Catalyst and method for preparing low aromatic hydrocarbon liquid fuel through direct conversion of syngas

A catalyst, wherein the catalyst comprises a component I and a component II;

• the component I and the component II are compounded in a mechanical mixing mode;
• an active ingredient of the component I is a metal oxide;
• the component II is a zeolite with one-dimensional ten-membered ring porous channel;
• the metal oxide is at least one of MnOx, MnCryO(x+1.5y), MnAlyO(x+1.5y), MnZryO(x+2y), MnInyO(x+1.5y), ZnO, ZnCryO(1+1.5y), ZnAlyO(1+1.5y), ZnGayO(1+1.5y), ZnInyO(2+1.5y), CeO2, CoAlyO(1+1.5y), FeAlyO(1+1.5y), Ga2O3, Bi2O3, In2O3, InyAlzMnO(x+1.5y+1.5z), and InyGazMnO(x+1.5y+1.5z);
• a value range of x is 1-3.5;
• a value range of y is 0.1-10;
• and a value range of z is 0.1-10;
• a specific surface area of MnOx, ZnO, CeO2, Ga2O3, Bi2O3, and In2O3 is 1-100 m2/g;
• a specific surface area of MnCryO(x+1.5y), MnAlyO(x+1.5y), MnZryO(x+2y), MnInyO(x+1.5y), ZnCryO(1+1.5y), ZnAlyO(1+1.5y), ZnGayO(1+1.5y), ZnInyO(2+1.5y), CoAlyO(1+1.5y), FeAlyO(1+1.5y), InyAlzMnO(x+1.5y+1.5z), and InyGazMnO(x+1.5y+1.5z) is 5-150 m2/g;
• wherein the zeolite has a topology structure of TON or AEL or MTT or MRE, and a skeleton element composition of the zeolite is at least one of Si—O, Si—Al—O, Si—Al—P—O, Al—P—O, Ga—P—O, Ga—Si—Al—O, Zn—Al—P—O, Mg—Al—P—O, and Co—Al—P—O;
• wherein the zeolite of the AEL topology has 0.05-0.5 mol/kg medium-strength acid sites;
• the zeolite of each of the TON, MTT, and MRE topology has 0.005-0.6 mol/kg medium-strength acid sites:
• wherein a peak temperature range corresponding to the desorption peak of NH3-TPD (temperature programmed desorption) for medium-strength acid is 200-500° C.;
• and by using acetone as a probe molecule, a chemical displacement of 13C-NMR is in a range of 210-220 ppm.