Ultrasound Assisted S ynthesis and Char acterizati on of Nan ostructure d MnNiSA PO-۳۴ Catalyst Used in MTO Process

The m ethanol to o lefins process is regard ed as a pow erful indirect technology to convert fossil resources to value added products [۱]. Am ong the Sil ica-Alumina-Phosphate molecular sieves, SAPO-۳۴ has r eceived much attention since it reveals higher selectivity for C۲-C۴ hydrocarbons [۲]. In this rese arch, we de veloped nanostructured MnNiSAPO-۳۴ catalyst via sono- chemical method to boo st the conversion and sta bility.Mate rials and m ethods:Aluminum isopropoxide was mixed with TEAOH (a s structure directing agent). After stirring for ۱. ۵ h, fumed silica, and phosphoric acid was add ed drop wi se to the mixture. Finally the sonicated and homogeneous gel with the portion of Al۲O۳/SiO۲/P۲ O۵/TEAOH/H۲O= ۱/۰.۳/ ۱/۳/۵۰ was heated in a hydrotherm al autoclav e for ۴۸ h ours. The crystallizatio n and morph ology of the prepared catalyst wer e character ized by XRD, and FESEM analysis, the conversion and selectivity we re considered in particular.

کلیدواژه ها:

Metha nol ، Olefins ، MTO ، MnNiSAPO-۳۴ ، Hydrothermal ، Ultraso und.