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Zinc oxide medium and high temperature coal gas fine desulfurizer and preparation method

A desulfurizer, medium and high temperature technology, which is used in combustible gas purification, combustible gas purification/transformation, petroleum industry, etc. Simple preparation process

Inactive Publication Date: 2012-12-19
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the zinc oxide medium-high temperature gas fine desulfurizer and its preparation method is to solve the main problems in the current medium-high temperature gas desulfurization technology, such as poor cycle thermal stability of the desulfurizer, low desulfurization precision, etc., to provide a method with simple steps and good thermal stability. Zinc oxide medium-high temperature gas fine desulfurizer with high desulfurization precision and preparation method thereof

Method used

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  • Zinc oxide medium and high temperature coal gas fine desulfurizer and preparation method
  • Zinc oxide medium and high temperature coal gas fine desulfurizer and preparation method
  • Zinc oxide medium and high temperature coal gas fine desulfurizer and preparation method

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Effect test

Embodiment approach 1

[0019] Embodiment 1: Sieve the semi-coke to obtain 4-8 mesh particles, mix it with a zinc nitrate solution with a mass concentration of 20% at a volume ratio of 0.7:1, put it in an autoclave, and pressurize and impregnate it at 28 atm for 5 hours , and then naturally cooled to room temperature, the sample was taken out, filtered, and dried at 50°C for 5 hours, and then at 100°C for 5 hours, and then dried in N 2 Calcined under purging for 5 hours, and naturally cooled to room temperature to obtain desulfurizer I. The vulcanization experiment was carried out at a temperature of 500°C, and the reaction gas composition (volume ratio) was CO (33%), H 2 (39%), H 2 O (5%), H 2 S (300ppm), N 2 As a balance gas, the air speed is 2000h -1 . h 2 When the S outlet concentration is greater than 1ppm, the sulfur capacity of the desulfurizer is 4.46gS / 100g desulfurizer, and the breakthrough time is 23h. Using the desulfurizing agent preparation method published by patent CN 100443161...

Embodiment approach 2

[0022] Embodiment 2: Sieve the semi-coke to obtain 4-8 mesh particles, mix it with a zinc nitrate solution with a mass concentration of 20% at a ratio of 0.7:1, put it in an autoclave, and pressurize it at 28 atm for 7 hours Naturally cool to room temperature, take out the sample, filter, and dry at 70°C for 5 hours, then at 120°C for 5 hours, and then in N 2 Calcined under purging for 5 hours, and naturally cooled to room temperature to obtain desulfurizer II. The vulcanization experiment was carried out at 500°C, and the reaction gas composition (volume ratio) was CO (33%), H 2 (39%), H 2 O (5%), H 2 S (1000ppm), N 2 As a balance gas, the air speed is 2000h -1 . h 2 When the S outlet concentration is greater than 1ppm, the sulfur capacity and breakthrough time are 4.55gS / 100g desulfurizer and 7.5h, respectively.

Embodiment approach 3

[0023] Embodiment 3: Sieve the semi-coke to obtain 4-8 mesh particles, mix it with a zinc nitrate solution with a mass concentration of 20% at a ratio of 0.7:1, put it in an autoclave, and pressurize it at 20 atm for 5 hours. Naturally cool to room temperature, take out the sample, filter, and dry at 50°C for 5 hours, then at 100°C for 5 hours, and then in N 2 Calcined under purging for 6 hours, and naturally cooled to room temperature to obtain desulfurizer III. The vulcanization experiment was carried out at 500°C, and the reaction gas composition (volume ratio) was CO (33%), H 2 (39%), H 2 O (5%), H 2 S (1000ppm), N 2 As a balance gas, the air speed is 2000h -1 . h 2 The sulfur capacity and breakthrough time when the S outlet concentration is greater than 1ppm are 6.57gS / 100g desulfurizer and 16h, respectively.

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Abstract

The invention relates to a zinc oxide medium and high temperature coal gas fine desulfurizer and a preparation method, belonging to the technical field of the preparation and the application of desulfurizers, in particular to the preparation and the application of zinc oxide medium and high temperature coal gas fine desulfurizers. The zinc oxide medium and high temperature coal gas fine desulfurizer is characterized by having wide sources and high price and can finely remove sulfureted hydrogen at medium and high temperature (300-550 DEG C) in the strongly reducing atmosphere. The active ingredients of the desulfurizer are uniformly distributed on a carrier surface and have the particle diameter of 10-400 nm. In the preparation method, the two steps of semicoke carrier modification and the active ingredient dipping are combined into one step, the two functions for improving the carrier hole structure and loading the components can be synchronously finished in an autoclave. The semicoke has wide sources, high price and simple preparation technique; the prepared desulfurizer can finely remove sulfureted hydrogen at medium and high temperature in the strongly reducing atmosphere, hasbetter thermal stability, and can be widely used in the field of desulfurizing and purifying the reducing chemical virgin gas which is prepared by using coal as materials.

Description

technical field [0001] The zinc oxide mid-temperature gas fine desulfurizer and preparation method of the present invention belong to the technical field of preparation and application of desulfurizers, and particularly relate to the preparation and application of zinc oxide mid-high temperature gas fine desulfurizers. The technical scheme of the present invention can be applied to integral gas Chemicalized combined cycle power generation technology, medium and high temperature gas purification in polygeneration systems, and preparation of desulfurization and purification agents for reducing chemical raw material gases prepared from coal. Background technique [0002] The clean conversion of coal is an important energy utilization technology that meets the goal of sustainable development of mankind. In the coal gasification process, if the sulfur in the coal gas can be removed to a lower level under medium and high temperature conditions, the clean conversion efficiency of c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10K1/20
Inventor 郑仙荣常丽萍王建成鲍卫仁谢克昌靳庆麦
Owner TAIYUAN UNIV OF TECH
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