▎ 摘　　要

NOVELTY - Catalyst is composite catalyst (I) and (II), where the component (I) and component (II) are composited in a mechanical mixing manner, the active ingredient of component (I) is a metal oxide, the component (II) is an X-type molecular sieve modified with alkali metal cesium, the metal oxides are manganese oxide, manganese chromium oxide, manganese aluminum oxide, manganese zirconium oxide, manganese indium oxide, zinc oxide, zinc chromium oxide, zinc aluminum oxide, zinc gallium oxide, zinc indium oxide, cerium dioxide, cerium zirconium oxide, cobalt aluminum oxide, ferric aluminum oxide, indium (III) oxide, indium aluminum manganese oxide and indium gallium manganese oxide, the specific surface area of the manganese oxide, zinc oxide, cerium dioxide, indium(III) oxide is 1-100 m2/g, and the specific surface area of the remaining metal oxide compounds is 5-150 m2/g. USE - The catalyst is useful for preparing ethylbenzene by directly converting catalytic synthesis gas and toluene. ADVANTAGE - The catalyst has high product yield and selectivity of aromatics of 40-80%, and increases proportion of ethylbenzene in aromatics to 50-90%. DETAILED DESCRIPTION - Catalyst is composite catalyst (I) and (II), where the component (I) and component (II) are composited in a mechanical mixing manner, the active ingredient of component (I) is a metal oxide, the component (II) is an X-type molecular sieve modified with alkali metal cesium, the metal oxides are manganese oxide of formula: MnOx, manganese chromium oxide of formula: MnxCryO(x+1.5y), manganese aluminum oxide of formula: MnxAlyO(x+1.5y), manganese zirconium oxide of formula: MnxZryO(x+2y), manganese indium oxide of formula: MnxInyO(x+1.5y), zinc oxide, zinc chromium oxide of formula: ZnCryO(1+1.5y), zinc aluminum oxide of formula: ZnAlyO(1+1.5y), zinc gallium oxide of formula: ZnGayO(1+1.5y), zinc indium oxide of formula: ZnInyO(2+1.5y), cerium dioxide, cerium zirconium oxide of formula: CeZryO2, cobalt aluminum oxide of formula: CoAlyO(1+1.5y), ferric aluminum oxide of formula: FeAlyO(1+1.5y), indium (III) oxide, indium aluminum manganese oxide of formula: InyAlzMnO(1+1.5y+1.5z), and indium gallium manganese oxide of formula: InyGazMnO (1+1.5y+1.5z), the specific surface area of the manganese oxide, zinc oxide, cerium dioxide, indium(III) oxide is 1-100 m2/g, and the specific surface area of the manganese chromium oxide, manganese aluminum oxide, manganese zirconium oxide, manganese indium oxide, zinc oxide, zinc chromium oxide, zinc aluminum oxide, zinc gallium oxide, zinc indium oxide, cerium zirconium oxide, cobalt aluminum oxide, ferric aluminum oxide, indium aluminum manganese oxide, and indium gallium manganese oxide is 5-150 m2/g. x = 1-3.5; y = 0.1-10;and z = 0.1-10. An INDEPENDENT CLAIM is included for a method for preparing ethylbenzene by directly converting synthesis gas and toluene involving using syngas and toluene as raw materials for conversion reaction in a fixed bed, a fluidized bed or a moving bed using the catalyst.