Formation and O2/CO2 combustion characteristics of real-environment coal char in high-temperature oxy-fuel conditions

被引：36

作者：

Feng, Dongdong ^{[1
]}

Guo, Dawei ^{[1
]}

Zhao, Yijun ^{[1
]}

Tan, Heping ^{[1
]}

Chang, Guozhang ^{[2
]}

Zhang, Tianpeng ^{[3
]}

Sun, Shaozeng ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Energy Sci & Engn, 92 West Dazhi St, Harbin 150001, Heilongjiang, Peoples R China

[2] Ningxia Univ, State Key Lab High Efficiency Utilizat Coal & Gre, Yinchuan 750021, Peoples R China

[3] China Machinery Engn Corp, 178 Guanganmenwai St, Beijing 100055, Peoples R China

来源：

JOURNAL OF THE ENERGY INSTITUTE | 2019年 / 92卷 / 06期

基金：

国家重点研发计划; 中国博士后科学基金;

关键词：

Char; Oxy-fuel; Combustion; O-2; CO2; CO2 GASIFICATION REACTION; PULVERIZED COAL; MASS-TRANSFER; BIOMASS TAR; KINETICS; REACTIVITY; STEAM; H2O; DEVOLATILIZATION; ACTIVATION;

D O I：

10.1016/j.joei.2019.01.007

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：

080707 [能源环境工程]; 082001 [油气井工程];

摘要：

Oxygen-fuel combustion is a promising technology for CO2 emission reduction. The high-temperature entrained flow reactor and high-temperature drop tube furnace were used to analyses the formation and O-2/CO2 combustion characteristics of real-environment coal char in high-temperature oxy-fuel conditions. It proposed "inflection point standard" of high-temperature flame method for the preparation of real-environmental oxy-fuel coal char according to the flame method. The results show that the ratios of C=O/C-O and C=O/Car increase in the coal char compared with the raw coals. The trend of C=O/Car in oxy-fuel condition is opposite to that in the inert atmosphere, due to the effect of highconcentration CO2. To achieve the burnout rate similar to air combustion for coal char, with the increase of coal rank, the O-2 concentration should be enhanced. The optimal O-2 concentration for the oxyfuel combustion of JC anthracite is 30%, while that of other low-rank coals could be lower than 30%. The combustion characteristic of JC anthracite is with the highest sensitivity to temperature and O-2 concentration. (C) 2019 Energy Institute. Published by Elsevier Ltd. All rights reserved.

引用

页码：1670 / 1682

页数：13

共 45 条

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