A pilot scale study on co-capture of SO2 and NOx in O2/CO2 recycled coal combustion and techno-economic evaluation

被引：5

作者：

Zou Chun ^{[1
]}

Huang ZhiJun ^{[1
]}

Xiong Jie ^{[1
]}

Guo Peng ^{[1
]}

Zheng ChuGuang ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Stated Key Lab Coal Combust, Wuhan 30074, Peoples R China

来源：

SCIENCE CHINA-TECHNOLOGICAL SCIENCES | 2010年 / 53卷 / 01期

基金：

中国国家自然科学基金;

关键词：

O-2/CO2; Oxyfuel; coal combustion; desulphurization; denitration; OXY-FUEL COMBUSTION; MIXTURES; AIR; REDUCTION; EMISSIONS;

D O I：

10.1007/s11431-009-0417-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper presents the study on co-capture of SO2 and NOx in O-2/CO2 recycled coal combustion in a pilot scale facility with the heat input of 0.3 MW by using high-sulphur lean coal. Detailed comparison of SO2 and NOx emission indexes and desulphurization and denitration rates have been made among three working conditions of O-2/CO2, O-2/CO2 with limestone injection (O-2/CO2+Ca) and O-2/RFG (recycled flue gas) with limestone injection (O-2/RFG+Ca). Combustion in air was performed as a base case. Results showed that in the O-2/RFG with limestone injection, desulphurization and denitration rates could reach up to 96% and 89%, respectively. Limestone injection under the high-CO2 atmosphere caused a significant reduction on SO2 emission and NOx emission as well. This indicated O-2/CO2 recycled coal combustion could reduce the investment on the flue gas purification. The techno-economic evaluation indicated that Oxy-combustion technique is not only feasible for CO2 emission control based on existing power plants but is also cost-effective.

引用

页码：155 / 159

页数：5

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