Advances in Engineering Advances in Engineering features breaking research judged by Advances in Engineering advisory team to be of key importance in the Engineering field. Papers are selected from over 10,000 published each week from most peer reviewed journals.
SIGNIFICANCE STATEMENT
Due to the varieties of existing plasma sources, it is very inconvenient to directly compare the performances of plasma reactions. It is necessary to establish intrinsic parameters and equations to investigate the kinetics of plasma reactions, in particular CO2 reforming of CH4. The kinetics of CO2 reforming of CH4 in kilohertz spark-discharge plasma was studied at the molar ratio of CH4 : CO2 = 1 : 1 in this paper. For the plasma reforming reaction, the kinetic rate equation involving the significant parameters of pd (the product of total pressure and electrode gap) and specific energy input (SEI) at various frequencies (f) was established for the first time. The dependence of the CH4 and CO2 conversions (XR, R = CH4 or CO2) on pd product, SEI and f was elucidated. The kinetic rate equations were established and expressed as follows: XR / (1-XR)= kR (pd)·SEI, where kR is the rate constant of reactant conversion. The reliability of the rate equation was verified by a comparison between the calculated value from the equation and the experimental data.
FIGURE LEGENDS: Below is a figure of the kinetic rate constants as a function of pd (the product of total pressure and electrode gap), at a fixed frequency (f), for which the kinetic rate equation was established for the first time.
Journal Reference
Bin Zhu, Xiao-Song Li, Jing-Lin Liu, Xiaobing Zhu*, Ai-Min Zhu*, “Kinetics study on carbon dioxide reforming of methane in kilohertz spark-discharge plasma”, Chemical Engineering Journal, Volume 264, 15 March 2015, Pages 445-452
[expand title=”Show Affiliations”]Center for Hydrogen Energy and Liquid Fuels, Dalian University of Technology, Dalian 116024, China
Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian 116024, China
[/expand]Abstract
The kinetics of CO2 reforming of CH4 in kilohertz spark-discharge plasma was studied. At CH4/CO2 ratio of 1, the effects of specific energy input (SEI), electrode gap (d), total pressure (p) and frequency of the applied voltage (f) on the reactant conversions and C-based and H-based selectivities were investigated. Thereby, the kinetic rate equation for CO2 reforming of CH4 in spark-discharge plasma was established. The dependence of the CH4 and CO2 conversions (XCH4,XCO2) on pd value (the product of p and d) andSEI can be expressed as follows: XCH4/(1-XCH4)=kCH4·(pd)·SEI and XCO2/(1-XCO2)=kCO2·(pd)·SEI, where kCH4 and kCO2 are the rate constant of CH4 and CO2 conversion, respectively. Increasing f from 5 to 80 kHz, kCH4 and kCO2 increase from 0.78 and 0.53 mol·MJ−1·bar−1·mm−1 to 1.04 and 0.63 mol·MJ−1·bar−1·mm−1, respectively. The reliability of the rate equation was verified by a comparison between the calculated value and the experimental data.
Go To Chemical Engineering Journal
FEATURED AUTHORS INFORMATION
Ai-Min Zhu, PhD
Professor of Plasma Chemistry & Chemical Engineering
Laboratory of Plasma Physical Chemistry, Dalian University of Technology
Prof. Ai-Min Zhu has been appointed as a full professor since 2005 at Dalian University of Technology (DUT). Since 2000 the research interests of his group focus mainly on plasma catalysis, plasma reactor, plasma processing, reaction kinetics and plasma applications. In particular, non-thermal plasma (NTP) technologies are of interest to develop for environmental, energy and chemical applications such as:
(1) Plasma chemical conversion of biogas, natural gas and greenhouse gas
(2) Plasma technologies for indoor air cleaning and waste gas treatment
(3) Plasma synthesis and modification of TiO2-based photocatalysts and their applications
Contact information:
Laboratory of Plasma Physical Chemistry, Dalian University of Technology
9 Building A3, 2 Linggong Road, Dalian 116024, China
Tel./Fax: +86-411-84706094, Email: [email protected]
Xiaobing Zhu, PhD
Associate Professor of Chemical Engineering
Center for Hydrogen Energy and Liquid Fuels
Laboratory of Plasma Physical Chemistry, Dalian University of Technology
Dr. Xiaobing Zhu joined Dalian University of Technology (DUT), China as an Associate Professor of Chemical Engineering since July 2013. Prior to that, he worked in United States for over six years as a research Assistant Professor and a Principle Investigator at University of Houston, and a postdoctoral fellow at Lawrence Berkeley National Laboratory and Georgia Institute of Technology. In March 2007, he achieved his Ph.D. degree of Chemical Engineering at Dalian Institute of Chemical Physics, Chinese Academy of Sciences.
Currently, research interests include:
(1) Plasma reforming for hydrogen/syngas production
(2) Plasma synthesis and modification of photo-/electro- catalytic materials
(3) Electric and chemical energy conversion on molecular platform of C1, hydrogen and oxygen
(4) CO2 reduction towards fuels and chemicals synthesis
Contact information:
Center for Hydrogen Energy and Liquid Fuels, Laboratory of Plasma Physical Chemistry, Dalian University of Technology
9 Building A3, 2 Linggong Road, Dalian 116024, China
Phone/Fax: +86-411-84706094 (Office), Email: [email protected]
