摘要
采用浸渍法制备了柠檬酸改性的H-β沸石催化剂,采用X射线衍射、X射线荧光、红外光谱、核磁共振和程序升温脱附方法对催化剂进行了表征,并考察了催化剂对2-(4′-乙基苯甲酰基)苯甲酸(EBA)脱水合成2-乙基蒽醌(EAQ)反应的催化性能.结果表明,经柠檬酸改性没有破坏H-β沸石的骨架结构,但其酸量明显减少.柠檬酸浸渍改性后未经水洗的催化剂上有较多的非骨架铝及柠檬酸残留;水洗至中性的催化剂在EBA脱水合成EAQ反应中有较好的催化性能,EBA转化率可高达96.5%,EAQ选择性可高达96.0%.
H-β zeolite catalyst samples were prepared by impregnation with citric acid and were characterized by X-ray diffraction, X-ray fluorescence, Fourier transform infrared spectroscopy, nuclear magnetic resonance, and temperature-programmed desorption. The catalytic performance of the catalyst samples for dehydration of 2-（4＇-ethylbenzoyl）benzoic acid （EBA） to 2-ethylanthraquinone （EAQ） was measured. The results showed that the impregnated samples remained the topological structure of H-β zeolite. There was more residual extra-framework aluminum and citric acid on the unwashed sample after impregnation. The sample washed with deionized water after impregnation exhibited high activity and selectivity in the reaction of EBA dehydration. The conversion of EBA was 96.5 %, and the selectivity for EAQ was 96.0 %
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2008年第8期701-704,共4页
基金
新世纪优秀人才支持计划(NCET-04-0268)
高等学校学科创新引智计划(“111”计划).
