摘要
采用沉积沉淀法制备了负载型Au/γ-Al2O3催化剂,并进行了BET、SEM等表征.对高浓度甲醇蒸汽进行催化消除反应.探讨了载体粒径、金含量和活化气体(O2、N2、H2)对催化剂性能的影响.结果表明:载体粒径不同的催化剂表面积不同,不同的活化气体对反应产物有很大影响.在O2活化的最佳催化剂Au(2.0%)/γ-Al2O3(0.4-0.5mm)上浓度为86.3g/m3的甲醇的最低全转化温度是170℃,产物中CO2和甲醚的选择性分别为99.7%和0.3%,达到国家安全排放标准.图1,表3,参16.
The supported Au/γ-Al2O3 catalysts were prepared by deposition-precipitation method. Catalytic elimination of methanol vapor was carried out.The effects of the diameter of carrier, the gold contents and pretreated gases （O2, N2, H2） on activity of the catalysts were studied. Results show that the surface area of catalysts supported on different diameter of carrier is not the same value, the difference of pretreated gases has great influence on the products of methanol. Over the optimum catalyst Au （2%）/γ-Al2O3（0.4-0.5 mm） pretreated by O2, the lowest temperature at which methanol （86.3 g/m^3） has the total conversion is 170℃ , the selectivity of CO2 and methyl ether is 99.7% and 0.3% respectively, which attains the national security exhaustion standard, 1fig., 3tabs., 16refs.
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2006年第3期77-80,共4页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
湖南省自然科学基金资助项目(05JJ30143)
