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Dahiru UH, Saleem F, Zhang K, Harvey A. Plasma-assisted removal of methanol in N 2, dry and humidified air using a dielectric barrier discharge (DBD) reactor. RSC Adv 2022; 12:10997-11007. [PMID: 35425072 PMCID: PMC8989026 DOI: 10.1039/d2ra01097f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 03/30/2022] [Indexed: 11/21/2022] Open
Abstract
In this work, a non-thermal plasma dielectric barrier discharge (DBD) was used to remove methanol from ambient air. The effects of carrier gases (N2, dry and humidified air), power (2-10 W), inlet concentration (260-350 ppm), and residence time (1.2-3.3 s) were investigated to evaluate the performance of the plasma DBD reactor in terms of removal efficiency, product selectivity and reduction of unwanted by-products at ambient temperature and atmospheric pressure. It was found that the conversion of methanol increased with power and residence time regardless of the carrier gas used. However, the removal efficiency decreased with the increasing concentration of CH3OH. Almost complete removal of methanol (96.7%) was achieved at 10 W and a residence time of 3.3 s in dry air. The removal efficiency of methanol followed a sequence of dry air > humidified air > N2 carrier gas. This was due to the action of the O radical in dry air, which dominates the decomposition process of the plasma system. The introduction of water vapour into the DBD system decreased the removal efficiency but had a number of significant advantages: increased CO2 selectivity and yield of H2, it significantly reduced the formation of O3, CO and higher hydrocarbons. These influences are probably due to the presence of potent OH radicals, and the conversion pathways for the various effects are proposed. It is important to note that no solid residue was formed in the DBD reactor in any carrier gas. Overall, this research indicates that methanol can be almost completely removed with the correct operating parameters (96.7% removal; 10 W; 3.3 s) and shows that humidification of the gas stream is beneficial.
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Affiliation(s)
- Usman H Dahiru
- Department of Chemical Engineering, School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK .,Raw Materials Research and Development Council, Federal Ministry of Science and Technology Abuja Nigeria
| | - Faisal Saleem
- Department of Chemical Engineering, School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK .,Department of Chemical and Polymer Engineering, University of Engineering and Technology Lahore, Faisalabad Campus Pakistan
| | - Kui Zhang
- Department of Chemical Engineering, School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK
| | - Adam Harvey
- Department of Chemical Engineering, School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK
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Yang L, Zhang X, Kan Q, Zhao B, Ma X. Effect of gas composition on nitric oxide removal from simulated flue gas with DBD-NPC method. Chin J Chem Eng 2019. [DOI: 10.1016/j.cjche.2019.01.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
Abstract
In China, the rapid development greatly promotes the national economic power and living standard but also inevitably brings a series of environmental problems. In order to resolve these problems fundamentally, Chinese scientists have been undertaking research in the area of green chemical engineering (GCE) for many years and achieved great progresses. In this paper, we reviewed the research progresses related to GCE in China and screened four typical topics related to the Chinese resources characteristics and environmental requirements, i.e. ionic liquids and their applications, biomass utilization and bio-based materials/products, green solvent-mediated extraction technologies, and cold plasmas for coal conversion. Afterwards, the perspectives and development tendencies of GCE were proposed, and the challenges which will be faced while developing available industrial technologies in China were mentioned.
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Gong W, Liu X, Xia S, Liang B, Zhang W. Abiotic reduction of trifluralin and pendimethalin by sulfides in black-carbon-amended coastal sediments. JOURNAL OF HAZARDOUS MATERIALS 2016; 310:125-134. [PMID: 26905610 DOI: 10.1016/j.jhazmat.2016.02.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 01/25/2016] [Accepted: 02/08/2016] [Indexed: 06/05/2023]
Abstract
Dinitroaniline herbicides such as trifluralin and pendimethalin are persistent bioaccumulative toxins to aquatic organisms. Thus, in-situ remediation of contaminated sediments is desired. This study investigated whether black carbons (BCs), including apple wood charcoal (BC1), rice straw biochar (BC2), and activated carbon (BC3), could facilitate abiotic reduction of trifluralin and pendimethalin by sulfides of environmentally-relevant concentrations in anoxic coastal sediments. The reduction rates of trifluralin and pendimethalin increased substantially with increasing BC dosages in the sediments. This enhancing effect was dependent on BC type with the greatest for BC3 followed by BC1 and BC2, which well correlated with their specific surface area. The pseudo-first order reduction rate constants (kobs) for BC3-amended sediment (2%) were 13- and 14 times the rate constants in the BC-free sediment. The reduction rates increased with increasing temperature from 8 to 25°C in the BC-amended sediment, following the Arrhenius relationship. Finally, through molecular modeling by density functional theory and reaction species identification from mass spectra, molecular pathways of trifluralin and pendimethalin reduction were elucidated. In contrary to the separate sequential reduction of each nitro group to amine group, both nitro groups, first reduced to nitroso, then eventually to amine groups.
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Affiliation(s)
- Wenwen Gong
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Xinhui Liu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
| | - Shuhua Xia
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Baocui Liang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Wei Zhang
- Department of Plant, Soil and Microbial Sciences and Environmental Science and Policy Program, Michigan State University, East Lansing, MI 48824, United States.
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Zhang H, Zhu F, Li X, Cen K, Du C, Tu X. Enhanced hydrogen production by methanol decomposition using a novel rotating gliding arc discharge plasma. RSC Adv 2016. [DOI: 10.1039/c5ra26343c] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hydrogen production from methanol decomposition was performed in a novel direct current (DC) rotating gliding arc (RGA) plasma reactor.
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Affiliation(s)
- Hao Zhang
- State Key Laboratory of Clean Energy Utilization
- Zhejiang University
- Hangzhou 310027
- China
| | - Fengsen Zhu
- State Key Laboratory of Clean Energy Utilization
- Zhejiang University
- Hangzhou 310027
- China
| | - Xiaodong Li
- State Key Laboratory of Clean Energy Utilization
- Zhejiang University
- Hangzhou 310027
- China
| | - Kefa Cen
- State Key Laboratory of Clean Energy Utilization
- Zhejiang University
- Hangzhou 310027
- China
| | - Changming Du
- School of Environmental Science and Engineering
- Sun Yat-Sen University
- Guangdong 510275
- China
| | - Xin Tu
- Department of Electrical Engineering and Electronics
- University of Liverpool
- Liverpool L69 3GJ
- UK
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Zhang H, Zhu F, Bo Z, Cen K, Li X. Hydrogen Production from Methanol Decomposition in a Gliding Arc Discharge Plasma with High Processing Capacity. CHEM LETT 2015. [DOI: 10.1246/cl.150563] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hao Zhang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University
| | - Fengsen Zhu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University
| | - Zheng Bo
- State Key Laboratory of Clean Energy Utilization, Zhejiang University
| | - Kefa Cen
- State Key Laboratory of Clean Energy Utilization, Zhejiang University
| | - Xiaodong Li
- State Key Laboratory of Clean Energy Utilization, Zhejiang University
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Density Functional Theory (DFT) study on the pyrolysis of cellulose: The pyran ring breaking mechanism. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2015.05.001] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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The catalytic effect of H2 in the dehydrogenation coupling production of ethylene glycol from methanol using a dielectric barrier discharge. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(14)60239-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Huang X, Cheng DG, Chen F, Zhan X. Reaction pathways of β-D-glucopyranose pyrolysis to syngas in hydrogen plasma: a density functional theory study. BIORESOURCE TECHNOLOGY 2013; 143:447-454. [PMID: 23831743 DOI: 10.1016/j.biortech.2013.06.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 06/05/2013] [Accepted: 06/08/2013] [Indexed: 06/02/2023]
Abstract
In this work, density functional theory (DFT) was employed to investigate the reaction pathways of β-D-glucopyranose for better understanding the pyrolysis mechanism of cellulose in hydrogen plasma. Many possible reactions were considered, and the reaction enthalpies and activation energies of these reactions were calculated using density functional theory (DFT) with a Gaussian method of B3LYP and basic set of 6-31G(d,p). A most possible reaction pathway was brought up. According to this reaction pathway, the main products of cellulose pyrolysis in hydrogen plasma would be syngas, and few light hydrocarbons. CO mainly comes from the decomposition of aldehyde group, while H2 mainly comes from dehydrogenation processes. Active H in plasma are found to play a very important role in many reactions, and they can remarkably lower the energies needed for reactions.
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Affiliation(s)
- Xiaoyuan Huang
- Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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Zhang J, Yuan Q, Zhang J, Li T, Guo H. Direct synthesis of ethylene glycol from methanol by dielectric barrier discharge. Chem Commun (Camb) 2013; 49:10106-8. [DOI: 10.1039/c3cc45877f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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LÜ YJ, YAN WJ, HU SH, WANG BW. Hydrogen production by methanol decomposition using gliding arc gas discharge. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/s1872-5813(12)60025-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Nie X, Liu X, Gao L, Liu M, Song C, Guo X. SO3H-Functionalized Ionic Liquid Catalyzed Alkylation of Catechol with tert-Butyl Alcohol. Ind Eng Chem Res 2010. [DOI: 10.1021/ie100800c] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaowa Nie
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China, and EMS Energy Institute and Department of Energy & Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
| | - Xin Liu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China, and EMS Energy Institute and Department of Energy & Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
| | - Lei Gao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China, and EMS Energy Institute and Department of Energy & Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
| | - Min Liu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China, and EMS Energy Institute and Department of Energy & Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
| | - Chunshan Song
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China, and EMS Energy Institute and Department of Energy & Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
| | - Xinwen Guo
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China, and EMS Energy Institute and Department of Energy & Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
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Sulfur hexafluoride plasma surface modification of Gly-Ala and Ala-Gly as Bombyx mori silk model compounds: Mechanism investigations. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2009.10.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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