摘要
合成气制甲醇有三类催化剂．第一类是含贵金属的催化剂［１］，由于其成本高，流失严重，回收困难等，致使工业上使用受到限制．第二类是Ｎｉ系催化剂［２～４］，由于在使用时极易生成剧毒的Ｎｉ（ＣＯ）４化合物，既危害操作人员健康又污染环境，故工业上已逐渐弃用．第...
Ultrafine copper chromium oxide catalyst was prepared by using copper ammonia complex solution precipitation method, and the catalytic activity and selectivity were evaluated at low temperature (≤110℃) and low pressure (≤6 0 MPa) in liquid phase. Effects of various preparation conditions on the performance of catalyst were examined, and the optimum preparation conditions were determined. The results demonstrated that the catalyst not only has higher catalytic activity (the space time yield of methanol is more than 98 g/(L·h)), but also has higher selectivity for methyl formate (more than 20%). The particle size of Cu Cr oxide catalyst is less than 50 nm, and its specific surface area is as high as 98 6 m 2/g. The catalyst has excellent mobility and lighter apparent density. Of all factors, the pH value during precipitation and Cu/Cr molar ratio as well as ambient atmosphere for thermal decomposition have more remarkable influence on the catalyst activity.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
1999年第1期81-84,共4页
基金
国家科委资助项目
关键词
合成气
甲醇
甲酸甲酯
铜
铬
催化剂
超细粉
syngas, methanol, methyl formate, copper, chromium, oxide catalyst, ultrafine powder
