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A new route named as SDTO method for the synthesis of lightolefins from syngas has been proposed.That is to convert syngas todimethylether and then to convert dimethylether to light olefins.The catalystsfor the two conversion reactions have been developed.For the first reaction,the catulySt was synthesized by the combination of methanol synthesis catalystwith γ-Al_2O_3or zeolites which possesses both metallic and acidic functions.Thecatalyst for the second reaction was modified SAPO-34 molecular sieve.Thevariables of the reactions have also been investigated.The results from theserial connection of the two conversion steps without any separation show thatthe yield of C_2~-C_4~- olefins Could be>100g/(m~3 syngas).
A new route named as SDTO method for the synthesis of lightolefins from syngas has been proposed. It is to convert syngas todimethylether and then to convert dimethylether to light olefins. The catalysts for the two conversion reactions have been developed. For the first reaction, the catulySt was synthesized by the combination of methanol synthesis catalyst with γ-Al_2O_3 ze zeites which possesses both metallic and acidic functions. The catalyst for the second reaction was modified SAPO-34 molecular sieve.Thevariables of the reactions have also been investigated.The results from theserial connection of the two conversion steps without any separation show that the yield of C_2 ~ -C_4 ~ - olefins Could be> 100g / (m ~ 3 syngas).