摘要
在固定床微反反应器上,对CO水合制低碳醇反应催化剂进行评价,通过对金属氧化物活性组份的筛选,发现Pb TiO3催化剂具有较佳的催化反应性能。考察了碱金属碳酸盐类助剂对反应活性的影响,实验结果表明,碱金属碳酸盐随溶解度的增加对反应的促进作用明显增加,产物中醇的总收率顺序为K2CO3>Na2CO3>Li2CO3;溶剂的作用与其碱性有密切关系,强碱性的有机多胺能够有效促进该反应,相对于非极性溶剂的醇收率2 0mg/g/h,在碱性溶剂中相同催化剂的活性最高可达到23 1mg/g/h。TPR结果表明,与PbO相比,PbTiO3在反应条件下不易被还原。另外,对反应机理也进行了初步探讨。
Performance of PbO and PbTiO3 on catalytic conversion of CO and H2O to alcohols was studied Moreover, The effect of alkali carbonate and solvents were investigated Experimental results showed that with the increase of the solubility of the alkali carbonate (K2CO3> Na2CO3> Li2CO3), the subsequent production of alcohols ranged from 20 mgg-1h-1 to 23 mgg-1h-1 The results also suggested that the effect of the solvents on PbTiO3 catalyst for catalytic conversion of CO and H2O to alcohols was very sensitive The catalytic activity was found to increase with the basicity of solvents At the same time, it was found that only under catalyst (PbTiO3 or PbO ) and alkali carbonate, could alcohols be detected In other words, without the catalyst or CO2-3 no product could be detected So the reaction mechanism of direct catalytic conversion of CO and H2O to alcohols was supposed to be that the combination of the carbonate recycle and formate catalytic decomposition results in the final alcohols synthesis TPR spectra revealed that compared with PbO, PbTiO3 could not be reduced readily under the reaction conditions
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2003年第2期5-8,18,共5页
Natural Gas Chemical Industry
基金
国家自然科学基金资助项目 (B0 60 1 0 5)
关键词
低碳醇
甲醇
乙醇
CO
水合
催化剂
alcohols
methanol
ethanol
carbon monoxide
hydration
catalyst
