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.
Pd and /or Cu - La2O3/SiO2 catalysts were prepared by Pd and/or Cu supported on La2O3/SiO2 with impregnation The capacities of catalysts reduction and the performance of reaction were studied by H2-TPR and hydrogenation of CO2 The results of H2-TPR indicate that increasing the content of CuO is advantageous to the reduction of high dispersing CuO, but adding La2O3 hinder the reduction of high dispersing CuO It was found that Pd-Cu alloy formed while Pd, Cu impregnated on La2O3/SiO2 The results of hydrogenation of CO2 indicate that CO2 conversion is promoted by adding La2O3 increasing the content of CuO The thermal stablity of methanol formation was improved by adding La2O3 Aldehyde can be obtained when Pd-Cu were used as active components, and the production of methanol was related to the content of Pd loaded on the
