Solid adsorbent for removing H2S, CO2, and organic sulfur from mixed gas

Abstract

The invention belongs to the technical fields of gas purification and environment protection, and specifically relates to a solid adsorbent for removing H2S, CO2, CS2, COS, organic sulfur (mercaptan, etc.), and the like from mixed gas. The solid adsorbent is composed of a porous solid carrier and a loaded object. The porous solid carrier comprises active carbon, molecular sieve, silica gel, alumina, hydrotalcite, derivatives of hydrotalcite, and metal organic framework compounds (MOFs). The loaded object is composed of a main agent and an auxiliary agent. The loaded object accounts for 10 to 75 wt% of the weight of the porous solid carrier. The main agent accounts for 30 to 80% of the weight of the loaded object. The provided solid adsorbent is used to remove sulfur and carbon, can be used in reactors such as fixed bed reactor, moving bed reactor, and the like, can be used at a low temperature, and has the characteristics of adjustable selectivity, quick adsorption speed, large adsorption capacity, high removing rate of COS, CS2, and organic sulfur (mercaptan, etc.), and low energy consumption of regeneration.

Description

technical field [0001] The invention belongs to the technical field of gas purification and environmental protection, and specifically relates to a method for removing H from gas mixtures. 2 S, CO 2 and CS 2 , COS, mercaptan and other organic sulfur solid adsorbents. Background technique [0002] There are many occasions in industry that need to remove H from the gas mixture 2 S, CO 2 , COS, CS 2 One or more of acidic impurities such as mercaptans, such as natural gas, refinery catalytic dry gas, coking dry gas, coal bed methane, biogas, landfill gas, and gasification of coal, naphtha, heavy oil, biomass, etc. Synthetic gas produced, etc. for H 2 S, CO 2 There are a variety of mature process methods for the separation of carbon dioxide, such as chemical absorption, physical absorption, adsorption and so on. Chemical absorption methods often use monoethanolamine (MEA), diethanolamine (DEA), N-methyldiethanolamine (MDEA), diglycolamine (DGA), 2-amino-2-methyl-1-propan...

AI Technical Summary

Problems solved by technology

As far as the current industrial application is concerned, porous media can remove various components by physical adsorption at room temperature, but as the adsorption temperature increases, the adsorption capacity decreases, and at the same time, the adsorption capacity and selectivity of the adsorbent decrease at lower temperatures. not high enough

Moreover, most of the current adsorbents have a single function and are not suitable for treating 2 S, CO 2 , COS, CS 2 Mixed gas with several acidic impurities in mercaptan