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Method for increasing value of carbon dioxide photocatalytic reduction process

A photocatalysis and catalyst technology, applied in the field of solar energy utilization, can solve the problems of low industrial value and low efficiency, and achieve the effect of improving the conversion rate of CO2

Pending Publication Date: 2022-03-15
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, so far, the photocatalytic reduction of CO 2 The efficiency of the process is still very low, and mainly products such as methane of low industrial value are obtained

Method used

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  • Method for increasing value of carbon dioxide photocatalytic reduction process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of Example 1 Supported Copper Cluster Catalyst

[0030] (1) Preparation of TiO 2 Nanotube array, comprising the steps of:

[0031] Electrolyte preparation: 0.3g NH 4 F, 2ml H 2 O was dissolved in 100ml ethylene glycol and poured into a 200ml plastic beaker with a stirrer to form an electrolyte.

[0032] Electrode preparation: The metal titanium sheet was trimmed to form a disc with a diameter of 2 cm, and the surface of the titanium sheet was polished with 7000-grit sandpaper to remove the surface oxidized part. Ultrasonic clean the polished titanium sheet in 10ml of absolute ethanol for 15 minutes, continue to ultrasonically clean it in acetone for 15 minutes, after the ultrasonic wave is completed, wash it with deionized water for 3 to 5 times, and put it in ethanol for later use to avoid oxidation.

[0033] Prepare the polishing solution: the composition of the polishing solution is: 10ml H 2 O, 5ml HNO 3 , 3ml H 2 o 2 , 1ml 18% (NH 2 ) 2 CO solut...

Embodiment 2

[0041] Embodiment 2 Non-concentrating operation

[0042] The concentrating mirror on the concentrating reaction system was removed, and the performance of the copper cluster catalyst loaded under non-concentrating conditions was measured for comparison. Clean the photocatalytic reactor and dry it in an oven; insert a thermocouple into the reactor to monitor the temperature change; secondly, place the prepared supported copper cluster catalyst with a loading capacity of 10% on the catalyst tray Add 2 mL of deionized water, seal the reactor well, and use a vacuum pump to pump out the air in the reactor, and then pass in nitrogen (99%) to purge and remove impurity gases. 2 The gas is filled into the reactor (filling volume: 0.1MP), and finally the reactor is placed on the light concentration reaction system, and the switch is turned on. The solar biaxial tracking system adjusts and irradiates the sunlight on the light incident window of the reactor, and starts reaction. Samples...

Embodiment 3

[0043] The chemical chain reaction under the concentrating condition of embodiment 3 (using a kind of classic catalyst P25 as contrast)

[0044] The chemical chain reaction is realized under light-gathering conditions, first by conventional CO 2 Preparation of methane and CO by photocatalytic reduction process 2 mixed composition. That is to say, the photocatalytic reactor is cleaned and dried in an oven; a thermocouple is inserted into the reactor to monitor the temperature change; secondly, P25 (standard TiO produced by Degussa, Germany) 2 Catalyst) photocatalyst placed on the catalyst tray, add 2mL deionized water, and then CO 2 The gas is filled into the reactor (filling amount: 0.1MP), and finally the reactor is placed on the light concentrating reaction system, and the sunlight is gathered by the light concentrating system (the concentration ratio is 200, and the temperature reaches 300°C) and irradiated on the On the light incident window of the reactor, the reaction...

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Abstract

The invention discloses a method for increasing the value of a carbon dioxide photocatalytic reduction process, and particularly relates to a method for increasing a CO2 photocatalytic reduction C2 < + > product, which is realized through a chemical chain reaction and comprises the following steps of: firstly, performing photocatalytic reduction on part of carbon dioxide into methane under a proper condition; methane and residual carbon dioxide are subjected to a coupling reaction under proper conditions; according to the method, the CO2 reduction product methane is consumed, the C2 + product with the higher additional value is generated, the CO2 conversion rate is increased, and the industrial value of artificial photosynthesis is increased due to the fact that the selectivity of the C2 + product is improved.

Description

technical field [0001] The invention belongs to the field of solar energy utilization, and relates to a method for increasing the value of the photocatalytic reduction process of carbon dioxide, in particular to a method for increasing CO 2 photocatalytic reduction of C 2 +products (products containing more than two carbons). Background technique [0002] The massive consumption of fossil energy has brought serious energy crisis and environmental problems to human society. CO emissions from fossil fuel combustion 2 It is one of the main causes of the greenhouse effect. current atmospheric CO 2 Concentrations have increased by 39% since the beginning of the Industrial Revolution and global temperatures have risen by 0.8°C. In order to solve the problem of global climate change, compared with the pre-industrial revolution, the global temperature change must be kept within 2°C; compared with 2010, the CO in the atmosphere 2 Concentrations should be reduced by 41-72% by 20...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/62B01D53/00C07C1/02C07C9/04C07C2/76C07C11/04
CPCB01D53/86B01D53/62B01D53/007C07C1/02C07C2/76B01D2259/802B01D2257/504B01D2255/20761B01D2255/20707C07C9/04C07C11/04Y02P20/50Y02P20/52
Inventor 张泽凯孔杨刘华彦卢晗锋朱秋莲
Owner ZHEJIANG UNIV OF TECH
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