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A preparation method of molecular sieve adsorbent for gas desulfurization

A molecular sieve and adsorbent technology, which is applied in the field of molecular sieve adsorbent preparation, can solve the problems of difficult adsorption, complex types of sulfur-containing substances, and low efficiency, so as to improve adsorption activity, enhance desulfurization adsorption and structural stability, and increase The effect of aperture

Active Publication Date: 2022-05-17
WUHAN KELIN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] What the present invention aims to solve is the technical problem of complex types of sulfur-containing substances in the existing flue gas, difficult adsorption, and low efficiency, and provides a preparation method for a desulfurizer capable of fully adsorbing various forms of sulfur-containing substances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] ZSM-5, Y molecular sieve and SAPO-11 molecular sieve with the silicon-aluminum ratio of group A being 120 are ZSM-5 by mass percentage: Y molecular sieve: SAPO-11 molecular sieve is 70%: 22%: 8% ratio mixing, then Treat in 0.08mol / L hydrochloric acid at 50°C for 1 hour, wash with deionized water until the pH is 7, and dry at 120°C. Finally, equal volumes of Ag, Sm, Ce, and Zn solutions were impregnated, and the loads were 0.05% for Ag, 1% for Sm, 0.5% for Ce, and 1% for Zn, and then dried at 120°C for 3 hours and roasted at 400°C. 4h.

[0037] The 13X molecular sieves of group B were treated with water vapor at 550°C for 4 hours, then treated with water vapor at 550°C, and finally impregnated with an equal volume of Lu solution, dried at 120°C for 3 hours, and calcined at 400°C for 4 hours. The Lu content accounted for 1.5% of group B.

[0038] The medium-volume impregnation of the molecular sieves of the two groups A and B was completed under ultrasonic, the impregnat...

Embodiment 2

[0043]ZSM-5, Y molecular sieve, and SAPO-11 molecular sieve with a silicon-aluminum ratio of group A of 209 are ZSM-5 in mass percentage: Y molecular sieve: SAPO-11 molecular sieve is 60%: 30%: 10% The ratio is mixed, and then Treat in 0.05mol / L hydrochloric acid at 60°C for 1 hour, wash with deionized water until the pH is 7, and dry at 120°C. Finally, equal volumes of Ag, Sm, Ce, and Zn solutions were impregnated, and the loads were 0.1% for Ag, 2% for Sm, 0.3% for Ce, and 3% for Zn, and then dried at 120°C for 3 hours and roasted at 400°C. 4h.

[0044] The 13X molecular sieves of group B were treated with water vapor at 550°C for 4 hours, then treated with water vapor at 550°C, and finally impregnated with an equal volume of Lu solution, dried at 120°C for 3 hours, and calcined at 400°C for 4 hours. The Lu content accounted for 2% of group B.

[0045] The medium-volume impregnation of the molecular sieves of the two groups A and B was completed under ultrasonic, the impreg...

Embodiment 3

[0050] ZSM-5, Y molecular sieve, and SAPO-11 molecular sieve with the silicon-aluminum ratio of group A being 500 are ZSM-5 by mass percentage: Y molecular sieve: SAPO-11 molecular sieve is 80%: 14%: 6% ratio mixing, then Treat in 0.2mol / L hydrochloric acid at 70°C for 1 hour, wash with deionized water until the pH is 7, and dry at 120°C. Finally, equal volumes of Ag, Sm, Ce, and Zn solutions were impregnated, and the loads were 0.06% for Ag, 4% for Sm, 2% for Ce, and 5% for Zn, and then dried at 120°C for 3 hours and roasted at 400°C. 4h.

[0051] The 13X molecular sieves of group B were treated with water vapor at 550°C for 4 hours, then treated with water vapor at 550°C, and finally impregnated with an equal volume of Lu solution, dried at 120°C for 3 hours, and calcined at 400°C for 4 hours. The Lu content accounted for 2.5% of group B.

[0052] The medium-volume impregnation of the molecular sieves of the two groups A and B was completed under ultrasonic, the impregnatin...

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Abstract

The invention discloses a method for preparing a molecular sieve adsorbent used for gas desulfurization. Several molecular sieves such as ZSM‑5 and SAPO‑11 are pretreated to a certain extent according to their different characteristics, and then combined with a pore-enlarging agent and a binder Mix evenly, then extrude into strips, dry and roast to obtain the finished desulfurization adsorbent. The desulfurization adsorbent has the characteristics of high sulfur capacity and good stability, and is applicable to various types of gas desulfurization.

Description

technical field [0001] The invention belongs to the technical field of adsorption desulfurization, and in particular relates to a preparation method of a molecular sieve adsorbent for gas desulfurization, which is especially suitable for desulfurization in various flue gases. Background technique [0002] For a long time, coal and other fossil fuels have occupied a very important position in my country's energy structure. Therefore, various stoves, boilers, kilns, cracking furnaces, and chemical equipment that produce waste gas may produce a large amount of sulfur-containing flue gas. Furthermore, acid deposition causes environmental pollution. With the enhancement of people's awareness of environmental protection, people urgently need to purify these harmful sulfur-containing flue gases. [0003] At present, the flue gas desulfurization technology can be divided into wet method, dry method and semi-dry method according to the form of by-products. Wet flue gas desulfurizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/30B01D53/02
CPCB01J20/186B01D53/02B01D2257/302B01D2258/0283
Inventor 张先茂陈凯周正王泽王瑜彭渺金建涛王天元郑敏
Owner WUHAN KELIN FINE CHEM
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