摘要
研究了H_(2)S/CH_(4)的富燃料燃烧过程,考察了三种燃气比例(H_(2)S与CH_(4)体积比为4:1,1:1,1:4)下,CH_(4)对H_(2)S氧化及COS和CS_(2)生成过程的影响。实验过程中,采用同轴双通道烧嘴,H_(2)S与CH_(4)经烧嘴中心通道进入射流反应器,空气经烧嘴环隙通道进入反应器,形成扩散火焰,测定了稳定后反应器中心轴向各位置的温度和气体浓度。结果表明:靠近烧嘴区域,H_(2)S在与CH_(4)的竞争氧化中处于优势,产物主要有S_(2)和H_(2)O,CO与CO_(2)的生成受到抑制;生成的S_(2)能与未氧化的CH_(4)进行反应生成CS_(2),可以观察到CS_(2)浓度明显高于CO_(2),由此推断此时CH_(4)与S_(2)的反应速率可能快于其与O_(2)的反应速率。在温度峰值区域大量生成H_(2),CO和C_(2)H_(4),并在反应器中下游被氧化消耗,开始大量生成SO_(2)。此外,由于CO浓度低,难以与S_(2)和SH等含硫物质反应生成COS,因而COS浓度较低。
The H_(2)S/CH_(4)fuel-rich combustion process was studied to investigate the effect of CH_(4)on H_(2)S oxidation and formation of COS and CS_(2)at different volume ratio of H_(2)S to CH_(4)ratios(4:1,1:1,1:4).During the experiment,H_(2)S and CH_(4)entered the reactor through the central channel of the coaxial dual-channel burner and air entered through the annular gap channel to form a diffusion flame,then the temperature and concentration were measured at each position in the central axial direction when stabilized.The results showed that H_(2)S had an advantage in competitive oxidation with CH_(4)near the burner area and products were mainly S_(2)and H_(2)O,while the generation of CO and CO_(2)was inhibited;the generated S_(2)could react with CH_(4)to produce CS_(2),and it could be observed that the concentration of CS_(2)was significantly higher than CO_(2),thus inferring that the reaction rate of CH_(4)and S_(2)may be faster than O_(2).H_(2),CO and C_(2)H_(4)were generated in large quantities in the peak temperature region and consumed by oxidation downstream,where SO_(2)starts to be generated in large quantities.In addition,the absent COS was due to the low concentration of CO,which was difficult to react with sulfur-containing substances such as S_(2)and SH to generate COS.
作者
郭松灵
李洋
喻昕蕾
陶迅
梁钦锋
丁路
许建良
代正华
王辅臣
GUO Songling;LI Yang;YU Xinlei;TAO Xun;LIANG Qingfeng;DING Lu;XU Jianliang;DAI Zhenghua;WANG Fuchen(Institute of Clean Coal Technology,East China University of Science and Technology,Shanghai 200237,China;Guangdong Meizhi Compressor Limited,Foshan 528300,China)
出处
《化学反应工程与工艺》
CAS
2021年第5期414-423,445,共11页
Chemical Reaction Engineering and Technology
基金
国家自然科学基金(21978092)。
关键词
硫化氢
甲烷
碳硫化物
富燃料燃烧
hydrogen sulfide
methane
carbon sulfur compound
fuel-rich combustion
