燃料化学学报2011，Vol.39Issue(11)：850-855,6.
F-Nb摩尔比对F-Nb/HZSM-5催化剂催化乙醇脱水性能的影响
Effects of F/Nb mol ratio of F-Nb/HZSM-5 catalyst on the catalytic performance for ethanol dehydration to ethylene
摘要
Abstract
The structures and surface acidities of F-Nb/HZSM-5 catalysts with different F/Nb mol ratio were studied using BET, NH3-TPD, FT-IR, MAS-NMR and SEM. The catalytic performance of these catalysts for ethanol dehydration to ethylene was evaluated and correlated with the characterization results. It is found that, dealumination of HZSM-5 occurred after modification and the depth of dealumination increased with the increase of the amount of F added. The extra-framework aluminum species were observed by 27A1 MAS NMR with a signal appeared at -13. 5. With the increase of F/Nb mol ratio, both weak and strong acid amounts decreased and a new strong acid site was found in the NH3-TPD profile at 500 t. The catalyst with F/Nb mol ratio of 0.7 gave the highest catalytic activity and selectivity. The stability of the catalyst was greatly improved by the addition of F-Nb.关键词
氧化铌/氟化铵/HZSM-5分子筛/固体酸催化剂/乙醇/乙烯/脱水Key words
niobium oxide/ ammonium fluoride/ HZSM-5 molecular sieve/ solid acid catalyst/ ethanol/ ethylene/ dehydration分类
石油、天然气工程引用本文复制引用
李宁,陆翠云,许冬生,胡燚 ,韩毓旺..F-Nb摩尔比对F-Nb/HZSM-5催化剂催化乙醇脱水性能的影响[J].燃料化学学报,2011,39(11):850-855,6.基金项目
国家高技术研究发展计划(863计划,2006AA020101) （863计划,2006AA020101）
国家科技支撑计划重点资助项目(2006BAE02B04). （2006BAE02B04）
