CO sulfur resistant transformation catalyst and its preparation method

Abstract

An isothermal S-resistant conversion catalyst used for the isothermal conversion process where CO reacts on water vapor to generate H2 and CO2 for preparing synthetic ammonia gas, H2, city gas and synthetic carbonyl gas is prepared from the composite carrier containing TiO2, MgO, Al2O3 and cement and non-alkali metal as promoter through improved kneading and dipping. Its advantages are high activity, high mechanical strength, adaptability to high space velocity, good resistance to hydration, and no environmental pollution.

Description

technical field [0001] The invention relates to a sulfur-resistant shift catalyst for producing hydrogen and carbon dioxide by reacting carbon monoxide and water vapor and a preparation method thereof. Background technique [0002] As we all know, in the manufacturing process of hydrogen-rich gas, CO conversion plays a decisive role. The conversion reaction of carbon monoxide and water vapor to produce hydrogen and carbon dioxide requires a catalyst. The early shift catalysts were mainly based on Fe-Cr and Cu-Zn systems, which are the so-called "medium temperature shift" and "low temperature shift". But these catalysts are only active under sulfur-free or low-sulfur (medium shift) conditions. In the late 1960s, in order to convert heavy oil, coal or residual oil as the raw material of high-sulfur syngas, Co-Mo series sulfur-tolerant shift catalysts appeared. Since the 1980s, the development of heavy oil, especially coal gasification technology has successfully promoted th...

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Problems solved by technology

The catalyst has high strength but poor dispersion of active components and additives, so low temperature activity is not high