| Title: | Heavy tar evolution characteristics during advanced sludge pyrolysis and biomass gasification integrated process |
| Author(s): | Han H; Li A; Zhu M; Hu S; Xu J; Xiong Z; Ren Q; Wang Y; Jiang L; Su S; Xiang J; |
| Address: | "State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan 430074, China. Electronic address: husong_hust@hotmail.com. State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan 430074, China" |
| DOI: | 10.1016/j.scitotenv.2022.158107 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Sludge pyrolysis and biomass gasification integrated process (SPBG) is an attractive route for the comprehensive utilization of the two materials but more tar is produced in this process compared to traditional biomass steam gasification. Nitrogen-containing compounds in the tar bring threatens to the environment and heavy components in the tar contributes to undesired coke formation. In current study, the evolution of heavy tar, especially the nitrogen-rich components, during SPBG is revealed for the first time. It was found that heavy components were mainly distributed in the mass range of 150-450 Da, where aromatics consisted of carbon, hydrogen and nitrogen atoms were the most abundant. Deamination (NH(3)) and the combination of quinoline accompanied with the generation of the heavy components. Organics from sludge could react with biomass to form heavier oxygen-containing molecules. Meanwhile, steam from sludge promoted heavy components to crack by tar reforming reactions and consumed radicals in bio-char to inhibit the catalytic cracking of tar. Under the combination of above reactions, more heavy molecules were generated at low sludge volatile/biomass ratio and the aromatic content in the heavy tar decreased at high sludge volatile/biomass ratio" |
| Keywords: | Pyrolysis Biomass Sewage Steam Gases *Coke Hydrogen Carbon Nitrogen Oxygen *Quinolines Heavy components Sludge Tar; |
| Notes: | "MedlineHan, Hengda Li, Aishu Zhu, Meng Hu, Song Xu, Jun Xiong, Zhe Ren, Qiangqiang Wang, Yi Jiang, Long Su, Sheng Xiang, Jun eng Netherlands 2022/09/03 Sci Total Environ. 2022 Dec 20; 853:158107. doi: 10.1016/j.scitotenv.2022.158107. Epub 2022 Aug 31" |
