Bifunctional coupling catalyst realizing medium-temperature hydrolysis conversion of carbonyl sulfide and deoxygenation and preparation method

Abstract

The invention discloses a bifunctional coupling catalyst realizing medium-temperature hydrolysis conversion of carbonyl sulfide and deoxygenation. Spherical activated alumina is used as a carrier; potassium carbonate and ammonium molybdate are separately used as raw materials to hydrolyze and convert carbonyl sulfide and remove an oxygen active component; the carrier is loaded with an active component by an equal volume co-impregnation method; then the carrier loaded with the active component is subjected to low-temperature drying, high-temperature activation, and medium-temperature vulcanization; and a catalyst with the ability of medium-temperature deoxygenation and the ability of hydrolysis conversion of carbonyl sulfide is prepared, wherein a carrier component of the catalyst is activeoxidation, a deoxygenation active component of the catalyst is molybdenum disulfide, and a hydrolysis conversion of carbonyl sulfide active component of the catalyst is potassium carbonate; the contents of the three catalyst components are as follows: 74-85wt.% of Al2O3, 10-15wt.% of K2CO3, and 5-11wt.% of MoS2; the catalyst is capable of simultaneously removing oxygen in a raw material gas and hydrolyzing and converting carbonyl sulfide, thereby avoiding a rapid decrease in hydrolysis activity of an active component of a catalyst for carbonyl sulfide hydrolysis under a moderate temperature condition due to oxygen poisoning.

Description

Technical field [0001] The invention relates to the field of medium temperature gas purification and catalyst preparation, in particular to a medium temperature hydrolytic conversion carbonyl sulfide and deoxygenation dual-function coupling catalyst and a preparation method thereof, which are applied to the clean conversion and utilization of fossil raw materials. Background technique [0002] The development and utilization of energy is the foundation of economic and social development. According to the BP 2016 World Energy Statistics, China is still the world's largest energy consumer. In my country's energy consumption structure, fossil energy-coal accounts for 64% of China's energy consumption structure. Although it has reached a historical low, it is still the dominant primary energy consumption in China. And for some time in the future, coal will still be used as the main energy resource in China. However, in the process of direct use of coal, while making a significant co...

AI Technical Summary

Problems solved by technology

CN1675337A contains O 2 There are two independent catalysts for removal and COS conversion, and the COS conversion catalyst is located in the O 2 Downstream of catalyst removal, mainly utilizing O 2 Removal of O from catalyst combustion gas 2 Prevent O 2 lead to a decrease in the activity of the COS conversion catalyst, but for O 2 The precious metal catalysts removed by combustion are expensive and easy to H 2 S poisoning, leading to overall performance degradation

Relevant literature shows that molybdenum-based catalysts with H 2 It has the ability to catalyze deoxidation under certain conditions, but in the published COS conversion catalyst patents, there is no indication of the invention of molybdenum in the catalyst's resistance to sulfur and oxygen poisoning

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