摘要:
The presently disclosed and/or claimed inventive concept(s) relates generally to retro-aldol reaction products and methods of making and using same. More particularly, but without limitation, the methods disclosed herein for producing the retro-aldol reaction products are performed in a non-aqueous/solvent-free based process. The reaction products obtained from the process include, for example, dihydroxyacetone, glyceraldehyde, glycolaldehyde, and combinations thereof. In one particular embodiment, the process of making such retro-aldol reaction products includes, without limitation, the step of mechanocatalytically reacting a heterogeneous catalyst with one or more sugar reactants.
摘要:
Provided are a metal-matrix integrated membrane catalyst for Fischer-Tropsch (F-T) synthesis, and preparation method thereof. The catalyst consists of a metallic integrated matrix, a molecular sieve membrane carrier, an active component Co and other adjuvants. The method comprises: pre-treating the metallic integrated matrix, and conducting in-situ growth of an SBA-16 molecular sieve membrane carrier, the thickness of the molecular sieve membrane carrier being 26-67 µm; and then loading the active component Co and other adjuvants on the molecular sieve membrane carrier via an impregnation method. The method of preparing the metal-matrix integrated membrane catalyst for the F-T synthesis comprises the following steps: pre-treating the metal-matrix; 2) pre-establishing well-chosen seed; 3) placing the pre-treated metallic integrated matrix in the SBA-16 molecular sieve synthesized solution, and conducting in-situ growth of the molecular sieve membrane carrier on the metallic integrated matrix; 4) impregnating, aging and calcinating the active component and adjuvant element; impregnating the metallic integrated matrix having the in-situ grown SBA-16 molecular sieve into the saline solution of the active component Co and other adjuvants, drying, aging, calcinating, and cooling to room temperature. The formed molecular sieve membrane has mechanical pressure resistance, and better firmness.
摘要:
A dehydrogenation catalyst is formed by forming a mixture comprising a bayerite aluminum hydroxide (Al(OH)3), a lanthanum (La) source, a cerium (Ce) source, a barium (Ba) source, a zirconium (Zr) source, and water into a shaped body. The shaped body is calcined at a temperature of at least 750 C to form a catalyst support. The catalyst support is treated with a dehydrogenation catalyst component to form a treated catalyst support containing the dehydrogenation catalyst component. The treated catalyst support is then calcined. The resulting catalyst composition may be used by contacting a paraffin hydrocarbon feed with a catalyst within a reactor in the presence of steam under dehydrogenation reaction conditions suitable to form dehydrogenated hydrocarbon products.
摘要:
The present invention provides a flue gas treatment method and a denitration and SO 3 reduction apparatus configured to efficiently reduce the concentration of SO 3 in a combustion flue gas and also efficiently reduce NO x in the combustion flue gas at treatment costs lower than those of conventional methods. The flue gas treatment method performs a treatment for reducing SO 3 into SO 2 by adding a compound including the elements H and C to a combustion flue gas including SO 3 as well as NO x in an oxygen atmosphere as a first additive, and then by bringing the combustion flue gas into contact with a catalyst including an oxide constituted by one or more of elements selected from the group consisting of Ti, Si, Zr, and Ce and/or a mixed oxide and/or a complex oxide including two or more of the elements selected from the group as a carrier.
摘要:
The present invention relates to cerium oxide particles that have excellent heat resistance especially useful for catalysts, functional ceramics, solid electrolyte for fuel cells, polishing, ultraviolet absorbers and the like, and particularly suitable for use as a catalyst or co-catalyst material, for instance in catalysis for purifying vehicle exhaust gas. The present invention also relates to a method for preparing such cerium oxide particles, and a catalyst, such as for purifying exhaust gas, utilizing these cerium oxide particles.
摘要:
L'invention concerne une composition à base d'oxydes de zirconium et de cérium dans un rapport atomique Zr/Ce > 1, et comprenant en outre de l'oxyde de lanthane et un oxyde d'une terre rare autre que le cérium et le lanthane, caractérisée en ce qu'après calcination 6 heures à 1150°C elle possède une surface spécifique d'au moins 10m 2 /g. La composition est obtenue en formant un mélange comprenant un sol d'un composé de zirconium et des composés de cérium, de lanthane et de ladite terre rare, en mettant en présence ce mélange et une solution d'un composé basique, en effectuant un chauffage et en calcinant le précipité ainsi obtenu. La composition peut être utilisée comme catalyseur.