Desulfur catalyst

Abstract

A desulfurizing catalyst for removing sulfide, thiooxide and thioether from natural gas or fume contains ZnO, NiO, CaAlO3, TiO2, CoO, MoO and A2O3.

Description

technical field [0001] The invention relates to a solid desulfurization catalyst for removing toxic and harmful substances such as sulfide, sulfur oxide and sulfide in natural gas and flue gas under certain temperature and pressure conditions. Specifically, the invention relates to a Zinc-containing solid desulfurization catalyst. Background technique [0002] SO contained in flue gas released by burning fossil fuels (coal, oil, natural gas, etc.) in energy, chemical, metallurgy, electronics and other industries 2 Cause serious pollution to the atmosphere, my country has become the world's largest SO 2 As the country with the largest emission and the third largest acid rain area, environmental issues have become a key issue for the development of my country's national economy. Industrial practices in recent years have shown that flue gas purification technology is the key to controlling SO 2 An effective way to discharge, desulfurization catalyst is ...

AI Technical Summary

Problems solved by technology

Industrial practices in recent years have shown that flue gas purification technology is the key to controlling SO 2 An effective way to discharge, desulfurization catalyst is an important part of flue gas purification technology, it can be divided into solid and liquid desulfurization catalysts, among them, zinc oxide solid desulfurization catalyst is most widely used in fine desulfurization of various petrochemical raw materials and industrial gases Widely, zinc oxide desulfurizers mainly include high-temperature and low-temperature types. The former is used at a temperature of 350-400°C, and the latter is used at a temperature of 180-250°C. Since both types of desulfurizers need to be used at a certain temperature, it is necessary to There is a heat source and consumes a certain amount of energy. Generally, it cannot be used at room temperature, so the scope of application of this catalyst is narrow;

[0003] Many years ago, the Soviet Union used zinc ore as a desulfurization catalyst, but the desulfurization effect was not good, and the negative resistance caused to the system increased; some manufacturers in China have used zinc oxides, salts, etc. as desulfurization catalysts together with other chemical substances. Such as a kind of "iron-manganese-zinc gaseous hydrocarbon desulfurizer" disclosed by the Chinese Patent Office in 85103555, its desulfurization effect is not very satisfactory. It requires that the sulfur content in the raw gas must be lower than 0.5ppm. When the sulfur content in the natural gas reaches the milligram level per cubic meter, catalyst poisoning will occur; b. The regeneration gas used for the regeneration of the desulfurization catalyst is H 2 and C 0 and other expensive gases, the regeneration cost is very expensive; c. Although the desulfurization catalyst can be regenerated, it needs to be regenerated at 350°C for 10-12 hours, and its activity has declined