摘要
在实验室研究了ＭｎＯｘ 系列催化剂的干气选择氧化制乙烯的性能，考察了担载碱金属元素Ｋ、Ｌｉ及不同Ｌｉ盐对其性能的影响。结果表明，在８００ ℃时， ＭｎＯｘ 担载ＬｉＣｌ的催化剂乙烷转化率为７６．２％ ，甲烷表观转化率为２．５％ ，乙烯选择性为８２．９％ ，乙烯收率达６５．２％ ； ＭｎＯｘ 担载Ｌｉ２ ＳＯ４ 的催化剂乙烷转化率为８１．９％ ，乙烯选择性为７２．５％ ，乙烯收率为５９．４％ 。ＸＲＤ结果表明，ＭｎＯｘ 系列催化剂反应前主要是Ｍｎ２Ｏ３ ，反应后全部或部分被还原成ＭｎＯ。
A series of supported MnO x catalysts has been studied for selective oxidation of FCC dry gas to ethylene. The results showed that the conversion of ethane can be improved by support of Li or K on MnO x , if the MnO x supported by Li. LiCl/MnO x catalyst showed good performance for oxidation of FCC dry gas. Under the reaction temperature of 800 ℃, the conversion of methane and ethane was 2.5% and 76.2% respectively; the selectivity of ethylene was 82.9%; and the yield of ethylene was 65.2%. For Li 2SO 4/MnO x catalyst, the conversion of ethane was 81.9%; the selectivity and yield of ethylene was 72.5 % and 59.4% respectively. The XRD analysis displayed that the molecular formula of MnO x series catalysts before reaction was Mn 2O 3 and it was totally or partly reduced to MnO after reaction.
出处
《石油炼制与化工》
EI
CAS
CSCD
北大核心
2000年第1期19-23,共5页
Petroleum Processing and Petrochemicals
关键词
干气
选择氧化
催化剂
乙烯
炼厂气
氧化锰
dry gas
selective oxidation
oxidative dehydrogenation catalyst
lithium
ethylene
