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随着炼油工业和天然气工业的快速发展,针对SO2排放的环保要求日益严格。对于炼油加工和天然气净化过程所产生的含硫酸性气体,硫磺回收加尾气处理工艺是主要的治理方式,其中TiO2基硫磺回收催化剂逐步得到广泛应用。通过一系列的XPS、XRD、TEM、FT-IR、CO2-TPD、NH3-TPD和吡啶红外分析表征手段,进一步认识到钛基催化剂的表面化学特性,其活性组分为锐钛矿相TiO2,晶粒为纳米级晶粒,具有弱碱性位和中强碱性位。
With the rapid development of the oil refining industry and natural gas industry, the environmental protection requirements for SO2 emissions have become increasingly stringent. For the refining process and natural gas purification process generated by the acid gas, sulfur recovery plus exhaust gas treatment process is the main way, including TiO2-based sulfur recovery catalyst gradually been widely used. A series of XPS, XRD, TEM, FT-IR, CO2-TPD, NH3-TPD and pyridine analysis were used to characterize the surface chemistry of titanium-based catalysts. The active components were anatase TiO2, The grains are nano-scale grains, with weakly alkaline sites and strongly basic sites.