物理化学学报Issue(6)：1163-1168,6.DOI:10.3866/PKU.WHXB201404081
磷酸铝负载钾催化剂表面酸碱性质对邻苯二酚O-单醚化催化性能的影响
Influence of Acid-Base Properties of K-Loaded Aluminophosphate Catalysts on Their Catalytic Behavior in the O-Methylation of Catechol
摘要
Abstract
K-loaded aluminophosphates prepared by impregnation were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, N2 adsorption, and NH3 as wel as CO2 temperature-programed desorption (NH3-TPD, CO2-TPD). The results show that potassium was highly dispersed on the surface of the aluminophosphates. The amount of surface acidic and basic sites decreased upon adding a smal amount of potassium. With an increase in potassium, the amount of surface acid sites decreased and the amount of surface base sites did not obviously change. Vapor-phase O-methylation of catechol with methanol was carried out to investigate the catalytic performance of the K-loaded aluminophosphates. Selectivity toward guaiacol obviously increased when a smal amount of potassium was added. With an increase in the potassium content, selectivity toward guaiacol increased further and the conversion of catechol decreased. Combined with the characterization results, the surface weak acidic sites play an important role in improving the conversion of catechol and the surface weak basic sites are suitable for improving selectivity toward guaiacol.关键词
磷酸铝/邻苯二酚/愈创木酚/弱酸弱碱/钾负载Key words
Aluminophosphate/Catechol/Guaiacol/Weak acid and base/K-loading分类
化学化工引用本文复制引用
刘钢,杨录新,吴淑杰,贾明君,张文祥..磷酸铝负载钾催化剂表面酸碱性质对邻苯二酚O-单醚化催化性能的影响[J].物理化学学报,2014,(6):1163-1168,6.基金项目
The project was supported by the National Natural Science Foundation of China (21003059), Development Project of Science and Technology of Jilin Province, China (20130101014JC), and Fundamental Research Funds for the Central Universities, China.国家自然科学基金(21003059),吉林省科技发展计划(20130101014JC)和中央高校基本科研业务费专项资金资助项目 （21003059）
