Research progress on catalysts for organic sulfur hydrolysis: Review of activity and stability

The removal of organic sulfur through catalytic hydrolysis is a significant area of research in the field of desulfurization. This review provides an overview of recent advancements in catalytic hydrolysis technology of organic sulfur, including the activity, stability, and atmosphere effects of hydrolysis catalysts. The emphasis is on strategies for enhancing hydrolysis activity and anti-oxygen poisoning property of catalysts. Surface modification, metal doping and nitrogen doping have been found to improve the activity of catalysts. Alkaline components modification is the most commonly used method, the formation of oxygen vacancies through metal doping and creation of nitrogen basic sites through nitrogen doping also contribute to the hydrolysis of organic sulfur. The strategies for anti-oxygen poisoning are discussed in a systematic manner. The structural regulation of catalysts is beneficial for the desorption and diffusion of hydrogen sulfide (H₂S), thereby effectively inhibiting its oxidation. Nitrogen doping and the addition of electronic promoters such as transition metals can protect active sites and decrease the number of active oxygen species. These methods have been proven to enhance the anti-poisoning performance of catalysts. Additionally, this article summarizes how different atmospheres affect the activity of hydrolysis catalysts. The objective of this review is to pave the way for the development of efficient, stable and widely used catalysts for organic sulfur hydrolysis.