期刊论文详细信息
JOURNAL OF CLEANER PRODUCTION 卷:265
A new approach of reduction of carbon dioxide emission and optimal use of carbon and hydrogen content for the desired syngas production from coal
Article
Lu, Wenyang1  Cao, Qingxi1  Xu, Bang1  Adidharma, Hertanto6  Gasem, Khaled6  Argyle, Morris2  Zhang, Fan1  Zhang, Yulong3  Fan, Maohong1,4,5,6 
[1] Univ Wyoming, Dept Chem, Laramie, WY 82071 USA
[2] Brigham Young Univ, Chem Engn Dept, Provo, UT 84602 USA
[3] Western Res Inst, 3474 North 3rd St, Laramie, WY 82072 USA
[4] Univ Wyoming, Sch Energy Resources, Laramie, WY 82071 USA
[5] Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA
[6] Univ Wyoming, Dept Chem & Petr Engn, Laramie, WY 82071 USA
关键词: Coal;    Catalysis;    Pyrolysis;    Gasification;    Ideal syngas;    CO2 reduction;   
DOI  :  10.1016/j.jclepro.2020.121786
来源: Elsevier
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【 摘 要 】

This research is designed to make progress in overcoming the challenges through the development of a two-stage coal processing. Specifically, a two-stage process was used to maximize the use of the carbon in coal or increase the carbon monoxide yield or lower carbon dioxide and methane yields. Carbon dioxide-char gasification in the absence of water can generate carbon monoxide with near-zero methane, which is desired to produce high-carbon and low-hydrogen chemicals such as oxalic acid through catalytic carbon monoxide coupling and hydrolysis. The technology is applicable to any coal, although Power River Basin (PRB) coal is used as an example feedstock in this research Also, the sodium-iron catalyst can accelerate not only the reaction kinetics in both stages but also increase the hydrogen/carbon monoxide ratio in the syngas produced in the second stage. In other words, the catalyst is a multifunctional agent, which can not only intensify the overall coal process efficiency but also improve the qualities of the desired syngas products and reduce carbon dioxide emission. Thus, In the 1st stage, the catalysts can significantly reduce the CO2-char gasification by as high as 75.00%. In the 2nd stage, the H-2/CO ratio of ideal syngas is similar to 2:1 with near-0 CH4 generation and the CH4 production can be reduced as high as 61.29% for the CO2-H2O-Char coal gasification. The activation energy for the 2nd stage is reduced by as high as 35.43% than that of raw coal without use NaeFe catalyst. The overall carbon footprint reduction for the study is reduced by 87.33% in the 1st stage and 96.77% compared to the direct coal combustion. (c) 2020 Elsevier Ltd. All rights reserved.

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