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Application of hydrotalcite-like compound derived composite oxide material

A composite oxide and hydrotalcite technology, which is applied in the field of acid gas treatment and resource recovery, can solve the problem of low activity and achieve excellent catalytic activity

Active Publication Date: 2020-08-18
UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, these catalysts are generally not active (the hydrogen yield is 20% at 770°C)

Method used

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  • Application of hydrotalcite-like compound derived composite oxide material
  • Application of hydrotalcite-like compound derived composite oxide material
  • Application of hydrotalcite-like compound derived composite oxide material

Examples

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Embodiment 1

[0036] Mg 3 -Al-LDO, Co 3 -Al-LDO and Ni 3 -Synthesis method of Al-LDO hydrotalcite-derived composite oxide:

[0037] MgNO 3 , CoNO 3 , NiNO 3 , Al 2 (NO 3 ) 3 , NaOH and (NH 4 ) 6 Mo 7 O 24 As a raw material for synthesis. First, 60mmol of MgNO 3 (CoNO 3 , NiNO 3 ), 20mmol of Al 2 (NO 3 ) 3 Dissolve the solution 1 in 200ml of deionized water from which carbon dioxide has been removed with nitrogen in advance, and pour the mixed solution 1 into 800ml of 0.15M NaOH solution in a short time (5s). It was then stirred for 15 minutes under a nitrogen atmosphere. Then suction filter, wash 3 times with deionized water for removing carbon, and dry the filter cake overnight at 80℃ to make M 2 Al-LDH precursor. The precursor is calcined at 550℃ in air for 4h to obtain the hydrotalcite-like composite oxide Mg 3 Al-LDO, Co 3 Al-LDO and Ni 3 Al-LDO.

[0038] Mg 3 AlMo-LDO, Co 3 AlMo-LDO and Ni 3 Synthesis method of AlMo-LDO hydrotalcite-derived composite oxide:

[0039] 3 g of the milled 40-60...

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Abstract

The invention discloses an application of a hydrotalcite-like compound derived composite oxide material. The hydrotalcite-like derivative composite oxide provided by the invention is applied to catalytic decomposition of hydrogen sulfide or hydrogen sulfide in acid gas to prepare hydrogen and elemental sulfur. The method for preparing hydrogen and elemental sulfur by catalytically decomposing hydrogen sulfide comprises the following steps: catalyzing hydrogen sulfide in hydrogen sulfide or acidic gas to carry out decomposition reaction by adopting the hydrotalcite-like derived composite oxide,thereby obtaining hydrogen and elemental sulfur. The hydrotalcite-like derived composite oxide material is stable in structure, and has good thermal stability, sulfur resistance, temperature fluctuation resistance, high-temperature sintering resistance and thermal shock resistance during catalysis; the hydrotalcite-derived composite oxide shows excellent catalytic activity in the catalytic decomposition reaction of acid gas H2S in the chemical industry, and 50% of H2 yield (800 DEG C) can be obtained.

Description

Technical field [0001] The invention relates to the application of a hydrotalcite-like derivative composite oxide material, in particular to the application of the hydrotalcite-like derivative composite oxide material in the catalytic decomposition of hydrogen sulfide to produce hydrogen and elemental sulfur, and belongs to the field of acid gas treatment and resource recovery. Background technique [0002] A large amount of hydrogen sulfide acid gas is produced in the production process of petrochemical industry, coal chemical industry and natural gas chemical industry. Hydrogen sulfide is a highly toxic, foul-smelling colorless gas and a nerve agent. The main organs of its toxic effect are the central nervous system and respiratory system, and it can also cause damage to the heart and other organs; the most sensitive tissues to the toxic effect are the brain and mucous membranes. It is estimated that my country's chemical industry will generate more than 12 million tons of aci...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/52C10L3/10C01B17/04C01B3/04
CPCB01D53/8612C10L3/103C01B17/0495C01B3/04B01D2255/40Y02E60/36
Inventor 张鑫蒋国霞张凤莲
Owner UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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