Synthesis of SAPO-34 catalysts via controlled crystal growth

Introduction SAPO-34 is a silicoaluminophosphate zeolite with 8-membered ring windows (~0.38nm) displaying chabazite structure. SAPO-34 is an efficient catalyst showing improved catalytic performance in reactions such as methanol conversion to olefins [1], oxidative dehydrogenation of propane [2], conversion of light alkenes [3]. Its catalytic properties are mainly attributed to its mild acidity [4], high thermal stability [5] and excellent shape selectivity [3]. In addition, due to its unique cage size and shape, SAPO-34 has been found to be suitable for selective formation of linear hydrocarbons by restricting the formation and diffusion of branched hydrocarbons [1]. Herein we report the successful synthesis of high surface area and small crystal size SAPO-34 with improved surface properties using crystal growth inhibitors.