THE PREPARATION OF HZSM-5 MOLECULAR SIEVE MEMBRANE FOR METHANOL DEHYDRATION TO DIMETHYL ETHER

摘要

Introduction DME is a low-emission and environmental friendly energy source, it has shown promise in replacing for diesel fuel.But the high cost of DME has seriously restricted its popularized and applied. Catalyst is the key to obtain the high yield and cost-effective DME. Early test results indicate that a high conversion and selectivity for DME can be obtained with pellet molecular sieve (HZSM-5) at 200℃. However, the expensive price, the difficulties in forming and deactivation owing to coke deposition in reaction limited this catalyst amplification. The object of this study is the development of a catalyst which has a high yield of DME and easy scale-up.