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Reaction device for preparing hydrogen through solar photocatalysis

A photocatalytic reactor and reaction device technology, applied in separation and collection devices, new reaction devices, and hydrogen purification fields, can solve the problems of limited light-receiving area, sedimentation of photocatalysts, and limited sunlight utilization, etc., to improve stability, The effect of improving the efficiency of photocatalytic reaction

Inactive Publication Date: 2014-06-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

This tubular reactor has the following disadvantages: (1) Due to the limitation of the outer surface area, the light-receiving area of ​​the traditional tubular photocatalytic reactor is limited, which greatly limits the utilization of focused sunlight; (2) the traditional tubular photocatalytic reactor The structure of the photocatalytic reactor is relatively simple, and it is easy to cause the photocatalyst to settle down from the reaction liquid, which not only seriously affects the efficiency of photocatalytic hydrogen production, but also greatly affects the stability of the photocatalytic reaction due to blockage.
[0004] Retrieval and review of relevant literature and patents found that there are currently many reports on photocatalytic decomposition of water and pollutants and hydrogen production from reformed biomass. However, due to the limitations of experimental equipment and other conditions, these systems generally adopt simple Solar concentrating device, without using a solar concentrating device with high-precision automatic sun tracking function, can not fully and efficiently use solar energy
In the field of photocatalysis, the application of new photocatalytic reactors is mainly limited to the photocatalytic degradation of organic pollutants, but there are no formal experiments on the use of new photocatalytic reactors to decompose water and pollutants and reform biomass to produce hydrogen. to report

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  • Reaction device for preparing hydrogen through solar photocatalysis
  • Reaction device for preparing hydrogen through solar photocatalysis

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: set the parameters of the high-precision automatic solar tracking system on the axial solar concentrator so that it can track the sun in real time. The linear parabolic concentrator on the axial solar concentrator has a width of 0.5 meters and a length of 4 meters, the width of the focused spot produced by it is 0.10m. The serpentine coil reactor is made of thin glass tubes with an outer diameter of 0.008 meters and an inner diameter of 0.006 meters and a total length of 50 meters. The outer diameter of the serpentine coil reactor is 0.08 meters and the length is 4 meters. The catalyst CdS concentration added to the system was 1.0 g / L, the reaction solution was deionized water, and the total volume was 12 L. The circulation rate of the reaction liquid is 60.2mL / min, and the average direct solar radiation is 480W / m 2 Under certain conditions, the device can realize continuous and stable hydrogen production, with an average hydrogen production rate of 0.66L...

Embodiment 2

[0030] Embodiment 2: set the parameters of the high-precision automatic solar tracking system on the axial solar concentrator so that it can track the sun in real time. The linear parabolic concentrator on the axial solar concentrator has a width of 0.5 meters and a length of 4 meters, the width of the focused spot produced by it is 0.10m. The serpentine coil reactor is made of thin glass tubes with an outer diameter of 0.008 meters and an inner diameter of 0.006 meters and a total length of 50 meters. The outer diameter of the serpentine coil reactor is 0.08 meters and the length is 4 meters. The concentration of catalyst CdS added in the system is 1.0g / L, and the reaction solution is Na 2 S and Na 2 SO 3 The mixed solution, the concentration is 0.5mol / L, the total volume is 12L. The circulation rate of the reaction liquid is 60.2mL / min, and the average direct solar radiation is 480W / m 2 Under certain conditions, the device can realize continuous and stable hydrogen produ...

Embodiment 3

[0031] Embodiment 3: set the parameters of the high-precision automatic solar tracking system on the axial solar concentrator so that it can track the sun in real time. The linear parabolic concentrator on the axial solar concentrator has a width of 0.5 meters and a length of 4 meters, the width of the focused spot produced by it is 0.10m. The serpentine coil reactor is made of thin glass tubes with an outer diameter of 0.008 meters and an inner diameter of 0.006 meters and a total length of 50 meters. The outer diameter of the serpentine coil reactor is 0.08 meters and the length is 4 meters. The concentration of the catalyst P25 added in the system is 2.0g / L, the reaction solution is a methanol solution, the concentration is 5.0mol / L, and the total volume is 12L. The circulation rate of the reaction liquid is 60.2mL / min, and the average direct solar radiation is 480W / m 2 Under certain conditions, the device can realize continuous and stable hydrogen production, with an aver...

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Abstract

The invention discloses a novel reaction device for preparing hydrogen through solar photocatalysis. A light source adopts sunshine gathered by a shaft type sun focuser; the shaft type sun focuser mainly comprises a linear paraboloid condenser and an automatic sun tracking system or only consists of a linear paraboloid condenser; a snake-shaped coil pipe type reactor is arranged at a center light spot of the linear paraboloid condenser; a circulating water cooling device is additionally arranged around the snake-shaped coil pipe type reactor. Under the action of the condensed sunshine, reaction liquid fully mixed with a catalyst is subjected to photocatalysis reaction in the snake-shaped coil pipe type reactor; generated hydrogen is finally subjected to detection and collection after being subjected to gas-liquid separation and being purified by a filter. The reaction system realizes full mixing of the catalyst and the reaction liquid on the premise of utilizing sunshine to the greatest extent and has the advantages of reasonable manufacturing cost, high reaction rate, convenience in operation and stable running.

Description

technical field [0001] The invention belongs to the field of large-scale preparation of renewable energy, and relates to a photocatalytic decomposition of water and pollutants under direct solar light, and a device for hydrogen production, hydrogen purification, separation and collection by reforming biomass, in particular to a device for producing hydrogen by using solar photocatalysis A novel reaction device for hydrogen. Background technique [0002] Hydrogen has become the most promising new energy in the 21st century because of its clean, efficient, high calorific value, and environmental friendliness. Although there is still a long time before hydrogen energy can be widely used, its research and development are of great significance for solving the energy problems faced by human beings in sustainable development. Converting solar energy to hydrogen can form a virtuous energy system. Scientists have described an ideal hydrogen energy system: using solar energy to spli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/12C01B3/04
CPCY02E60/36
Inventor 李灿杨民蒋宗轩刘铁峰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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