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Moafor SN, Tsobnang PK, Oyedotun KO, Lontio Fomekong R, Kabongo GL, Lebohang M, Lambi JN, Jewell LL. Effect of SiO 2/Al 2O 3 ratio on the electrochemical performance of amorphous zeolite loaded with cobalt oxide grown via steam-assisted crystallization method. RSC Adv 2023; 13:21393-21402. [PMID: 37465578 PMCID: PMC10350639 DOI: 10.1039/d3ra03268j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/08/2023] [Indexed: 07/20/2023] Open
Abstract
Improving the performance of a supercapacitor is one of the main approaches to solve the energy shortage problem. Electrode material is one of the key components limiting the efficiency of a supercapacitor. Discovering, tuning, and improving electrode materials are very important. This work reports the effect of SiO2/Al2O3 ratio on electrochemical performances of amorphous zeolites ZSM5 (AZ) and H-ZSM5 (H-AZ) loaded with cobalt oxide. Two SiO2/Al2O3 ratios (1 = 6.2 and 2 = 8.3) of AZ1, AZ2 and H-AZ1, H-AZ2 were synthesized by a facile impregnation method. Then, controlled masses of cobalt oxide were introduced to enhance the supercapacitive performances of the amorphous zeolite. Investigation of the SiO2/Al2O3 ratio in the cobalt oxide/zeolite composite (Co/AZ and Co/H-AZ) was carried out to unveil its effect on the electrochemical properties. Worthy of note is the fact that the resulting electrode materials exhibited supercapacitive behavior that is effective over a potential window ranging from 0 to 0.5 V in potassium hydroxide (1 M KOH) aqueous electrolyte. Results from Galvanometry Charging and Discharging (GCD) analyses show that the modified Ni-foam electrodes loaded with Co/H-AZ1 and Co/H-AZ2 are capable of delivering a relatively high specific capacity from 45.97 mA h g-1 to a high value of 72.5 mA h g-1 at 1 A g-1 and Ni-foam electrodes loaded with Co/AZ1 and Co/AZ2 exhibited values from 26 mA h g-1 to 52.83 mA h g-1 respectively. It is clearly shown that, when the mass ratio SiO2/Al2O3 increases, the specific capacity increases as well. It was also noticed that after 2000 cycles, Co/H-AZ1 and Co/AZ1 have a poor coulombic efficiency while Co/H-AZ2 and Co/AZ2 exhibited 98% for coulombic efficiency. Finally, this study shows that to fabricate high performance supercapacitors with amorphous zeolite loaded with cobalt oxide, one should keep the ratio of SiO2/Al2O3 as high as possible during synthesis.
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Affiliation(s)
- Saureille Ngouana Moafor
- Department of Chemical Engineering, University of South Africa (UNISA) Christiaan De Wet & Pioneer Avenue Florida 1710 South Africa
- Laboratory of Material Chemistry, Department of Inorganic Chemistry, University of Yaoundé I (UYI) P. O. Box 812 Yaoundé Cameroon
| | - Patrice Kenfack Tsobnang
- Laboratory of Solid State and Molecular Inorganic Chemistry, Department of Chemistry, University of Dschang Cameroon
| | - Kabir Oyeniran Oyedotun
- College of Science, Engineering and Technology (CSET), University of South Africa Florida Campus Johannesburg 1710 South Africa
| | - Roussin Lontio Fomekong
- Laboratory of Material Chemistry, Department of Inorganic Chemistry, University of Yaoundé I (UYI) P. O. Box 812 Yaoundé Cameroon
| | - Guy L Kabongo
- Department of Physics, College of Science, Engineering and Technology, University of South Africa Johannesburg 1710 South Africa
| | - Macheli Lebohang
- Department of Chemical Engineering, University of South Africa (UNISA) Christiaan De Wet & Pioneer Avenue Florida 1710 South Africa
| | - John Ngolui Lambi
- Laboratory of Material Chemistry, Department of Inorganic Chemistry, University of Yaoundé I (UYI) P. O. Box 812 Yaoundé Cameroon
| | - Linda L Jewell
- Department of Chemical Engineering, University of South Africa (UNISA) Christiaan De Wet & Pioneer Avenue Florida 1710 South Africa
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Sadjadi S, Tarighi S, Afshar Ebrahimi A. Novel composites of ZSM-5 and MOF as potent acidic catalysts: study of the role of zeolite characteristics in the catalytic activity. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Singh V, Arumugam S, Tathod AP, Nagabhatla V. Conversion of bio-derived crude glycerol into renewable high-octane gasoline-stock. Chem Commun (Camb) 2022; 58:4873-4876. [PMID: 35352718 DOI: 10.1039/d2cc01449a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here, we report an efficient catalytic process that operates on a bi-metallic ZSM-5 supported catalyst (0.1Ga-1Zn/ZSM-5) for 100% carbon conversion of glycerol to produce 71.4C% liquid fuel-stock possessing a high concentration of alkyl-aromatics and octane potential (>97 RON) for fuel applications, achieved and reported for the first time to the best of our knowledge. In addition, the H2-rich (36 mol%) gas stream produced as a byproduct is attractive for green fuel applications. The process adds up to an ∼80% increase in the value addition of bio-glycerol, which improves the overall fuel yield of the biodiesel production process towards improved atom efficiency and process economy.
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Affiliation(s)
- Vijendra Singh
- Light Stock Processing Division, Council of Scientific & Industrial Research-Indian Institute of Petroleum, Dehradun, 248005, Uttarakhand, India. .,Academy of Scientific and Innovative Research (AcSIR) at CSIR-Indian Institute of Petroleum, Dehradun, 248005, Uttarakhand, India
| | - Selvamani Arumugam
- Light Stock Processing Division, Council of Scientific & Industrial Research-Indian Institute of Petroleum, Dehradun, 248005, Uttarakhand, India. .,Academy of Scientific and Innovative Research (AcSIR) at CSIR-Indian Institute of Petroleum, Dehradun, 248005, Uttarakhand, India
| | - Anup Prakash Tathod
- Light Stock Processing Division, Council of Scientific & Industrial Research-Indian Institute of Petroleum, Dehradun, 248005, Uttarakhand, India. .,Academy of Scientific and Innovative Research (AcSIR) at CSIR-Indian Institute of Petroleum, Dehradun, 248005, Uttarakhand, India
| | - Viswanadham Nagabhatla
- Light Stock Processing Division, Council of Scientific & Industrial Research-Indian Institute of Petroleum, Dehradun, 248005, Uttarakhand, India. .,Academy of Scientific and Innovative Research (AcSIR) at CSIR-Indian Institute of Petroleum, Dehradun, 248005, Uttarakhand, India
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Hoang PH, Dat NM. Study on using cellulose derivatives as pore directing agent for preparation of hierarchical ZSM-5 zeolite catalyst. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Aqueous-Phase Cellulose Hydrolysis over Zeolite HY Nanocrystals Grafted on Anatase Titania Nanofibers. Catal Letters 2021. [DOI: 10.1007/s10562-020-03402-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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A kinetic study on the methanol conversion to dimethyl ether over H-ZSM-5 zeolite. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01586-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Di Fidio N, Fulignati S, De Bari I, Antonetti C, Raspolli Galletti AM. Optimisation of glucose and levulinic acid production from the cellulose fraction of giant reed (Arundo donax L.) performed in the presence of ferric chloride under microwave heating. BIORESOURCE TECHNOLOGY 2020; 313:123650. [PMID: 32585455 DOI: 10.1016/j.biortech.2020.123650] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 06/03/2020] [Accepted: 06/05/2020] [Indexed: 06/11/2023]
Abstract
A two-step exploitation of the giant reed cellulose to glucose and levulinic acid, after the complete removal of the hemicellulose fraction, was investigated using FeCl3 as catalyst. In the first step, the microwave-assisted hydrolysis of cellulose to glucose was optimised by response surface methodology analysis, considering the effect of temperature, reaction time and catalyst amount. Under the optimised reaction conditions, the glucose yield was 39.9 mol%. The cellulose-rich residue was also converted by enzymatic hydrolysis, achieving the glucose yield of 39.8 mol%. The exhausted residue deriving from the chemical hydrolysis was further converted to levulinic acid by microwave treatment at harsher reaction conditions. The maximum levulinic acid yield was 64.3 mol%. On the whole, this cascade approach ensured an extensive and sustainable exploitation of the C6 carbohydrates to glucose and levulinic acid, corresponding to about 70 mol% of glucan converted to these valuable bioproducts in the two steps.
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Affiliation(s)
- Nicola Di Fidio
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy
| | - Sara Fulignati
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy
| | - Isabella De Bari
- Laboratory for Processes and Technologies for Biorefineries and Green Chemistry, Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), CR Trisaia, S.S. 106 Jonica, 75026 Rotondella (MT), Italy
| | - Claudia Antonetti
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy.
| | - Anna Maria Raspolli Galletti
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy
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Park JH, Park YK, Kim YM. Kinetic analysis and catalytic pyrolysis of spent medicinal herb over HZSM-5 and HY. ENVIRONMENTAL RESEARCH 2020; 187:109632. [PMID: 32454307 DOI: 10.1016/j.envres.2020.109632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/19/2020] [Accepted: 05/01/2020] [Indexed: 06/11/2023]
Abstract
In this study, the kinetic analysis on the pyrolysis of a spent medicinal herb, namely spent Achyranthes root, is performed using a thermogravimetric analyzer and a model-free kinetic analysis method, allowing the calculation of activation energy values without the assumption of kinetic model. Owing to the structural change of lignin and elimination of hemicellulose during the decoction of raw Achyranthes root, the thermogravimetric analysis results show a large difference between the derivative thermogravimetry curves of spent and raw Achyranthes roots. The average apparent activation energy value of spent Achyranthes root, obtained from the non-isothermal thermogravimetric analysis, are found to be lower than those of raw Achyranthes root. This comes as a result of the much lower content of hemicellulose in spent Achyranthes root caused by the hemicellulose elimination from raw Achyranthes root during the decoction process. The catalytic fast pyrolysis of spent Achyranthes root over HZSM5-30 (HZSM-5 with SiO2/Al2O3 = 30) and HY30 (HY with SiO2/Al2O3 = 30) was performed using a two-stage fixed-bed reactor system. The catalytic fast pyrolysis of spent Achyranthes root over both HY30 and HZSM5-30 produced the much larger amount of aromatic hydrocarbons, compared to the non-catalytic fast pyrolysis, with a parallel decrease of oxygen-containing pyrolyzates. Owing to its robust pore structure and high acidity, it was the HZSM5-30 that produced the highest quality oil during the catalytic fast pyrolysis of spent Achyranthes root, having higher selectivity of mono-aromatic hydrocarbons compared to HY30.
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Affiliation(s)
- Ji Hui Park
- Department of Environmental Engineering, University of Seoul, Seoulsiridaro 163, Seoul, Republic of Korea
| | - Y-K Park
- Department of Environmental Engineering, University of Seoul, Seoulsiridaro 163, Seoul, Republic of Korea
| | - Young-Min Kim
- Department of Environmental Engineering, Daegu University, Gyeongsan, 38453, Republic of Korea.
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Multi-Step Exploitation of Raw Arundo donax L. for the Selective Synthesis of Second-Generation Sugars by Chemical and Biological Route. Catalysts 2020. [DOI: 10.3390/catal10010079] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Lignocellulosic biomass represents one of the most important feedstocks for future biorefineries, being a precursor of valuable bio-products, obtainable through both chemical and biological conversion routes. Lignocellulosic biomass has a complex matrix, which requires the careful development of multi-step approaches for its complete exploitation to value-added compounds. Based on this perspective, the present work focuses on the valorization of hemicellulose and cellulose fractionsof giant reed (Arundo donax L.) to give second-generation sugars, minimizing the formation of reaction by-products. The conversion of hemicellulose to xylose was undertaken in the presence of the heterogeneous acid catalyst Amberlyst-70 under microwave irradiation. The effect of the main reaction parameters, such as temperature, reaction time, catalyst, and biomass loadings on sugars yield was studied, developing a high gravity approach. Under the optimised reaction conditions (17 wt% Arundo donax L. loading, 160 °C, Amberlyst-70/Arundo donax L. weight ratio 0.2 wt/wt), the xylose yield was 96.3 mol%. In the second step, the cellulose-rich solid residue was exploited through the chemical or enzymatic route, obtaining glucose yields of 32.5 and 56.2 mol%, respectively. This work proves the efficiency of this innovative combination of chemical and biological catalytic approaches, for the selective conversion of hemicellulose and cellulose fractions of Arundo donax L. to versatile platform products.
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Hoang PH, Dat NM, Cuong TD, Tung DT. Production of 5-hydroxymethylfurfural (HMF) from rice-straw biomass using a HSO3–ZSM-5 zeolite catalyst under assistance of sonication. RSC Adv 2020; 10:13489-13495. [PMID: 35493003 PMCID: PMC9051459 DOI: 10.1039/d0ra02037k] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 03/26/2020] [Indexed: 01/23/2023] Open
Abstract
This work studied the application of sulfonated ZSM-5 zeolite, a bi-functional catalyst for conversion of biomass-derived glucose to HMF. Glucose hydrolysate was obtained by enzymatic hydrolysis of rice straw, that was pretreated by sodium hydroxide. Glucose hydrolysate was then subjected to a transformation reaction to achieve HMF using HSO3–ZSM-5 zeolite under the assistance of sonication. The reaction conditions including solvent, temperature, catalyst dosage and reaction time were studied. Suitable conditions, which gave the highest yield of HMF of 54.1% have been found. The HSO3–ZSM-5 zeolite presented a high catalytic efficiency for conversion of glucose to HMF, an important and useful intermediate in the chemical industry. A porous HSO3–ZSM-5 zeolite was successfully synthesized and applied for conversion of biomass-derived glucose to HMF.![]()
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Dehghani M, Tadjarodi A, Chamani S. Synthesis and Characterization of Magnetic Zeolite Y-Palladium-Nickel Ferrite by Ultrasonic Irradiation and Investigating Its Catalytic Activity in Suzuki-Miyaura Cross-Coupling Reactions. ACS OMEGA 2019; 4:10640-10648. [PMID: 31460162 PMCID: PMC6647955 DOI: 10.1021/acsomega.9b00666] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Accepted: 06/05/2019] [Indexed: 05/20/2023]
Abstract
Zeolite faujasite is widely used as a catalyst in many industrial catalytic applications. In this study, synthesis and characterization of magnetic zeolite Y-palladium-nickel ferrite were studied. First, palladium nanoparticles were combined with nickel ferrite and then placed on zeolite Y by ultrasonic treatment. The structure and morphology of the synthesized magnetic zeolite Y-palladium-nickel ferrite were characterized using Fourier transform infrared, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray, vibrating sample magnetometer, and inductively coupled plasma optical emission spectroscopy analysis. Also, we investigated the catalytic activity of this prepared zeolite in Suzuki-Miyaura coupling reaction between phenylboronic acid and aryl halides. Our study shows that magnetic zeolite Y-palladium-nickel ferrite is a suitable catalyst for Suzuki-Miyaura coupling reaction. Short reaction time, high yield, and easy reusability are the advantages of using this catalyst in carbon-carbon cross-coupling reactions.
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Affiliation(s)
- Modarres Dehghani
- Research Laboratory of Inorganic Materials
Synthesis, Department of Chemistry, Iran
University of Science and Technology, Narmak, Tehran 16844-13114, Iran
| | - Azadeh Tadjarodi
- Research Laboratory of Inorganic Materials
Synthesis, Department of Chemistry, Iran
University of Science and Technology, Narmak, Tehran 16844-13114, Iran
| | - Sanaz Chamani
- Research Laboratory of Inorganic Materials
Synthesis, Department of Chemistry, Iran
University of Science and Technology, Narmak, Tehran 16844-13114, Iran
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