文献类型：期刊文献

英文题名：Oxy-fuel combustion of lean acid gas for high sulfur recovery efficiency based on straight-through claus process

作者：Tao, Xun[1];Yu, Xinlei[1];Guo, Songling[1];Zhou, Fan[1];Gao, Yunfei[1];Ding, Lu[1];Dai, Zhenghua[1];Wang, Fuchen[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, Shanghai 200237, Peoples R China

年份：2023

卷号：110

外文期刊名：GAS SCIENCE AND ENGINEERING

收录：;EI(收录号：20233714727770);WOS:【SCI-EXPANDED(收录号:WOS:001001756500001)】；

基金：Acknowledgements The project was supported by the National Natural Science Foun-dation of China (21978092) ; Yangfan Program by ScientificalAdministration of Shanghai (22YF1410300) ; Chenguang Program by Educational Administration of Shanghai (21CGA35) .

语种：英文

外文关键词：Oxy-fuel combustion; Lean acid gas; Claus process; Sulfur recovery efficiency; Aspen plus model

摘要：Present methods mainly adopt air as an oxidizer for recovering sulfur from lean acid gas, the presence of N2 is detrimental to the combustion of lean acid gas. In this study, oxy-fuel combustion technology was applied to straight-through Claus process for sulfur recovery from lean acid gas. Aspen Plus model was established and successfully verified by the plant data. Oxy-fuel combustion were compared with the present methods using air or O2-enriched air. The effect of acid gas preheating temperature, CO2 addition and H2O addition on the oxy-fuel combustion of lean acid gas was analyzed with a focus on the sulfur recovery efficiency. The results indicated that oxy-fuel combustion had a clear superiority over the other schemes in the sulfur recovery, CO2 conversion and H2 formation in the thermal section, whereas a lower H2S/SO2 ratio decreased the sulfur recovery efficiency in the catalytic section. The total sulfur recovery efficiency was increased to 96.99% by optimizing the oxygen quantity, whereas was essentially unchanged in the thermal section, which provided an opportunity to reduce the number of catalytic units. Increasing the preheating temperature and the CO2 and H2O amount decreased the total sulfur recovery efficiency, where CO2 had a minor effect. The acid gas preheating slightly increased the sulfur recovery efficiency in the thermal section, whereas CO2 and H2O decreased it. This study provided novel insights into the application of oxy-fuel combustion to Claus process for improving sulfur recovery from lean acid gas.