摘要
采用XRD、NH3-TPD、比表面积和孔结构测定等手段,研究了在不同温度下用水蒸气处理时,MTP催化剂酸性质及孔结构的变化规律。结果表明,随着处理温度的提高,ZSM-5的结构未发生明显的变化;样品的总酸量下降很快,但弱酸分布量相对提高,而强酸分布量相对下降。提高处理温度,样品的BET比表面积、外比表面积和平均孔径减小,而微孔面积、介孔面积、微孔体积和介孔体积有增大的趋势。
Effect of hydrothermal treatment temperature on the acidic properties and pore structure of MTP catalyst was studied by XRD,NH3-TPD,specific surface area and pore structure.The results showed that there was no obvious change in the structure of ZSM-5as the improvement of hydrothermal treatment temperature.Meanwhile,total acidity of samples decreased rapidly,but the weak acid amounts increased,and the strong acid amounts decreased.The BET surface area,external surface area and average pore size of the sample decreased,while the micropore area,mesoporous area,micropore volume and mesoporous volume had a tendency to increase.
作者
关翀
王林
齐静
李云
颜蜀雋
宋彩霞
张伟
雍晓静
罗春桃
GUAN Chong;WANG Lin;QI Jing;LI Yun;YAN Shujun;SONG Caixia;ZHANG Wei;YONG Xiaojing;LUO Chuntao(Research & Development Center of Shenhua Ningxia Coal Industry Group, Yinchuan 750411, China)
出处
《化工技术与开发》
CAS
2017年第12期22-26,52,共6页
Technology & Development of Chemical Industry
关键词
ZSM-5分子筛
水蒸气处理
酸性质
孔结构
ZSM-5 zeolite
hydrothermal treatment
acidic properties
pore structure
