摘要
常规方法制备的RFS-1硫转移剂MgO含量较低且磨损指数较差,采用铈化合物全部加入成胶过程的方法制备的RFS-2及采用铈化合物全部加入浸渍过程的方法制备的RFS-3硫转移剂在提高MgO含量的前提下保证了催化剂的抗磨损性能,并采用XRF、XRD、DTA、BET、XPS、SEM、TEM等分析手段及FCC再生烟气脱硫性能评价实验对3种不同制备方法得到的硫转移剂进行表征和性能考察。结果表明:RFS-3为MgAl 2O 4表面负载金属CeO 2且富集MgO的结构、镁铝尖晶石晶体结晶保留度高,具有较为优良的热稳定性、孔道结构及表面、体相元素分布状态;具有较好催化剂外观形貌,且催化剂球形度好、破损黏联少;烟气脱硫效果最好,吸附时间500 s之内烟气SO 2体积分数最低,且烟气脱硫效果及性能保留时间最长。
The sulfur-transfer catalysts prepared by conventional method show low MgO content and poor intensive index, while the cerium modified sulfur-transfer catalysts RFS-2 and RFS-3, with different cerium compounds adding, ensure both excellent intensive index and high MgO content. Sulfur transfer catalysts prepared by three different ways were characterized by XRF, XRD, DTA, BET, XPS, SEM, TEM methods, and evaluated by the desulfurization of regeneration flue gas. The results show RFS-3 is of highly crystalline MgO and MgAl 2O 4 crystal type with CeO 2 loaded on the surface. RFS-3 has higher thermal stability, larger surface area, and better pore structure and bulk element distribution than others. It also has good catalyst external appearance, sphericity, sticky contacting and low broken index. It shows excellent flue gas desulfurization performance, of ultra-low SO 2 volume fraction in flue gas within 500 s, and long flue gas desulfurization lifetime.
作者
张杰潇
张万虹
宋海涛
田辉平
李家兴
ZHANG Jiexiao;ZHANG Wanhong;SONG Haitao;TIAN Huiping;LI Jiaxing(Research Institute of Petroleum Processing, SINOPEC, Beijing 100083, China)
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2019年第3期548-554,共7页
Acta Petrolei Sinica(Petroleum Processing Section)
关键词
硫转移剂
镁铝尖晶石
氧化铈
制备方法
sulfu-transfer catalyst
magnesia alumina spinel
cerium oxide
preparation method
