TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The first zeolite thin film comprises mesoporous zeolite crystals. The second zeolite thin film comprises mesoporous zeolite crystals. The metal-containing catalyst comprises a transition metal and/or a noble metal. The first and/or second zeolite thin films are on a support selected from ceramic spheres, monoliths and/or membranes. The support comprises ceramic foam. The first and/or second zeolite thin film comprises a metal-loaded zeolite.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The method involves: contacting feed components comprising biomass feedstock and alkane and/or alcohol feedstock with a metal-containing catalyst under conditions effective to form a first product comprising a bio-oil; and contacting the first product comprising the bio-oil with at least a first zeolite thin film under conditions effective to remove oxygen containing functional groups and provide a second product. The method further involves: contacting the second product with at least a second zeolite thin film under conditions effective to provide a fuel having a higher molecular weight than the second product. The method is a continuous process carried out in a single reactor. The method is performed under isothermal conditions. The method is performed under autothermal conditions. The method of forming the first product involves the bio-oil comprises catalytic partial oxidation. The biomass feedstock is impinged onto the metal catalyst by spraying, and reactive flash volatilization is carried out for 1 millisecond to 1 second. The spraying produces droplets and/or an aerosol, and the spraying is carried out by using a fuel injector, pressurized nozzle, fogger, and/or nebulizer. The biomass feedstock is volatilized before contacting the surface. The method further involves: contacting the first product with at least a second zeolite thin film under conditions effective to provide a fuel having a higher molecular weight than the first product. Preferred Components: The alkane feedstock comprises methane. The alcohol feedstock comprises ethanol. The biomass feedstock comprises a solid fuel. The biomass feedstock comprises a fluid fuel. The fluid fuel comprises a liquid and/or a gas. The biomass feedstock comprises a non-fossilized biomass. The non-fossilized biomass comprises animal biomass, plant biomass, and/or municipal waste biomass. The plant biomass comprises starch, cellulose, hemicellulose and/or lignin. The biomass feedstock comprises fossilized biomass. The fossilized biomass comprises coal and/or petroleum. EXAMPLE - No suitable example is given.