Method for preparing catalyst for preparing synthesis gas by reforming methane and carbon dioxide

Abstract

The invention relates to a method for preparing a catalyst for preparing synthesis gas by reforming methane and carbon dioxide, which comprises the following steps: soaking a carrier into a mixed solution of cerium(III) nitrate and lanthanum nitrate, and drying and roasting the soaked carrier for 2 to 10 hours to obtain a modified carrier (A); soaking the (A) into a soluble nickel salt solution orsoaking the (A) into a chloroplatinic acid solution, and drying and roasting the soaked carrier to obtain (B) or (C); soaking the (B) into the chloroplatinic acid solution or soaking the (C) into thesoluble nickel salt solution, and drying and roasting the soaked carrier to obtain a catalyst precursor, or soaking the modified carrier into a mixed solution of the soluble nickel salt solution andthe chloroplatinic acid, and drying and roasting the soaked carrier to obtain a catalyst precursor; and reducing the precursor in hydrogen and nitrogen mixed gas to obtain the catalyst. The catalyst has the advantages of low cost, good catalytic activity under the reaction condition of large space velocity, high selectivity for H2 and CO, and good sintering resistance and carbon deposition resistance.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for preparing synthesis gas by reforming methane-carbon dioxide. Background technique [0002] The main component of natural gas - methane is a high-quality and clean energy source. With the change of the world's energy structure, natural gas will become one of the most important energy sources in the 21st century. The chemical application of natural gas is mainly achieved through the preparation of synthesis gas, that is, the production of synthesis gas from natural gas is the "leading" step in the natural gas chemical industry. Natural gas catalytic conversion to synthesis gas mainly includes steam reforming, carbon dioxide reforming, partial oxidation of methane and mixed reforming processes. Natural gas-steam reforming to synthesis gas is a very mature technology route, which is widely used in industrial hydrogen production process, but the process consumes a lot of energy and has a high ...

AI Technical Summary

Problems solved by technology

The noble metal system is to support the active component noble metals (Pt, Pd, Rh, Ru, Ir) on alumina, silica, magnesia, zirconia, titania and other supports. The advantage of this system is that it has good anti-coking performance, but the reaction performance is slightly low, and the cost is expensive; the non-noble metal system is nickel or cobalt loaded on alumina, silica, magnesia, zirconia, titania and other carriers, and rare earth metal oxides can be used for modification to Improve the reaction performance of the catalyst. The advantage of this system is that it has good reaction performance and low catalyst preparation cost, but the catalyst has low carbon deposition resistance. The catalyst is often deactivated due to carbon deposition, sintering or loss of active components, thus Affects the industrial application process of the process