CAJ | 학술논문

以沉淀法、水热合成法和浸渍法制备了磷酸锆催化剂，通过X射线衍射、热重分析、氮气物理吸附、红外光谱和Hammett指示剂法对催化剂进行了表征，并将该催化剂用于甘油气相脱水反应。研究表明，由沉淀法得到的磷酸锆经过400°C焙烧后能达到最佳催化活性，在温和条件下，甘油可完全转化，丙烯醛选择性为81%，反应24 h内催化剂失活不明显。不同方法制备的磷酸锆其结构和表面酸性显著不同，催化剂表面酸性对催化剂活性、丙烯醛选择性和催化剂的寿命均有较大影响。
이침정법、수열합성법화침지법제비료린산고최화제，통과X사선연사、열중분석、담기물리흡부、홍외광보화Hammett지시제법대최화제진행료표정，병장해최화제용우감유기상탈수반응。연구표명，유침정법득도적린산고경과400°C배소후능체도최가최화활성，재온화조건하，감유가완전전화，병희철선택성위81%，반응24 h내최화제실활불명현。불동방법제비적린산고기결구화표면산성현저불동，최화제표면산성대최화제활성、병희철선택성화최화제적수명균유교대영향。
Zirconium phosphates were prepared by precipitation, hydrothermal synthesis, and impregnation methods and were characterized by X-ray diffraction, thermogravimetric analysis, nitrogen adsorp-tion, Fourier transform infrared spectroscopy, and Hammett indicators. The different preparation methods have crucial effects on the texture and surface acidity of the zirconium phosphates. The zirconium phosphates were employed as catalysts for the gas phase dehydration of glycerol under mild reaction conditions. The zirconium phosphates from the precipitation method afforded the highest activity with the complete conversion of glycerol, 81% selectivity to acrolein, and no obvi-ous deactivation over 24 h. Surface acidic sites played an important role in the activity, selectivity to acrolein, and life of catalysts.