| Combustion and Sulfur-fixing Performance of Pulping Black Liquor Coal-water Slurry |
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| Author Name | Affiliation | | BaoNong Tian1,/sup> | 1. School of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province, 266042, China | | LianQing Huang1 | 1. School of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province, 266042, China | | JunHong Zhang1 | 1. School of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province, 266042, China | | FuShan Chen2,* | 2. State Key Laboratory of Eco-Chemical Engineering, Qingdao, Shandong Province, 266042, China |
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| Fund Project:The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (No. 21576146). |
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| Abstract:The effects of adding pulping black liquor and other additives to coal-water slurry (CWS) on the sulfur-fixing performance of the resultant mixture (pulping black liquor coal-water slurry) were evaluated. The experimental results demonstrated that the ash content of the black liquor coal-water slurry decreased as the addition of pulping black liquor in the mixture increased. Nevertheless, the addition amount should be appropriately selected to ensure that the black liquor coal-water slurry had a moderate calorific value. Addition of black liquor improved the combustion performance of CWS by lowering the ignition point and stabilizing the combustion process; moreover, the sulfur-fixation ratio after combustion increased by 12 to 16 percentage points than that of CWS, and the content of high-melting-point salt in the ash from CWS after adding black liquor was low. The sulfur-fixing ratio of CWS after adding a sulfur-fixing agent was effectively increased by 25 to 30 percenatge points, but with compromise of the fluidity and stability of the CWS; thus, the addition amount of a sulfur-fixing agent should be optimized. |
| keywords:pulping black liquor coal-water slurry combustion performance sulfur-fixing performance |
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