NOVELTY - A solid state pyrolysis catalyst composition comprises a calcined product formed from at least one pre-calcined hydrotalcite or hydrotalcite-like compound, layered dihydroxide and/or anionic clay, which has been impregnated or doped with salts, of a pair of metals selected from e.g. Ca and Ce, Ca and Cu, Mo and Zn, Mn and Y, and Ni and Y and calcined in the presence of free oxygen at at least one elevated temperatures after drying so that at least one oxide of at least a portion of at least one of pair of metals is converted into oxides.    USE - For producing at least one fluid hydrocarbon products from solid state biomass material; and for producing pyrolysis products (claimed).    ADVANTAGE - The catalyst composition can be adapted for producing pyrolysis products without any added air, molecular oxygen, molecular hydrogen, or liquid, from particulate or subdivided solid state biomass material which is untreated except for optional drying and/or size reduction; enables formation of gaseous products (carbon monoxide, carbon dioxide, and water) enriched in various ways; and provides pyrolysis oils having improved properties such as lower acidity, lower oxygen content, reduced corrosiveness, and desired carbon/hydrogen ratios.    DETAILED DESCRIPTION - A solid state pyrolysis catalyst composition comprises a calcined product formed from at least one pre-calcined hydrotalcite or hydrotalcite-like compound, layered dihydroxide and/or anionic clay, which has been impregnated or doped with salts, of a pair of metals selected from Ca and Ce, Ca and Cu, Ca and Fe, Ca and Mn, Ca and Y, Ca and Zn, Ce and Fe, Ce and Ni, Ce and Y, Cu and Nb, Fe and Y, Mo and Zn, Mn and Y, and Ni and Y and calcined in the presence of free oxygen at at least one elevated temperatures after drying so that at least one oxide of at least a portion of at least one of pair of metals is converted into oxides. INDEPENDENT CLAIMS are included for the following:    (1) producing (M1) at least one fluid hydrocarbon products from a solid state biomass material, involving (i) forming a mixture by bringing into contact under agitation in a pyrolysis reactor: a) particulate or subdivided solid state biomass material which is untreated except for optional drying and/or size reduction; b) a rehydrated impregnated or doped solid state calcined pyrolysis catalyst which as charged to the reactor is a calcined product comprising at least one calcined hydrotalcite or hydrotalcite-like compound, layered dihydroxide and/or anionic clay, impregnated or carrying (1) a single pair of metals, (2) at least one oxide of each of a single pair of the metals, or (3) a combination of at least one oxide of one or both of a single pair of metals and at least one free metal of one or both of a single pair of metals, where the calcined product is formed by calcining at least one pre-calcined hydrotalcite or hydrotalcite-like compound, layered dihydroxide, and/or anionic clay, that has been impregnated by or carries salts of the pair of metals, in the presence of free oxygen, and where the single pair of metals of (1), (2), or (3) is selected from Ca and Ce, Ca and Cu, Ca and Fe, Ca and Mn, Ca and Y, Ca and Zn, Ce and Fe, Ce and Ni, Ce and Y, Cu and Nb, Fe and Y, Mo and Zn, Mn and Y, Ni and Y; and c) a solid state particulate heat carrier; and (ii) fast or flash pyrolyzing at at least one temperature above 500 degrees C at least a portion of the mixture of (i) within the pyrolysis reactor and without any added air, added molecular oxygen, added molecular hydrogen, or added liquid diluent or carrier, to form fluid pyrolysis products;    (2) preparing (M2) a catalyst composition adapted for producing pyrolysis products without any added air, molecular oxygen, molecular hydrogen, or liquid, from particulate or subdivided solid state biomass material which is untreated except for optional drying and/or size reduction, involving a1) providing at least one solution which taken individually provides or which taken collectively provide a dissolved pair of metals, the solution(s) comprising solvent(s) which can be the same or different, and are vaporizable solvent(s), and the pair of dissolved metals of the solution is selected from Ca and Ce, Ca and Cu, Ca and Fe, Ca and Mn, Ca and Y, Ca and Zn, Ce and Fe, Ce and Ni, Ce and Y, Cu and Nb, Fe and Y, Mo and Zn, Mn and Y, and Ni and Y; and b1) impregnating a powdery or particulate hydrotalcite or hydrotalcite-like compound, layered dihydroxide and/or anionic clay, by incipient wetness using at least one of the solution of a1) above to form a wet mixture, drying the wet mixture to form a product mixture, and then calcining the product mixture in the presence of free oxygen;    (3) converting (M3) solid state biomass material into at least one fluid hydrocarbon products, involving introducing particulate or subdivided solid state biomass material which is untreated except for optional drying and/or size reduction into a pyrolysis reactor operating at a temperature of greater than 500 degrees C under fast or flash operating conditions, where the reactor contains a fluidized mixture of a calcined pyrolysis catalyst which as initially introduced into the reactor was a catalyst composition formed by the method (M2), and a solid state particulate heat carrier, where the method is conducted without any added air, any added molecular oxygen, any added molecular hydrogen, and/or any added liquid diluent or carrier.