Zinc oxide based normal-temperature deep desulfurizing agent as well as preparation method and application thereof

Abstract

The invention relates to a zinc oxide based normal-temperature deep desulfurizing agent as well as a preparation method and application thereof. During preparation, a mixed solution of a zinc salt, an aluminum salt and an aid metallic salt is subjected to a one-step coprecipitation reaction to form a compound precipitate; the compound precipitate is subjected to aging, drying and roasting to obtain the zinc oxide based normal-temperature deep compound desulfurizing agent. The prepared zinc oxide based normal-temperature deep desulfurizing agent is used for the normal-temperature deep removal of H2S in various gaseous and liquid materials in the field of petroleum and coal chemical industries; that is, the fixed-bed operation is adopted; in conditions that a reaction temperature is 20 to 60 DEG C and operation pressure is 0.1MPa to 5MPa, the volume space velocity of liquid is controlled to be 1h<-1> to 12h<-1> or a gas-phase space velocity is controlled to be 1,000h<-1> to 30,000h<-1>; the H2s of which the content is 1ppm to 1,000ppm in a to-be-treated material is removed until the content is not more than 0.03ppm. Compared with the prior art, the desulfurizing agent prepared by the preparation method has breakthrough sulfur capacity, which reaches 26.1 percent, at a normal temperature and desulfurization precision which reaches 0.03ppm or below; the preparation method is simple, and can be used for large-scale industrialized production.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical materials, and relates to a zinc oxide-based deep desulfurizer at normal temperature and its preparation method and application, in particular to a method for desulfurizing hydrogen sulfide in various gaseous and liquid materials at normal temperature in the field of petroleum and coal chemical industry. Zinc oxide-based desulfurizer for deep removal and its preparation method and application. Background technique [0002] Hydrogen sulfide (H 2 S) widely exists in petroleum and coal chemical products such as olefins, liquefied petroleum gas, natural gas, and synthetic gas. During the transportation and storage of these chemical raw materials, H 2 S will corrode equipment and pipes. Especially in the process of its subsequent deep processing and utilization, a very small amount of H 2 The presence of S will lead to catalyst poisoning. Therefore, in the industrial production process...

AI Technical Summary

Problems solved by technology

[0009] To sum up, although after years of research, the desulfurization performance of zinc oxide-based desulfurizers has been greatly improved, but the current technology of zinc oxide-based desulfurizers still has the following deficiencies: 1) The sulfur capacity of the desulfurizer needs to be improved. Further improvement, especially the sulfur capacity at room temperature is generally lower than 15%; 2) The desulfurization precision is not enough, it is difficult to remove hydrogen sulfide to below 0.03ppm; 3) The low-temperature activity of the desulfurizer is insufficient, so it is necessary to achieve good desulfurization effect and high sulfur capacity It often needs to be carried out at a higher temperature, which increases energy consumption and operating costs; 4) It is still necessary to find a simpler preparation method for desulfurization agent, improve the utilization rate of active components, and reduce costs