摘要
应用催化反应色谱技术在常压523—563K条件下研究Mo催化剂制备参数对噻吩吸附平衡常数K_A、吸附热ΔH、吸附速度常数k_α的影响。结果表明,噻吩在载Mo量相同(7.5w％)的Mo/Al_2O_3、Mo/SiO_2、Mo/TiO_2催化剂上的K_A、ΔH、k_α值明显不同,每m^2催化剂表面积上K_A值大小顺序为:Mo/TiO_2>Mo/Al_2O_3>Mo/SiO_2;ΔH的大小顺序则相反。在Mo/Al_2O_3催化剂上,当载MoO_3量由5％增到12％,K_A和ΔH几乎没有改变;而Mo/SiO_2催化剂的K_A明显增加。当焙烧温度由673K升到873K,硫化温度由603K升到743K时,都将导致Mo/Al_2O_3催化剂上K_A值下降,其中焙烧温度影响更为突出。
The effect of preparative variables of catalysts on the adsorption equilibrium, adsorption heat and adsorption rate coefficient were studied by CRCT at atmospheric pressure and 523—563K.The results showed that the K_A,ΔH and k. values of thiophene on Mo/Al_2O_3, Mo/SiO_2 and Mo/TiO_2 catalyst with the same Mo content were quite different. K_A values expressed in per surface area of catalyst were in the order of Mo/TiO_2>Mo/Al_2O-3>Mo/SiO_2, Whereas for ΔH values a reverse order was true. When the Mo content increased from 5％ to 12％, K_A and AH kept constant for Mo/At_2O_3, but increased significantly for the K_A value on Mo/SiO-2.K_A went down with increasing sulphurization temperature, especially with increasing calcination temperature.
出处
《石油化工》
CAS
CSCD
北大核心
1992年第8期544-548,共5页
Petrochemical Technology
