A kind of arsenic removal agent and its preparation method and application

A technology for removing arsenic and coal-to-synthesis gas, applied in the field of coal chemical industry, can solve problems such as Fischer-Tropsch synthesis, and achieve the effects of reducing other side reactions, high arsenic content, and simple production process

Active Publication Date: 2018-07-20
FUZHOU UNIV ASSET MANAGEMENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, what the present invention aims to solve is that the arsenic removal agent is likely to cause water-gas shift side reactions and other side reactions such as methanation and Fischer-Tropsch synthesis in the coal-to-synthesis gas during the arsenic removal process, thereby providing an arsenic removal process Arsenic removal agent with low water-gas shift side reaction, large adsorption capacity, good arsenic removal precision, high arsenic removal rate, and high performance stability and preparation method thereof

Method used

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  • A kind of arsenic removal agent and its preparation method and application
  • A kind of arsenic removal agent and its preparation method and application
  • A kind of arsenic removal agent and its preparation method and application

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Embodiment 1

[0035] This embodiment provides an arsenic-removing agent and a preparation method thereof. The arsenic removal agent consists of a carrier and an active component loaded on the carrier; the carrier has a specific surface area of ​​173.2m 2 / g, magnesium aluminum spinel with a crystallinity of 88%, the active component is NiMn 2 o 4 For spinel, the mass ratio of the active component to the carrier is 12:100.

[0036] The preparation method of the arsenic removal agent described in this embodiment comprises the following steps:

[0037] S1, magnesium source-light MgO, aluminum source-Al 2 o 3 ·3H 2 O is kneaded with acidic aqueous solution, and the molar ratio of aluminum source and magnesium source is MgO / Al 2 o 3 The calculation is 1:2, the acidic aqueous solution is nitric acid aqueous solution, the concentration is 2mol / L;

[0038] S2. Adding inorganic additives to the kneaded mixture, ensuring that the mass ratio of the kneaded mixture and the inorganic additives is ...

Embodiment 2

[0043] This embodiment provides an arsenic-removing agent and a preparation method thereof. The arsenic removal agent consists of a carrier and an active component loaded on the carrier; the carrier has a specific surface area of ​​158.9m 2 / g, magnesia-alumina spinel with crystallinity of 86%, the active component is NiMn 2 o 4 For spinel, the mass ratio of the active component to the carrier is 12:100.

[0044] The preparation method of the arsenic removal agent described in this embodiment comprises the following steps:

[0045] S1. Knead magnesium source-light basic magnesium carbonate, aluminum source-pseudoboehmite and acidic aqueous solution, and the molar ratio of aluminum source and magnesium source is MgO / Al 2 o 3 Calculated as 0.8:2, the acidic aqueous solution is nitric acid aqueous solution, the concentration is 2mol / L;

[0046] S2. Add inorganic additives to the kneaded mixture, ensure that the mass ratio of the kneaded mixture and the inorganic additives is...

Embodiment 3

[0051] This embodiment provides an arsenic-removing agent and a preparation method thereof. The arsenic removal agent consists of a carrier and an active component loaded on the carrier; the carrier has a specific surface area of ​​171.1m 2 / g, magnesia-aluminum spinel with a crystallinity of 90%, the active component is NiMn 2 o 4 For spinel, the mass ratio of the active component to the carrier is 12:100.

[0052] The preparation method of the arsenic removal agent described in this embodiment comprises the following steps:

[0053] S1, magnesium source-light MgO, aluminum source-Al 2 o 3 ·H 2 O is kneaded with acidic aqueous solution, and the molar ratio of aluminum source and magnesium source is MgO / Al 2 o 3 Calculated as 1.2:1.5, the acidic aqueous solution is nitric acid aqueous solution, the concentration is 2mol / L;

[0054] S2. Adding inorganic additives to the kneaded mixture, ensuring that the mass ratio of the kneaded mixture and the inorganic additives is 1...

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Abstract

The invention discloses an arsenic removal agent as well as a preparation method and application thereof. The arsenic removal agent includes a carrier and an active component loaded on the carrier; the carrier is magnesium aluminum spinel; and the active component includes NiMn2O4 spinel. The preparation method of the arsenic removal agent comprises the following steps: immersing the aqueous solution of the nickel precursor and the manganese precursor and the magnesium aluminum spinel in equal volumes and standing for 4 to 8 hours to obtain a sample; drying at ~140°C for 4-8 hours; placing the dried sample in an environment of 350°C-550°C for 2-6 hours to prepare the arsenic-removing agent. The arsenic removal agent has good stability and high arsenic capacity, and can perform arsenic removal treatment in coal-to-synthesis gas under the conditions of high pressure, high temperature, high steam-gas ratio and high concentration of CO, and the side reactions of water-gas shift and other side reactions such as The degree of methanation and Fischer-Tropsch synthesis is low.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to an arsenic removal agent and its preparation method and application. Background technique [0002] Coal is an important resource in my country, and coal-to-synthesis gas technology is one of the main ways to utilize coal resources. Under normal circumstances, coal is first gasified by various gasification technologies, such as coal-water slurry pressurized gasification technology, pulverized coal pressurized gasification technology and fixed bed pressurized gasification technology, etc., and then purified and catalyzed by catalysts. After adjusting H / C, coal-to-synthesis gas is obtained. These synthesis gases can be synthesized into various subsequent products such as ammonia, methanol, hydrogen, oil, and ethylene glycol. [0003] The composition of the synthesis gas obtained by the above-mentioned gasification technology is very complex, in addition to having high pressur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/08B01J20/30C10K1/32
CPCB01J20/041B01J20/06B01J20/08C10K1/32
Inventor 江莉龙雷淦昌曹彦宁马永德
Owner FUZHOU UNIV ASSET MANAGEMENT CO LTD
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