同时降低FCC再生烟气SO_x排放与汽油硫含量助剂的研制

在SO_x转移剂技术的基础上,通过引入有效的汽油降硫催化活性组元,优化MgAl_2O_4载体的组成和孔结构,开发了同时降低FCC再生烟气SO_x排放与汽油硫含量的助剂TRANSTAR。在SO_x转移剂中引入复合金属氧化物MO-V_2O_5可以促进汽油中的含硫化合物以焦炭的形式沉积在催化剂上,从而降低汽油的硫含量,同时还能增强助剂对SO_2的氧化吸附-还原再生能力。实验室评价结果表明,TRANSTAR助剂在大幅度降低FCC烟气SO_x排放的同时,还具有较好的降低FCC汽油硫含量的性能,并对FCC催化剂的催化反应性能无明显负面作用。

DEVELOPMENT OF PROMOTER FOR SIMULTANEOUSLY REDUCING SOx EMISSIONS FROM FCC UNITS AND SULFUR IN NAPHTHA

Based on SOx transfer catalyst technology, a TRANSTAR promoter for simultaneously reducing SOx emissions from FCC units and sulfur content in naphtha was developed by incorporating active metal components for selective adsorption of sulfur-containing compounds in FCC naphtha and optimizing the components and pore structure of MgAl2O4. Adding composite metal oxides MO-V2O5 into SOx transfer catalyst could promote the transformation of sulfur-containing compounds in naphtha into coke, therefore the sulfur content of naphtha was reduced, as well as the catalyst ability to oxidation-adsorption and reduction-regeneration of SO2 was enhanced. The lab evaluation results showed that the sulfur content of FCC naphtha was declined when using TRANSTAR promoter to reduce the SOx emissions from flue gas significantly, furthermore, it seemed that the negative effect on product distributions could be omitted.