Non-catalytic supercritical water partial oxidation mechanism of coal

被引:19
作者
Ge, Zhiwei [1 ]
Guo, Shenghui [1 ]
Ren, Changyifan [1 ]
Wang, Yu [1 ]
Guo, Liejin [1 ]
Jin, Hui [1 ]
机构
[1] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China
基金
国家重点研发计划;
关键词
Coal gasification; Supercritical water; Kinetics; Hydrogen production; Partial oxidation; UNCATALYZED PARTIAL OXIDATION; CATALYZED PARTIAL OXIDATION; DETAILED REACTION PATHWAY; CHINA CURRENT STATUS; HYDROGEN-PRODUCTION; BIOMASS GASIFICATION; N-HEXADECANE; HYDROTHERMAL GASIFICATION; CHEMICAL-REACTIONS; MUNICIPAL SLUDGE;
D O I
10.1016/j.ijhydene.2020.05.202
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Supercritical water partial oxidation (SCWPO) is a clean and efficient coal conversion method to produce H-2. However, the detailed SCWPO mechanism of coal is still unknown at present. In this paper, a lumped kinetic model is used to propose a non-catalytic SCWPO mechanism of coal. The results show that oxidation reaction of intermediate carbon is under diffusion control. Bituminous coal is harder to be gasified than lignite, due to the denser structure of bituminous coal. CH4 is produced only from coal pyrolysis, and it is negligible for steam reforming of CH4 without catalyst. The ash in coal plays a certain catalysis on water-gas shift reaction. The proposed mechanism provides important insights in SCWPO process of coal. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:21178 / 21185
页数:8
相关论文
共 108 条
[1]   Roles of water for chemical reactions in high-temperature water [J].
Akiya, N ;
Savage, PE .
CHEMICAL REVIEWS, 2002, 102 (08) :2725-2750
[2]   Partial oxidation of n-hexadecane through decomposition of hydrogen peroxide in supercritical water [J].
Alshammari, Y. M. ;
Hellgardt, K. .
CHEMICAL ENGINEERING RESEARCH & DESIGN, 2015, 93 :565-575
[3]  
[Anonymous], 2002, NRELCP61032405
[4]   Hydrogenation of hydrocarbons through partial oxidation in supercritical water [J].
Arai, K ;
Adschiri, T ;
Watanabe, M .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2000, 39 (12) :4697-4701
[5]   Partial oxidation of propane in sub- and supercritical water [J].
Armbruster, U ;
Martin, A ;
Krepel, A .
JOURNAL OF SUPERCRITICAL FLUIDS, 2001, 21 (03) :233-243
[6]   Biomass Gasification in Supercritical Water - A Review [J].
Basu, Prabir ;
Mettanant, Vichuda .
INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING, 2009, 7
[7]   Heterogeneously catalyzed partial oxidation of methane in supercritical water [J].
Bröll, D ;
Krämer, A ;
Vogel, H .
CHEMICAL ENGINEERING & TECHNOLOGY, 2003, 26 (07) :733-737
[8]  
Bröll D, 2001, CHEM ENG TECHNOL, V24, P142, DOI 10.1002/1521-4125(200102)24:2<142::AID-CEAT142>3.0.CO
[9]  
2-W
[10]   Supercritical water gasification of black liquor with wheat straw as the supplementary energy resource [J].
Cao, Changqing ;
Zhang, Yi ;
Li, Linhu ;
Wei, Wenwen ;
Wang, Gaoyun ;
Bian, Ce .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2019, 44 (30) :15737-15745