Some new insights into the synergy occurring during char gasification in CO2/H2O mixtures

被引：16

作者：

Liu, Rui ^{[1
]}

Zhang, Yan ^{[1
]}

Ling, Zheng ^{[1
]}

Song, Yongchen ^{[1
]}

机构：

[1] Dalian Univ Technol, Minist Educ, Key Lab Ocean Energy Utilizat & Energy Conservat, Sch Energy & Power Engn, 2 Linggong Rd, Dalian 116024, Peoples R China

来源：

FUEL | 2020年 / 268卷

基金：

中国国家自然科学基金;

关键词：

Synergy; Char gasification; Fixed-bed reactor; Micropore; Mesopore; COAL-GASIFICATION; MIXED ATMOSPHERES; CO2; H2O; REACTIVITY; PYROLYSIS; BIOMASS; STEAM; COMPETITION; EVOLUTION;

D O I：

10.1016/j.fuel.2020.117307

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This study aimed to investigate the mutual effects of CO2, H2O, and their mixtures on char reactivity and to explore the essence of the observed interaction between CO2 and H2O during char gasification. A Y-type dual fixed-bed (DFB) reactor was designed for gasification studies, which allowed direct comparison of product gas compositions between the separate and mixed gasification modes. Experimental and analytical data provided conclusive evidence of synergistic interaction between CO2 and H2O during gasification in mixed atmospheres. The results revealed that H2O played a role in promoting the development of mesopores, which allowed CO2 to enter the micropores more rapidly and to contribute to the observed synergy. This observed synergy increased with the increasing volume fraction of the reactant gases, while it decreased with the rising gasification temperature.

引用

页数：8

共 31 条

[1] Investigation into Ca/Na compounds catalyzed coal pyrolysis and char gasification with steam [J].

Bai, Yonghui ;

Lv, Peng ;

Li, Fan ;

Song, Xudong ;

Su, Weiguang ;

Yu, Guangsuo .

ENERGY CONVERSION AND MANAGEMENT, 2019, 184 :172-179

[2] Synergistic effect between CO2 and H2O on reactivity during coal chars gasification [J].

Bai, Yonghui ;

Wang, Yulong ;

Zhu, Shenghua ;

Yan, Lunjing ;

Li, Fan ;

Xie, Kechang .

FUEL, 2014, 126 :1-7

[3] Effects of CO2 on gas evolution and char structure formation during lump coal pyrolysis at elevated pressures [J].

Bai, Yonghui ;

Wang, Pei ;

Yan, Lunjing ;

Liu, Changlong ;

Li, Fan ;

Xie, Kechang .

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 2013, 104 :202-209

[4] Influenced of CO2 injection on biomass gasification [J].

Butterman, Heidi C. ;

Castaldi, Marco J. .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2007, 46 (26) :8875-8886

[5] CO2 as a Carhon Neutral Fuel Source via Enhanced Biomass Gasification [J].

Butterman, Heidi C. ;

Castaldi, Marco J. .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2009, 43 (23) :9030-9037

[6] Effect of pyrolysis conditions on the char gasification with mixtures of CO2 and H2O [J].

Chen, Chao ;

Wang, Jing ;

Liu, Wei ;

Zhang, Sen ;

Yin, Jingshu ;

Luo, Guangqian ;

Yao, Hong .

PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2013, 34 :2453-2460

[7] Competitive or additive behavior for H2O and CO2 gasification of coal char? Exploration via simplistic atomistic simulation [J].

Du, Yongbo ;

Wang, Chang'an ;

Xin, Haihui ;

Che, Defu ;

Mathews, Jonathan P. .

CARBON, 2019, 141 :226-237

[8] Reaction kinetics of pulverized coal-chars derived from inertinite-rich coal discards: Characterisation and combustion [J].

Everson, RC ;

Neomagus, HWJP ;

Kasaini, H ;

Njapha, D .

FUEL, 2006, 85 (7-8) :1067-1075

[9] Impact of calcium on the synergistic effect for the reactivity of coal char gasification in H2O/CO2 mixtures [J].

Gao, Meiqi ;

Yang, Zhirong ;

Wang, Yulong ;

Bai, Yonghui ;

Li, Fan ;

Xie, Kechang .

FUEL, 2017, 189 :312-321

[10] Influence of temperature and particle size on the single and mixed atmosphere gasification of biomass char with H2O and CO2 [J].

Guizani, C. ;

Sanz, F. J. Escudero ;

Salvador, S. .

FUEL PROCESSING TECHNOLOGY, 2015, 134 :175-188

← 1 2 3 4 →