas Kristanto
- Department of Chemical Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia
| | - Muhammad Mufti Azis
- Department of Chemical Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia
| | - Suryo Purwono
- Department of Chemical Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia.,Professional Engineering Program, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia
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Hu J, Li Y, Xiao F, Zhang Y, He J, Yang R. Thermal degradation and aging behavior of polytriazole polyethylene oxide‐tetrahydrofuran elastomer based on click‐chemistry. J Appl Polym Sci 2020. [DOI: 10.1002/app.48974] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jinghui Hu
- School of Materials Science & EngineeringBeijing Institute of Technology Haidian District Beijing China
| | - Ying Li
- School of Materials Science & EngineeringBeijing Institute of Technology Haidian District Beijing China
| | - Fei Xiao
- School of Materials Science & EngineeringBeijing Institute of Technology Haidian District Beijing China
| | - Yongli Zhang
- Xi'an North Huian Chemical Industries Co., Ltd Xi'an China
| | - Jiyu He
- School of Materials Science & EngineeringBeijing Institute of Technology Haidian District Beijing China
| | - Rongjie Yang
- School of Materials Science & EngineeringBeijing Institute of Technology Haidian District Beijing China
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Non-isothermal kinetic study of fodder radish seed cake pyrolysis: performance of model-free and model-fitting methods. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2020. [DOI: 10.1007/s43153-020-00023-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Liu C, Duan X, Chen Q, Chao C, Lu Z, Lai Q, Megharaj M. Investigations on pyrolysis of microalgae Diplosphaera sp. MM1 by TG-FTIR and Py-GC/MS: Products and kinetics. BIORESOURCE TECHNOLOGY 2019; 294:122126. [PMID: 31521981 DOI: 10.1016/j.biortech.2019.122126] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 09/01/2019] [Accepted: 09/04/2019] [Indexed: 06/10/2023]
Abstract
In this work, pyrolysis characteristics and kinetics of microalgae Diplosphaera sp. MM1 cultivated in different mediums were investigated by TG-FTIR and Py-GC/MS. Harvested MM1s biomass varied with the changing in proximate and ultimate analyses presented different weight loss behaviors. The weight loss of MM1s cultivated in dairy and winery wastewater in main pyrolysis region was ~48.4 wt% and ~52.9 wt%, respectively, and both showed secondary weight loss after 570 °C. However, MM1 harvested from BG-11 medium exhibited maximum weight loss of ~63.5 wt% and no secondary weight loss. Further, the activation energies of MM1s harvested from dairy and winery wastewater (176.3 kJ/mol and 130.4 kJ/mol, respectively) were lower than that of BG-11medium (189.4 kJ/mol). The best mechanism function for MM1s pyrolysis was third-order f(α) = (1-α)3. Py-GC/MS results of MM1 cultivated in winery wastewater showed highest contents of C4-C10 and C11-C21 that characterized the carbon level of gasoline and diesel, respectively, which are the major components of bio-oils.
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Affiliation(s)
- Cuixia Liu
- School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China; Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Xuejun Duan
- School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Qishi Chen
- School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Cong Chao
- School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Zhenghao Lu
- School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Qingji Lai
- School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Mallavarapu Megharaj
- Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), University of Newcastle, Callaghan, NSW 2308, Australia
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Li X, Lin S, Hao T, Khanal SK, Chen G. Elucidating pyrolysis behaviour of activated sludge in granular and flocculent form: Reaction kinetics and mechanism. WATER RESEARCH 2019; 162:409-419. [PMID: 31299428 DOI: 10.1016/j.watres.2019.06.074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 06/06/2019] [Accepted: 06/30/2019] [Indexed: 06/10/2023]
Abstract
The pyrolysis kinetics of sewage sludge was studied to determine the constituent of sludge and explore the feasibility of pyrolytic post-treatment. Both flocculent sludge and granular sludge were pyrolysed in a thermogravimetric analyser under inert atmospheric conditions. The pyrolysis of granular sludge and flocculent sludge were described by three parallel reactions model with three individual pseudo-components. The decomposition activation energy values of the three pseudo-components were determined by iso-conversional methods to be 263.97 kJ/mol, 257.18 kJ/mol and 153.61 kJ/mol in flocculent sludge and 139.89 kJ/mol, 228.78 kJ/mol and 142.78 kJ/mol in granular sludge, respectively. Granular sludge exhibited better thermal stability but lower devolatilisation activation energy than flocculent sludge, which could be attributed by enriched alkali and alkaline metals during granulation. Master plots of experimental data sets suggested that the decomposition of all organic pseudo-components of flocculent sludge followed the nth-order mechanism while the pyrolytic mechanism of the first organic fraction in granular sludge coincided with random nucleation and nuclei growth. By investigating the pyrolytic behaviour, this study sheds light on the composition of granular sludge and the impact of sludge components on granular sludge pyrolysis, and lays the foundation for the treatment of waste granular sludge with potential for resource and energy recovery in the near future.
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Affiliation(s)
- Xiling Li
- Department of Civil & Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Sen Lin
- Department of Civil & Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Tianwei Hao
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, China; Department of Civil & Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China.
| | - Samir Kumar Khanal
- Department of Molecular Biosciences and Bioengineering, University of Hawai᾽i at Mānoa, 1995 East-West Road, Honolulu, HI, 96822, USA
| | - Guanghao Chen
- Department of Civil & Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China; Water Technology Center, The Hong Kong University of Science and Technology, Hong Kong, China; Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science and Technology, Hong Kong, China; Wastewater Treatment Laboratory, FYT Graduate School, The Hong Kong University of Science and Technology, Nansha, Guangzhou, China
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10
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Parametrization of a Modified Friedman Kinetic Method to Assess Vine Wood Pyrolysis Using Thermogravimetric Analysis. ENERGIES 2019. [DOI: 10.3390/en12132599] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Common kinetic parameters were obtained for leached and non-leached samples of vine wood biomass. Both samples were considered to have different proportions of cellulose, hemicellulose, and lignin compositions as a result of the leaching process. The two samples were analyzed in terms of pyrolysis kinetic parameters using non-isothermal thermogravimetric analysis. Furthermore, the classic Friedman isoconversional method, a deconvolution procedure using the Fraser–Suzuki function, and a modified Friedman method from a previous study on the delay in conversion degree were satisfactorily applied. The observed difference when the deconvolution technique was applied suggests that the classic Friedman method is not adequate for studying the pyrolysis of individual vine wood biomass components. However, this issue was solved by studying the delay in conversion degree of both biomasses and calculating the kinetic parameters using the resulting information. This procedure was found to be useful for studying and comparing the kinetics of heterogeneous biomasses and has a sound scientific explanation, making this research a basis for future similar studies.
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Zhang X, Fu W, Yin Y, Chen Z, Qiu R, Simonnot MO, Wang X. Adsorption-reduction removal of Cr(VI) by tobacco petiole pyrolytic biochar: Batch experiment, kinetic and mechanism studies. BIORESOURCE TECHNOLOGY 2018; 268:149-157. [PMID: 30077171 DOI: 10.1016/j.biortech.2018.07.125] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 07/24/2018] [Accepted: 07/25/2018] [Indexed: 05/20/2023]
Abstract
Tobacco petiole biochar (TPBC) was prepared via pyrolysis and used for Cr(VI) removal. Cr(VI) removal efficiency was reduced by pyrolytic temperature (PyT) increase which mainly affected by functional groups rather than specific surface area. According to the optimal pseudo second-order kinetic, the initial adsorption rate was decreased with PyT increase from 355.91 mg·g-1·min-1 (PyT = 300 °C) to 3.44 mg·g-1·min-1 (PyT = 700 °C). The isotherm was optimally explained by Temkin model involved physical absorption with heat of 28.73 J/mol. Simulation result of adsorption-reduction-adsorption process showed the Cr(VI) removal was kinetic controlled by Cr(VI) and Cr(III) adsorptions. TPBC300 was the optimal TPBC for chromium removal from electroplating wastewater with efficiencies of: 66.7% (Cr(VI)) and 21.1% (Cr(tot)).
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Affiliation(s)
- Xin Zhang
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control. Xinxiang 453007, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, China
| | - Weijing Fu
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control. Xinxiang 453007, China
| | - Yuanxue Yin
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control. Xinxiang 453007, China
| | - Zhihua Chen
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control. Xinxiang 453007, China
| | - Rongliang Qiu
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, China
| | | | - Xuefeng Wang
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control. Xinxiang 453007, China.
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Wu X, Ba Y, Wang X, Niu M, Fang K. Evolved gas analysis and slow pyrolysis mechanism of bamboo by thermogravimetric analysis, Fourier transform infrared spectroscopy and gas chromatography-mass spectrometry. BIORESOURCE TECHNOLOGY 2018; 266:407-412. [PMID: 29982064 DOI: 10.1016/j.biortech.2018.07.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 06/30/2018] [Accepted: 07/02/2018] [Indexed: 06/08/2023]
Abstract
Slow pyrolysis of bamboo is an important conversion pathway to produce biofuels and chemicals such as biomass-derived fertilizer precursor (biochar). In this study, evolved gas analysis during pyrolysis of bamboo was conducted by a combination of TG, FTIR and GC-MS to establish a detailed pyrolysis mechanism of bamboo biomass. The main decomposition temperature zones were 300-400 °C and it reached the maximum mass loss intensity at 350 °C based on DTG curves. The main functional groups escaped from biomass during pyrolysis were -OH, -CH2, -CH3, CO, C-O, and -COOH. The main compounds during pyrolysis of bamboo were acetic acid and 2-propenoic acid, ethenyl ester at 300 °C, 2-oxo-propanoic acid and 1-hydroxy-2-propanone at 350 °C and acetic acid and acetic acid ethenyl ester at 400 °C. Evolved gas analysis indicated that components in bamboo occurred in different temperatures and pyrolysis mechanisms and resulted in distinguishing pyrolysis product emission characteristics.
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Affiliation(s)
- Xiaofei Wu
- Institute of Energy Conservation and Low Carbon Technology, Shenwu Technology Group Corp, Shenniu Road 18, Changping District, Beijing, PR China; School of Chemical Engineering, China University of Petroleum, Beijing, PR China
| | - Yuxin Ba
- Institute of Energy Conservation and Low Carbon Technology, Shenwu Technology Group Corp, Shenniu Road 18, Changping District, Beijing, PR China
| | - Xin Wang
- Institute of Energy Conservation and Low Carbon Technology, Shenwu Technology Group Corp, Shenniu Road 18, Changping District, Beijing, PR China.
| | - Mingjie Niu
- Institute of Energy Conservation and Low Carbon Technology, Shenwu Technology Group Corp, Shenniu Road 18, Changping District, Beijing, PR China
| | - Kai Fang
- Institute of Energy Conservation and Low Carbon Technology, Shenwu Technology Group Corp, Shenniu Road 18, Changping District, Beijing, PR China
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Domínguez MT, Madejón P, Madejón E, Diaz MJ. Novel energy crops for Mediterranean contaminated lands: Valorization of Dittrichia viscosa and Silybum marianum biomass by pyrolysis. CHEMOSPHERE 2017; 186:968-976. [PMID: 28835005 DOI: 10.1016/j.chemosphere.2017.08.063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 07/30/2017] [Accepted: 08/12/2017] [Indexed: 06/07/2023]
Abstract
Establishing energy crops could be a cost-efficient alternative towards the valorization of the plant biomass produced in contaminated lands, where they would not compete with food production for land use. Dittrichia viscosa and Silybum marianum are two native Mediterranean species recently identified as potential energy crops for degraded lands. Here, we present the first characterization of the decomposition of the biomass of these species during thermo-chemical conversion (pyrolysis). Using a greenhouse study we evaluated whether the quality of D. viscosa and S. marianum biomass for energy production through pyrolysis could be substantially influenced by the presence of high concentrations of soluble trace element concentrations in the growing substrate. For each species, biomass produced in two different soil types (with contrasted trace element concentrations and pH) had similar elemental composition. Behavior during thermal decomposition, activation energies and concentrations of pyrolysis gases were also similar between both types of soils. Average activation energy values were 295 and 300 kJ mol-1 (for a conversion value of α = 0.5) for S. marianum and D. viscosa, respectively. Results suggest that there were no major effects of soil growing conditions on the properties of the biomass as raw material for pyrolysis, and confirm the interest of these species as energy crops for Mediterranean contaminated lands.
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Affiliation(s)
- María T Domínguez
- Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), 10 Reina Mercedes Av., 41012 Seville, Spain; Departamento de Cristalografía, Mineralogía y Química Agrícola, Universidad de Sevilla, 1 Prof. García González St., 41012 Seville, Spain.
| | - Paula Madejón
- Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), 10 Reina Mercedes Av., 41012 Seville, Spain
| | - Engracia Madejón
- Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), 10 Reina Mercedes Av., 41012 Seville, Spain
| | - Manuel J Diaz
- PRO2TECS, Department of Chemical Engineering, Huelva University, 21071 Huelva, Spain
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