Experimental system and method for preparing methanol from carbon dioxide by photocatalysis
A carbon dioxide, experimental system technology, applied in the field of photocatalysis, can solve the problems of experimental error, device instability, affecting the results of the reaction process, etc., and achieve the effects of reducing methanol escape problems, improving work efficiency, and strongly disturbing effects.
Pending Publication Date: 2019-08-06
XI AN JIAOTONG UNIV
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] In the research process of the photocatalytic carbon dioxide reduction reaction, the existing reaction system fails to meet the conditions for online detection of the type and content of the product. It is the result, and in the photocatalytic reaction that requires the use of catalysts for catalytic reactions, due to insufficient contact or fusion between the catalyst and the solution, more solid particles will settle at the bottom of the container under the action of gravity, and external light cannot reach The uniformity of the device affects the photocatalytic reaction and even the photocatalytic reaction efficiency, resulting in a decrease in catalytic performance
Moreover, the existing photocatalytic experimental system basically does not adopt the method of online monitoring, and the detection of the reaction liquid after the end of the experiment will cause the measured methanol content in the reaction liquid to be different from the actual one due to the volatilization and transformation of organic matter, resulting in experimental errors
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] First, the reaction of photocatalytic carbon dioxide to methanol production in the present invention is described:
[0030] The photocatalytic reduction of carbon dioxide to methanol needs to be completed by the catalysis of semiconductor catalysts. The nature of semiconductors determines that this material does not have continuous energy levels like metal conductors, but has empty energy level regions. This kind of structure is called the energy band structure, that is, it consists of a high-energy conduction band (Conduction Band, CB) and a low-energy valence band (Valence Band, VB). The gap between the lowest end of the conduction band and the uppermost end of the valence band is the band gap. In the process of photocatalysis, when the semiconductor is irradiated by light and its energy is greater than the forbidden band width (Eg), the electrons in the valence band are excited by the energy of photons, and can cross the forbidden band to reach the conduction band, ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an experimental system and method for preparing methanol from carbon dioxide by photocatalysis. The carbon dioxide is converted to methanol by photocatalysis, and reaction products can be detected online in the experimental process. The system comprises a reaction device part, a gas conveying part, a liquid circulation part and a reactant detection part. According to the system and method, magnetic stirring is used, a jet pipe of a liquid circulation inlet pipe is designed, disturbance of the liquid and catalyst in the reaction device can be improved, and the working efficiency of the catalyst is improved; and in the experimental process, a reaction liquid can be taken from a liquid taking port and injected into a gas chromatograph at any time for detection, the content of methanol generated by reaction can be monitored in real time, and the sensitivity of reaction is improved.
Description
technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to an experimental system and method for producing methanol from photocatalytic carbon dioxide. Background technique [0002] In the research process of the photocatalytic carbon dioxide reduction reaction, the existing reaction system fails to meet the conditions for online detection of the type and content of the product. It is the result, and in the photocatalytic reaction that requires the use of catalysts for catalytic reactions, due to insufficient contact or fusion between the catalyst and the solution, more solid particles will settle at the bottom of the container under the action of gravity, and external light cannot reach The uniformity of the device affects the photocatalytic reaction and even the photocatalytic reaction efficiency, resulting in a decrease in catalytic performance. Moreover, the existing photocatalytic experimental system basically do...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/025
Inventor 周屈兰武小敏李娜张文斐
Owner XI AN JIAOTONG UNIV