A nanomaterial catalyst comprising a partially crystalline porous magnesium silicate support and gold nanoparticles, the catalyst being useful for oxidative cracking of hydrocarbons, specifically the production of light olefins from propane. Methods of producing the nanomaterial catalyst as well as a method of oxidative cracking of a hydrocarbon to produce light olefins are provided.

A nanomaterial catalyst comprising a partially crystalline porous magnesium silicate support and gold nanoparticles, the catalyst being useful for oxidative cracking of hydrocarbons, specifically the production of light olefins from propane. Methods of producing the nanomaterial catalyst as well as a method of oxidative cracking of a hydrocarbon to produce light olefins are provided.

A method for preparing a copper-containing catalyst is described comprising the steps of: (a) combining an acidic copper-containing solution with a first basic precipitant solution in a first precipitation step to form a first precipitate, (b) combining an acidic aluminium-containing solution, further comprising one or more metal compounds selected from copper compounds, zinc compounds and promoter compounds, with a second basic precipitant solution in a second precipitation step to form a second precipitate, (c) contacting the first and second precipitates together in a further mixing step to form a catalyst precursor, and (d) washing, drying and calcining the catalyst precursor to form the copper-containing catalyst, wherein a silica precursor is included in the first precipitation step, the second precipitation step or the precipitate mixing step, to provide a catalyst with a silica content, expressed as S102, in the range of 0.1 to 5.0 wt%.

A method for preparing a copper-containing catalyst is described comprising the steps of: (a) combining an acidic copper-containing solution with a first basic precipitant solution in a first precipitation step to form a first precipitate, (b) combining an acidic aluminium-containing solution, further comprising one or more metal compounds selected from copper compounds, zinc compounds and promoter compounds, with a second basic precipitant solution in a second precipitation step to form a second precipitate, (c) contacting the first and second precipitates together in a further mixing step to form a catalyst precursor, and (d) washing, drying and calcining the catalyst precursor to form the copper-containing catalyst, wherein a silica precursor is included in the first precipitation step, the second precipitation step or the precipitate mixing step, to provide a catalyst with a silica content, expressed as S102, in the range of 0.1 to 5.0 wt%.

Provided is an exhaust gas purification catalyst capable of reducing a noble metal amount while maintaining a catalyst performance, which comprises a substrate and at least three catalyst coating layers formed on the substrate, the first and third catalyst coating layers contain Pd as a catalyst metal and are formed in a range of a predetermined length from an upstream end surface in an exhaust gas flow direction, and the second catalyst coating layer contains Rh as a catalyst metal and is formed in a range of a predetermined length from a downstream end surface in the exhaust gas flow direction.

Provided is an exhaust gas purification catalyst capable of reducing a noble metal amount while maintaining a catalyst performance, which comprises a substrate and at least three catalyst coating layers formed on the substrate, the first and third catalyst coating layers contain Pd as a catalyst metal and are formed in a range of a predetermined length from an upstream end surface in an exhaust gas flow direction, and the second catalyst coating layer contains Rh as a catalyst metal and is formed in a range of a predetermined length from a downstream end surface in the exhaust gas flow direction.

Metal oxides-silica composite materials are synthesized by a co-precipitation method to serve as modified catalysts for converting ethanol into four-carbon hydrocarbons. The method includes mixing a liquid-phase silicon source and a metal precursor at different ratios so as to change the acid-base composition of the composite materials and thereby increase selectivity with respect to the four-carbon products.

Redox catalysts having surface medication, methods of making redox catalysts with surface modification, and uses of the surface modified redox catalysts are provided. In some aspects, the redox catalysts include a core oxygen carrier region such as CaMnO.sub.3, BaMnO.sub.3−δ, SrMnO.sub.3−δ, Mn.sub.2SiO.sub.4, Mn.sub.2MgO.sub.4−δ, La.sub.0.8Sr.sub.0.2O.sub.3−δ, La.sub.0.8Sr.sub.0.2FeO.sub.3−δ, Ca.sub.9Ti.sub.0.1Mn.sub.0.9O.sub.3−δ, Pr.sub.6O.sub.11−δ, manganese ore, or a combination thereof; and an outer shell having an average thickness of about 1-100 monolayers surrounding the outer surface of the core region. The outer shell can include, for example a salt selected such as Li.sub.2WO.sub.4, Na.sub.2WO.sub.4, K.sub.2WO.sub.4, SrWO.sub.4, Li.sub.2MoO.sub.4, Na.sub.2MoO.sub.4, K.sub.2MoO.sub.4, CsMoO.sub.4, Li.sub.2CO.sub.3, Na.sub.2CO.sub.3, K.sub.2CO.sub.3, or a combination thereof.

Redox catalysts having surface medication, methods of making redox catalysts with surface modification, and uses of the surface modified redox catalysts are provided. In some aspects, the redox catalysts include a core oxygen carrier region such as CaMnO.sub.3, BaMnO.sub.3−δ, SrMnO.sub.3−δ, Mn.sub.2SiO.sub.4, Mn.sub.2MgO.sub.4−δ, La.sub.0.8Sr.sub.0.2O.sub.3−δ, La.sub.0.8Sr.sub.0.2FeO.sub.3−δ, Ca.sub.9Ti.sub.0.1Mn.sub.0.9O.sub.3−δ, Pr.sub.6O.sub.11−δ, manganese ore, or a combination thereof; and an outer shell having an average thickness of about 1-100 monolayers surrounding the outer surface of the core region. The outer shell can include, for example a salt selected such as Li.sub.2WO.sub.4, Na.sub.2WO.sub.4, K.sub.2WO.sub.4, SrWO.sub.4, Li.sub.2MoO.sub.4, Na.sub.2MoO.sub.4, K.sub.2MoO.sub.4, CsMoO.sub.4, Li.sub.2CO.sub.3, Na.sub.2CO.sub.3, K.sub.2CO.sub.3, or a combination thereof.

A process of manufacture of a solid catalyst made of a support coated with a thin catalytic layer and a process for eliminating gaseous and/or particulate pollutants in an exhaust gas. The process of manufacture includes preparing a solution A by dissolving alkoxide and/or chloride precursors of at least one metal selected from Al, Si, Ti, Zr, Fe, Zn, Nb, V and Ce in a solvent S1, preparing a solution B containing a surfactant, an organic acid, and/or hydrochloric acid (HCl) in a solvent S2, mixing solution A and solution B together, thereby obtaining a washcoat solution C, and dip-coating, drying, and calcinating the support into washcoat solution C. The processes provide for elimination of volatile organic compounds (VOCs), CO, and/or particulate pollutants in an exhaust gas.