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Gas-solid adsorption and photocatalytic reaction fixed bed reaction evaluation apparatus and method

A technology of photocatalytic reaction and fixed bed reaction, applied in chemical instruments and methods, separation methods, gas treatment, etc., to achieve the effects of mild reaction, large floor space and high economic benefits

Inactive Publication Date: 2017-08-22
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the lack of organic pollutant treatment technology in the prior art, the present invention proposes a new method of gas-solid adsorption and photocatalytic oxidation to purify organic pollutants in gas on the basis of adsorption and removal of organic pollutants. The combination of catalytic oxidation technology enables photocatalytic oxidation of organic pollutants, and finally achieves efficient and stable degradation of organic pollutants

Method used

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  • Gas-solid adsorption and photocatalytic reaction fixed bed reaction evaluation apparatus and method
  • Gas-solid adsorption and photocatalytic reaction fixed bed reaction evaluation apparatus and method
  • Gas-solid adsorption and photocatalytic reaction fixed bed reaction evaluation apparatus and method

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Embodiment 1

[0028] A proper amount of powdered one-component niobium molybdate solid catalyst is pretreated under certain conditions, and then loaded into the sample loading tube in the core reactor, and the sample loading height depends on the amount of catalyst used. The initial concentration of methane mixed gas containing ethanethiol is 50ppm, and the total flow rate of mixed gas containing mercaptan is 100mL min -1 , the airspeed T 0 >>1h -1 . Continuous online adsorption-continuous online reaction mode is adopted, that is, the left side of the six-way valve keeps 2-3, the left side of the four-way valve keeps 1-2, the right side of the four-way valve switches to 1-4, and the right side of the six-way valve takes samples at regular intervals Once, the light source (λ≥400nm) was started after the catalyst was saturated with adsorbed ethanethiol. The detection system of this embodiment is composed of GC-9790Ⅱ gas chromatograph, FPD detector, SE-30 type chromatographic column; settin...

Embodiment 2

[0035] An appropriate amount of powdered single-component niobium molybdate nanosheet solid catalyst is pretreated under certain conditions, and then loaded into the sample loading tube in the core reactor. The sample loading height depends on the amount of catalyst used. Reaction condition and method are with embodiment 1. The total amount of gaseous pollutants adsorbed by the single-component niobium molybdate nanosheet solid catalyst can be calculated by combining the known data and the experimentally measured data with the formula in Example 1, and the catalyst has photocatalytic activity under light, The experimental result of this embodiment is as Figure 4 As shown, from the calculation results and experimental phenomena, it can be concluded that the adsorption performance and photocatalytic performance of the catalyst are better than those of the catalyst in Example 1.

Embodiment 3

[0037] An appropriate amount of powdery two-component niobium molybdate nanosheet composite solid catalyst is pretreated under certain conditions, and then loaded into the sample loading tube in the core reactor. The sample loading height depends on the amount of catalyst used. Reaction condition and method are with embodiment 1. The total amount of gas pollutants adsorbed by the two-component niobium molybdate nanosheet composite solid catalyst can be calculated by the known data and experimental data combined with the formula in Example 1, and the catalyst has photocatalytic properties under light. activity, the experimental results of this embodiment are as Figure 5 As shown, it can be concluded from the calculation results and experimental phenomena that, compared with the catalysts in Example 1 and Example 2, the catalyst has better adsorption performance and photocatalytic performance.

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Abstract

The invention discloses a fixed bed reaction evaluation apparatus and method of gas-solid adsorption and photocatalytic reaction. The method is characterized in that the gas-solid adsorption is combined with the photocatalytic reaction, so that the weakness of the ordinary adsorption and static reaction can be effectively solved; and a gas-solid adsorption and photocatalytic reaction fixed bed reaction evaluation apparatus is provided on the basis of the method, and the evaluation apparatus can realize two kinds of adsorption (dynamic adsorption and pulse adsorption), two kinds of reaction (static reaction and dynamic reaction) and two detection ways (online detection and offline detection). The method comprises the following steps: gas-solid adsorption (absorbing gaseous pollutants by virtue of a catalyst until the catalyst is saturated), and photocatalytic reaction (catalytically oxidizing the catalyst with saturated adsorption until the reaction is completed). The fixed bed reaction evaluation apparatus and method have the advantages of integrating the dynamic adsorption, dynamic reaction and online detection and can remove the gas pollutants; and moreover, the catalyst has higher repeated utilization rate.

Description

technical field [0001] The invention belongs to the field of gas adsorption and photocatalytic reaction, and in particular relates to a fixed-bed reaction evaluation device and method for gas-solid adsorption and photocatalytic reaction. Background technique [0002] With the rapid advancement of urbanization and industrialization in our country, air pollution is becoming more and more serious. Therefore, rational development and utilization of energy and strengthening the control of environmental pollution are becoming the common concern of the world today. The 2016 "BP World Energy Outlook" shows that: fossil energy (oil, natural gas and coal) is still the dominant energy that provides power to the world economy, accounting for about 60% of the energy increase, and then, a large amount of sulfide, especially organic sulfide Exist in fossil energy, such as carbon disulfide (CS 2 ), carbonyl sulfide (COS), mercaptan, sulfide and thiophene, etc. These sulfur-containing organ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/72B01D53/04
CPCB01D53/04B01D53/8668B01D2255/20769B01D2255/802B01D2257/306B01D2259/80
Inventor 何杰朱继超胡丽芳
Owner ANHUI UNIV OF SCI & TECH
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