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Copper-cerium double-metal modified 4A molecular sieve desulfurization adsorbent as well as preparation method and application thereof

A molecular sieve, bimetallic technology, applied in chemical instruments and methods, refined hydrocarbon oil, other chemical processes, etc., can solve the problems of harsh reaction conditions, inability to efficiently remove thiophene, etc., to solve the steric hindrance effect and excellent adsorption. Effect of desulfurization performance

Active Publication Date: 2021-06-11
内蒙古包钢和发稀土有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Aiming at this serious problem, the traditional hydrodesulfurization method is still the most used in the industry at present, but it has harsh reaction conditions and cannot efficiently remove thiophene and benzene Therefore, the adsorption desulfurization method with mild reaction conditions and more efficient reaction has attracted much attention.

Method used

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  • Copper-cerium double-metal modified 4A molecular sieve desulfurization adsorbent as well as preparation method and application thereof
  • Copper-cerium double-metal modified 4A molecular sieve desulfurization adsorbent as well as preparation method and application thereof
  • Copper-cerium double-metal modified 4A molecular sieve desulfurization adsorbent as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0034] The 4A molecular sieve was synthesized from kaolin as a carrier, and the copper precursor solution and the cerium precursor solution were used to modify the 4A molecular sieve twice, and the active components copper and cerium were successfully loaded on the molecular sieve to realize the deep adsorption desulfurization of DBT.

[0035] Preparation of copper-cerium bimetallic modified 4A molecular sieve adsorbent: Weigh 5g of 4A molecular sieve, place it in 50ml of 0.5M cuproammonia solution, perform ion exchange at 50°C for 12 hours under reflux conditions, collect samples by centrifugation after the exchange, and place in Drying at 100°C for 12 hours, followed by calcination at 550°C, the calcination process is: heating up to 550°C at 5°C / min, holding for 4 hours and then cooling in the furnace, the monometallic copper modified adsorbent can be prepared, denoted as CuA. Preparation of bimetallic modified 4A molecular sieve adsorbent: Weigh 2g of CuA molecular sieve, pl...

Embodiment 2

[0038] The 4A molecular sieve was synthesized from kaolin as a carrier, and the copper precursor solution and the cerium precursor solution were used to modify the 4A molecular sieve twice, and the adsorbent was used for the adsorption of DBT.

[0039] Copper modification process is identical with embodiment 1, just this moment copper source changes copper nitrate into;

[0040] The experimental process of DBT adsorption desulfurization is the same as that in Example 1.

Embodiment 3

[0042] The 4A molecular sieve was synthesized from kaolin as a carrier, and the copper precursor solution and the cerium precursor solution were used to modify the 4A molecular sieve twice, and the adsorbent was used for the adsorption of DBT.

[0043] The copper modification process is the same as in Example 1, except that the cuproammonia solution concentration is changed to 0.3M at this time;

[0044] The experimental process of DBT adsorption desulfurization is the same as that in Example 1.

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Abstract

The invention relates to a copper-cerium double-metal modified 4A molecular sieve desulfurization adsorbent as well as a preparation method and application thereof. The adsorbent takes copper and cerium as active components and takes a 4A molecular sieve synthesized by kaolin as a carrier material. The method comprises the following steps: (1) preparing a copper source solution, carrying out copper impregnation modification on a 4A molecular sieve through a water bath, and calcining after centrifugal drying to obtain a copper modified molecular sieve; and (2) preparing a cerium source solution, performing cerium impregnation modification on the copper modified molecular sieve through a water bath, and calcining after centrifugal drying to obtain the copper-cerium double-metal modified 4A molecular sieve desulfurization adsorbent. The adsorbent is applied to the field of fuel oil deep desulfurization. Compared with the prior art, thedsorbent provided by the invention has the advantages of capability of realizing excellent desulfurization performance under normal temperature and normal pressure conditions, small influence on components in the fuel, high octane number, low investment, low operation cost, low energy consumption, high desulfurization rate and the like.

Description

technical field [0001] The invention relates to the field of deep adsorption desulfurization of fuel oil, in particular to a copper-cerium bimetallic modified 4A molecular sieve desulfurization adsorbent and a preparation method and application thereof. Background technique [0002] Environmental issues have become the focus of the world, and it is imperative to protect the environment. Among them, serious acid rain and smog problems have become the top priority of governance because they are closely related to human living conditions, and the culprit of these problems is mainly sulfur oxides (SO x ). [0003] In response to this serious problem, the traditional hydrodesulfurization method is still the most used in the industry at present, but it has the problem of harsh reaction conditions and the inability to efficiently remove thiophene, benzothiophene and dibenzothiophene sulfur-containing compounds such as thiophene , so the adsorption desulfurization method with mild...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/32C10G25/00
CPCB01J20/0237B01J20/0207B01J20/186B01J20/3204B01J20/3234C10G25/003C10G2300/202
Inventor 郭益平黄成周建国赵智承赵宇驰
Owner 内蒙古包钢和发稀土有限公司
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