Method for preparing water gas shift catalyst, catalyst, application and process for reducing carbon monoxide content

• Main Authors: PONTES BITTENCOURT ROBERTO CARLOS, KITTET CRISTINA PONTES BIDANGU
• Format: Patent
• Language: Chinese; English
• Published: 04.04.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention provides a method for preparing a water gas shift catalyst, the catalyst, application and a process for reducing the content of carbon monoxide. The present invention relates to a catalyst suitable for the conversion of CO to CO2 and H2 by a water gas shift reaction. Such catalysts consist of iron oxide, zirconium oxide, cerium oxide or mixtures thereof, promoted by a platinum (Pt) content of 0.1 to 0.4% m/m based on the oxidizing material, and having a sodium (Na) content of less than 0.01% m/m. The invention makes it possible to obtain Pt with a high degree of dispersion, a catalyst with metal particles on the order of 1 nm and a preparation process for co-precipitating soluble salts in an aqueous medium by using ammonium hydroxide as a precipitating agent. 本发明提供了制备水煤气变换催化剂的方法、催化剂、用途和降低一氧化碳含量的工艺。本发明涉及适用于通过水煤气变换反应将CO转化为CO2和H2的催化剂。这样的催化剂由氧化铁、氧化锆、氧化铈或其混合物组成，基于氧化材料，通过0.1至0.4％m/m的铂(Pt)含量促进，并且具有低于0.01％m/m的钠(Na)含量。本发明使得有可能获得具有高分散度的Pt、具有1nm数量级的金属颗粒的催化剂以及通过使用氢氧化铵作为沉淀剂在水性介质中共沉淀可溶性盐的制备方法。