天然气化工(C1化学与化工)2018，Vol.43Issue(2)：19-23,5.
共沉淀反应酸碱比对CuFe合成低碳醇催化剂性能的影响
Effect of acid-base ratio in the process of coprecipitation reaction on copper-iron based catalysts for synthesis of higher alcohols
李导 1舒歌平 1李克健 1王洪学1
作者信息
- 1. 中国神华煤制油化工有限公司上海研究院,上海201108
- 折叠
摘要
Abstract
The CuFeMn/Zr catalysts for higher alcohols synthesis were prepared by coprecipitation methods with different acid-base ratios. The texture and structure properties of these catalysts were characterized by ICP, BET, XRD and TPR. The results showed that the way of determining the dosage of alkali by controlling the Ph value is not feasible, and the coprecipitation reaction according to acid-base ratio can greatly improve the preparation repeatability. Under the reaction conditions of T=533K, P=5.0MPa, GHSV=4900h-1and n(H2)/n(CO)=1.77, the catalysts prepared in the acid-base mole ratios of 1:1 to 1:1.1 exhibited better performance. Especially,when the acid-base mole ratio was 1:1.1,the catalyst had the highest space time yield and selectivity of total alcohols and the lowest selectivity of CO2. The XRD results showed that the catalyst prepared by the coprecipitation reaction of the multi components has higher dispersion and no obvious crystal form. The BET results showed that the smaller the amount of alkali in the precipitant, the larger the specific surface area and the richer the pore structure. The TPR study found that the increase in the amount of alkali during the preparation makes it more difficult to reduce the Cu species and Fe species in the catalyst.关键词
低碳醇/CO加氢/催化剂制备/共沉淀反应/酸碱比Key words
higher alcohols/CO hydrogenation/catalyst preparation/coprecipitation/acid-base ratio分类
化学化工引用本文复制引用
李导,舒歌平,李克健,王洪学..共沉淀反应酸碱比对CuFe合成低碳醇催化剂性能的影响[J].天然气化工(C1化学与化工),2018,43(2):19-23,5.
