Sulfur retention efficiency of clean coke produced by co-pyrolysis of coal with CaCO3 to substitute household coal

Shoujun Liu; Mingyi Wang; Kaixia Zhang; Zhongliang Yu; Song Yang; Ju Shangguan; Guoqiang Zhang; Wenguang Du; Jin Li; Yuehua Liu

Carbon Resources Conversion (Jan 2021)

Sulfur retention efficiency of clean coke produced by co-pyrolysis of coal with CaCO3 to substitute household coal

Shoujun Liu,
Mingyi Wang,
Kaixia Zhang,
Zhongliang Yu,
Song Yang,
Ju Shangguan,
Guoqiang Zhang,
Wenguang Du,
Jin Li,
Yuehua Liu

Affiliations

Shoujun Liu: College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Shanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Key Laboratory for Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
Mingyi Wang: College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Shanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
Kaixia Zhang: Shanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Key Laboratory for Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
Zhongliang Yu: Shanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; College of Coal Chemistry Engineering, Shangrao Normal University, Shangrao 334100, Jiangxi, China; Corresponding author at: Shanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China.
Song Yang: College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Shanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
Ju Shangguan: Shanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Key Laboratory for Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
Guoqiang Zhang: Shanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Key Laboratory for Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
Wenguang Du: College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Key Laboratory for Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
Jin Li: Key Laboratory for Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China; College of Coal Chemistry Engineering, Shangrao Normal University, Shangrao 334100, Jiangxi, China
Yuehua Liu: Shanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Key Laboratory for Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China; Taiyuan Green Coke Energy Co. Ltd, Taiyuan, Shanxi 030006, China

Journal volume & issue: Vol. 4
pp. 142 – 149

Abstract

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Raw coal is used by many suburban and rural households for cooking and heating and results in severe air pollution, especially problematic SO2 emissions. A source treatment strategy was proposed to reduce SO2 emissions, which used the co-pyrolysis of raw coal with a CaCO3 additive to produce clean coke. The effect of Ca/S molar ratio on the SO2 capture efficiency of clean coke was investigated, and the SO2 retention efficiency was optimized at a Ca/S molar ratio of 1.5. The sulfur retention mechanism of clean coke was attributed to: (1) CaCO3 decomposition to CaO and partial reaction of CaO with H2S to generate CaS during pyrolysis. (2) Transformation of the remaining sulfur in the clean coke to SO2 during combustion, capture by unreacted CaO to form CaSO4, and direct oxidation of CaS to CaSO4. The feasibility of SO2 emission reduction by clean coke in a practical household stove was verified.

Published in Carbon Resources Conversion

ISSN: 2588-9133 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Chemical technology
Website: https://www.keaipublishing.com/en/journals/carbon-resources-conversion/

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