The methanol conversion over HY zeolite was studied at 1 atm,280℃360℃.The effects of temperature,GHSV,and reaction time on the performance of reaction of methanol were discussed.The results showed that HY catalyst gave isoalkanes with high selectivity.Higher temperature（280℃340℃） and lower GHSV decreased the selectivity to dimethyl ether and increased that to C2,C3,i-C4,i-C5.With the further increase of temperature,the selectivity of C2,C3 increased while that to i-C4,i-C5 decreased.The selectivity to isoalkanes decreased quickly with the reaction time.
