Gasoline desulfurization by catalytic alkylation over silica-supported heteropolyacids: From model reaction to real feed conversion
Gasoline desulfurization by catalytic alkylation over silica-supported heteropolyacids: From model reaction to real feed conversion
复制标题
DOI：
10.1016/j.cattod.2007.08.017
复制
发表时间：
2008-01
期刊：
影响因子：
5.3
通讯作者：
Maria Arias;D. Laurenti;C. Geantet;M. Vrinat;Ito Hideyuki;Y. Yoshimura
中科院分区：
文献类型：
--
作者：
Maria Arias;D. Laurenti;C. Geantet;M. Vrinat;Ito Hideyuki;Y. Yoshimura
在 FCC 汽油中，硫化合物与进料中存在的烯烃进行烷基化，然后通过蒸馏消除它们，可能是脱硫的一个很好的替代方案。筛选用于 3-甲基噻吩 (3MT) 与 2-甲基-2-丁烯 (2M2B) 烷基化的酸性材料（沸石、负载酸），用作模型反应。结果表明，二氧化硅负载的12-磷钨酸（HPW）和12-硅钨酸（HSiW）是沸石和其他负载酸中最好的催化剂。然后在 FCC 汽油的实际进料中研究了 40HPW/SiO2 的性能。以高转化率生产了较重的硫化合物，并且与用作参考的二氧化硅负载磷酸（SPA-11）相比，该催化剂在反应 50 小时后仍表现出一定的活性。此外，通过提高反应温度可以减少失活。
In FCC gasoline, the alkylation of sulfur compounds with olefins present in the feed, followed by a distillation to eliminate them, could be a good alternative for the desulfurization. Acidic materials (zeolites, supported acids) were screened for the alkylation of 3-methylthiophene (3MT) with 2-methyl-2-butene (2M2B), used as model reaction. Results showed that the silica-supported 12-phosphotungstic (HPW) and 12-silicotungstic (HSiW) acids are the best catalysts among zeolites and other supported acids. The performance of 40HPW/SiO2was then studied in a real feed of FCC gasoline. The production of heavier sulfur compounds was obtained with high conversion, and this catalyst still showed some activity after 50h of reaction, as compared to the silica-supported phosphoric acid (SPA-11), used as a reference. Moreover the deactivation could be reduced by increasing the reaction temperature.