A photothermochemical cycle decomposition of co 2 Titanium-cobalt catalyst and preparation method thereof

A cobalt catalyst, photothermochemical technology, applied in the field of catalysis, can solve the problems to be improved, and achieve the effect of excellent light response, good dispersion and high activity

Active Publication Date: 2021-12-10
ZHEJIANG ZHENENG BEILUN POWER GENERATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the activity, stability, and spectral response range of composite metal oxide catalysts need to be improved. In recent years, research on composite metal oxide catalysts has also carried out a lot of research on the above problems, aiming to develop a combination of activity, stability and economy. catalyst

Method used

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  • A photothermochemical cycle decomposition of co <sub>2</sub> Titanium-cobalt catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] According to the general formula Co of titanium cobalt catalyst x Ti 1-x o 2-x , set x=0.15, the simplified chemical formula is Co 0.15 Ti 0.85 o 1.85 .

[0032] According to the general formula Co x Ti 1-x o 2-x , where x=0.15, weigh CoSO according to the molar ratio 4 ·7H 2 O and TiOSO 4 , and then according to the molar ratio TiOSO 4 :C 6 h 8 o 7 ·H 2 O is 1:3 and weighs citric acid C 6 h 8 o 7 ·H 2 O, add deionized water to 80 ℃ water bath and heat until completely dissolved, TiOSO in the solution 4 The molar concentration is 0.5mol / L.

[0033] Add 5 mol / L NaOH solution dropwise to adjust the pH to 9, and continue to stir for 30 minutes to obtain a gel-like mixture; transfer it to a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, and heat it at a heating rate of 2°C / min to 160°C and keep warm for 24h; centrifuge the resulting mixture at 5000r / min for 10min, remove the insoluble matter in the lower layer, and wash with abs...

example 2

[0035] According to the general formula Co of titanium cobalt catalyst x Ti 1-x o 2-x , set x=0.01, the simplified chemical formula is Co 0.01 Ti 0.99 o 1.99 .

[0036] According to the general formula Co x Ti 1-x o 2-x , where x=0.01, weigh CoSO according to the molar ratio 4 ·7H 2 O and TiOSO 4 , and then according to the molar ratio TiOSO 4 :C 6 h 8 o 7 ·H 2 O is 1:3 and weighs citric acid C 6 h8 o 7 ·H 2 O. Add the three substances into deionized water, heat in a water bath at 80°C until completely dissolved, and TiOSO in the solution 4 The molar concentration is 0.3mol / L.

[0037] Add 7mol / L NaOH solution dropwise to adjust the pH to 9.5, and continue to stir for 30 minutes to obtain a gel-like mixture; transfer it to a polytetrafluoroethylene-lined stainless steel hydrothermal kettle, and heat it at a heating rate of 2.5°C / min to 160°C and keep warm for 24h; centrifuge the resulting mixture at 5000r / min for 10min, remove the insoluble matter in the l...

example 3

[0039] According to the general formula Co of titanium cobalt catalyst x Ti 1-x o 2-x , set x=0.3, the simplified chemical formula is Co 0.3 Ti 0.7 o 1.7 .

[0040] According to the general formula Co x Ti 1-x o 2-x , where x=0.3, weigh CoSO according to the molar ratio 4 ·7H 2 O and TiOSO 4 , and then according to the molar ratio TiOSO 4 :C 6 h 8 o 7 ·H 2 O is 1:3 and weighs citric acid C 6 h 8 o 7 ·H 2 O, add deionized water to 80 ℃ water bath and heat until completely dissolved, TiOSO in the solution 4 The molar concentration is 0.2mol / L.

[0041] Add 10 mol / L NaOH solution dropwise to adjust the pH to 10, and continue stirring for 30 min to obtain a gel-like mixture; transfer it to a polytetrafluoroethylene-lined stainless steel hydrothermal kettle, and heat it at a heating rate of 3 °C / min to 160°C and keep warm for 24h; centrifuge the resulting mixture at 5000r / min for 10min, remove the insoluble matter in the lower layer, and wash with absolute etha...

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Abstract

The invention relates to the technical field of catalysis and aims to provide a method for decomposing CO in a photothermochemical cycle. 2 Titanium cobalt catalyst and preparation method thereof. The active component of the catalyst is composed of cobalt oxide and titanium oxide, and its general formula is Co x Ti 1‑x o 2‑x , 0<x≤0.3. The catalyst of the invention has good photoresponse ability, redox property and photohydrophilicity, good anti-sintering ability and high activity. The active component has wide sources, low price, non-toxicity, and has the characteristics of excellent photoresponse. Good dispersion, small particle size, good stability. The present invention uses aqueous solution system, has reduced the use of organic solvent, uses TiOSO 4 As a titanium source, relative to TiCl 4 The hydrolysis is weaker, making the preparation process more controllable.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a method for photothermochemical cycle decomposition of CO 2 Titanium-cobalt composite oxide catalyst and preparation method thereof. Background technique [0002] At present, the world is experiencing a critical stage of increasing shortage of energy and resources and serious environmental pollution. The consumption of primary non-renewable energy such as coal, oil, and natural gas has increased sharply with the development of human economy and society. Therefore, seeking clean and renewable energy to replace the existing primary energy is the only way to alleviate the current energy dilemma. CO 2 As the most simple and easy-to-obtain carbon source on earth, combining it with renewable energy systems and using appropriate methods to convert it into CO can not only alleviate the climate effect caused by coal burning, but also provide a feasible idea for clean energy utilizati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75C01B32/40
CPCC01B32/40B01J23/002B01J23/75B01J35/004
Inventor 方志星张彦威俞建楠王智化吕安斌周俊虎陈章伟倪明江胡劲逸岑可法
Owner ZHEJIANG ZHENENG BEILUN POWER GENERATION
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