文献类型：期刊文献

英文题名：Comparison of three combustion modes of H 2 S-CO 2 gas in Claus furnace for promoting reaction temperature

作者：Guo, Songling[1];Zhou, Fan[1];Shan, Jingjing[1];Wang, Yuying[1];Zeng, Wei[1];Gao, Yunfei[1];Ding, Lu[1];Wang, Fuchen[1]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China

年份：2024

卷号：367

外文期刊名：FUEL

收录：;EI(收录号：20241315800429);WOS:【SCI-EXPANDED(收录号:WOS:001219403400001)】；

基金：The project was supported by the National Nature Science Foundation of China (21978092) . The project was supported by the social development science and technology tackling project of 2021"Scientific and Innovative Action Plan of Shanghai" (21DZ1209000) .

语种：英文

外文关键词：Acid gas; Combustion mode; Temperature promotion; Diffusion flame; Equilibrium calculation

摘要：Stabilizing and promoting the temperature of the Claus furnace is important for the continuous conversion of acid gas (H 2 S and CO 2 ). In this study, the characteristics of three enhanced-combustion modes namely low equivalence ratio, oxygen-enriched and assisted combustion were compared via equilibrium calculation and diffusion flame under the same temperature-promoted condition. Equilibrium calculation was conducted using Gibbs reactor in Aspen Plus software. The flame was interpreted by the axial distributions of the temperature and species concentration. Both equilibrium calculation and experimental results showed enhanced combustion promoted the reactivity of H 2 S and CO 2 and generation of H 2 and CO. The diffusion flame could be classified into three zones namely decomposition, oxidation and complex section, among which decomposition section included H 2 S chemical decomposition and CO 2 reactivity. SO 2 was scarce in the first section and its generation was sensitive to equivalence ratio. COS and CS 2 were generated at flame area while CS 2 was only detected in assisted combustion. However, these combustibles could be consumed especially in sufficient oxygen atmosphere. Enhanced combustion exhibited insignificant impact on solid sulfur product. It was revealed assisted combustion generated more valuable H 2 and CO while producing significant pollutants COS and CS 2 . Low equivalence ratio combustion facilitated COS consumption but deviated H 2 S/SO 2 ratio. Overall, oxygen-enriched combustion was considered as the most promising combustion mode for increasing the temperature. This study provided reference for the selection of solutions to improve temperature of acid gas combustion in industrial Claus furnace.