Method for preparing absorbing agent for medium-temperature gas desulfurization

A kind of adsorbent and gas technology, applied in the direction of chemical instruments and methods, selection of absorbent solid gas purification, other chemical processes, etc., to achieve the effect of simple preparation process and operation

Active Publication Date: 2012-11-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the traditional impregnation method cannot ensure that the active components are evenly distributed in the pores of porous materials to the greatest extent, and provide a k

Method used

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  • Method for preparing absorbing agent for medium-temperature gas desulfurization

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] Will be commercially available γ-Al 2 O 3 Dry it at 200℃ for 2~4h, cool it in a desiccator after cooling, and prepare γ-Al 2 O 3 Carrier.

[0024] Γ-Al with a particle size of 2~3mm 2 O 3 The carrier 50g is placed in a beaker and mixed with 40.00ml of a pre-configured 0.79mol / L ferric nitrate (theoretical value of the mass percentage of iron oxide in the adsorbent is 5.0%). First, it is immersed in an equal volume for 4 hours at room temperature and -0.06MPa vacuum conditions, and then at room temperature and normal pressure, with an ultrasonic wave with a power of 150W, immersed in an equal volume for 4 hours.

[0025] After drying at 70°C and -0.10MPa vacuum conditions for 11h, put it in a muffle furnace, keep it at 700°C for 2h, and cool to room temperature naturally to prepare adsorbent I for desulfurization.

[0026] The desulfurization performance of the adsorbent was evaluated at 500°C, the breakthrough time was 4.8h, and the sulfur capacity was 2.9g / 1...

Example Embodiment

[0027] Example 2

[0028] Γ-Al with a particle size of 2-3mm 2 O 3 The carrier 50g is placed in a beaker and mixed with 40.00ml of a pre-configured 1.57mol / L ferric nitrate (theoretical value of the mass percentage of iron oxide in the adsorbent is 10.0%) solution. First, it is immersed in an equal volume at room temperature and -0.09MPa vacuum for 7 hours, and then at room temperature and normal pressure, with an ultrasonic wave with a power of 350W, immersed in an equal volume for 1 hour.

[0029] After drying for 14 hours at 60°C and -0.09MPa vacuum conditions, put it in a muffle furnace, keep it at 600°C for 2.5 hours, and cool to room temperature naturally to prepare adsorbent II for desulfurization.

[0030] The desulfurization performance of the adsorbent was evaluated at 450, 500 and 550℃, and the breakthrough time was 10.3, 11.8 and 11.2h, and the sulfur capacity was 5.1, 6.9 and 6.2g / 100g adsorbent.

Example Embodiment

[0031] Example 3

[0032] Γ-Al with a particle size of 2-3mm 2 O 3 The carrier 50g is placed in a beaker and mixed with 40.00ml of a pre-configured 2.35mol / L ferric nitrate (theoretical value of the mass percentage of iron oxide in the adsorbent is 15.0%). Firstly, it is immersed in an equal volume for 6 hours at room temperature and -0.07MPa vacuum conditions, and then at room temperature and normal pressure, with an ultrasonic wave with a power of 250W, immersed in an equal volume for 2 hours.

[0033] After drying for 12 hours at 50°C and -0.09MPa vacuum conditions, it was placed in a muffle furnace, kept at 600°C for 2 hours, and naturally cooled to room temperature to prepare adsorbent III for desulfurization.

[0034] The desulfurization performance of the adsorbent was evaluated at 500°C. The breakthrough time was 13.9h, and the sulfur capacity was 8.7g / 100g adsorbent.

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Abstract

The invention discloses a method for preparing an absorbing agent for medium-temperature gas desulfurization. The method comprises that an isometrical ferric nitrate solution is soaked in a Gamma-Al203 carrier isometrically, vacuum impregnation and ultrasonic wave impregnation are performed simultaneously, and the absorbing agent for medium-temperature gas desulfurization with an active componentof ferric oxide is obtained after vacuum drying and high-temperature roasting. During the preparation process of the absorbing agent for medium-temperature gas desulfurization, by the aid of ultrasonic and vacuum synergy effects, the specific surface area of the carrier is improved, the active component is loaded on the carrier uniformly simultaneously, a hole structure of the carrier is improved, component load and drying are completed under ultrasonic and vacuum action, the active component of the prepared absorbing agent is distributed uniformly on the surface of the carrier, the utilization rate of the active component is high, the breakthrough sulfur capacity is large, and the breakthrough time is long.

Description

technical field [0001] The invention belongs to the technical field of coal gas desulfurization and purification, and relates to a preparation method of a coal gas desulfurization adsorbent, in particular to a preparation method of a medium-temperature coal gas desulfurization adsorbent. Background technique [0002] my country's coal reserves are relatively abundant. In the foreseeable future, coal will still be the main energy resource for the sustainable development of my country's economy. Coal-based polygeneration technology with coal gasification as the source and integrated coal gasification cycle power generation technology are currently recognized as two high-efficiency coal conversion methods, which are of great significance to my country's energy security and environmental protection. New coal conversion technology, in addition to pursuing high efficiency of coal utilization, pays more attention to the issue of pollutant emissions caused by coal utilization. [0...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/30C10K1/32
Inventor 常丽萍卢晓芳鲍卫仁王美君廖俊杰肖雨马清亮
Owner TAIYUAN UNIV OF TECH
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