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Zuo Z, Qi C, Ma J, Sun H, Luo S, Ren D, Zhang Y, Guo J, Cheng Z, Li C. Combustion Characteristics of Low Calorific Value Biogas and Reaction Path of NOx Based on Sensitivity Analysis. Front Chem 2022; 9:830329. [PMID: 35252126 PMCID: PMC8888680 DOI: 10.3389/fchem.2021.830329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 12/27/2021] [Indexed: 11/21/2022] Open
Abstract
The combustion mechanism of biogas mixture is unclear, which leads to the lack of basis for the control of operating parameters. Combustion characteristics and reaction path of typical low calorific value biogas with variation of preheating temperature and air equivalence ratio (Φ) are discussed in this paper. Preheating can not only improve the flame propagation speed and flame temperature, but also increase the proportion of NO in the product at the end of combustion flame. To some extent, improving combustion efficiency and NOx control are contradictory operating parameters. The amount of NO increases with the increase in flame distance. The maximum value of NO appears when Φ is 1.1. NO formation rate is improved by preheating the biogas. The paths of N2 → N2O →NO, N2 → NNH →NO, and N2 →NO are all enhanced. When the equivalence ratio changes from 1.0 to 0.8, NO formation rates decrease.
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Affiliation(s)
- Zongliang Zuo
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
- School of Energy and Power Engineering, Shandong University, Jinan, China
| | - Chuanjia Qi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
- School of Energy and Power Engineering, Shandong University, Jinan, China
| | - Jinshuang Ma
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
| | - Huiping Sun
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
| | - Siyi Luo
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
- *Correspondence: Siyi Luo,
| | - Dongdong Ren
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
| | - Yifan Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
| | - Jianxiang Guo
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
| | - Zhanjun Cheng
- School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - Chang Li
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
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