Carbonyl sulfide hydrolysis and preparation method thereof

Abstract

The invention relates to a carbonyl sulfide (COS) hydrolysis and a preparation method thereof; the hydrolysis is prepared by taking hydrotalcite like compound as a precursor and is used for low-temperature carbonyl sulfide hydrolysis; the invention is characterized in that: divalent metal saline solution and trivalent metal saline solution are mixed according to mole ratio, the mixed solution of sodium hydroxide and sodium carbonate is added by adopting a coprecipitation method, the crystallization temperature is 40-80 DEG C, the solution flow rate is controlled to be 3.6mL / min under being stirred, the sediment pH is controlled, and then filtration, washing, drying and baking are carried out to obtain derive composite oxide catalyst of the hydrotalcite like compound. The catalyst prepared by taking the hydrotalcite like compound as the precursor in the invention has obvious catalytic activity and high selectivity.

Description

technical field

[0001] The invention relates to a carbonyl sulfide (COS) hydrolysis catalyst and a preparation method thereof, in particular to a low-temperature carbonyl sulfide hydrolysis catalyst and a preparation method thereof, which are mainly used for removing carbonyl sulfide in raw material gas. Background technique

[0002] COS is the main form of organic sulfur in industrial gases. Trace amounts of COS in industrial production can easily cause catalyst poisoning and deactivation, and have a corrosive effect on industrial production equipment. In addition, COS emitted to the atmosphere without treatment can form SO 2 , promote photochemical reactions, and eventually transform into sulfate aerosols, causing serious environmental problems. Due to chemical activity ratio H 2 S is much smaller, its acidity and polarity are weaker than H 2 S, generally used to remove H 2 The method of S cannot completely remove COS effectively, so the removal of COS is the key to re...

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