VOC purification separation method
A purification separation and molecular sieve technology, applied in the field of air purification, to achieve the effect of high purification efficiency, high process safety and low equipment investment
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Embodiment 1
[0034] The air containing 4.6mg / L benzene pollutants is passed into a structured fixed bed with an inner diameter of 2cm at a flow rate of 2L / min under 0.1MPa for purification and separation. The fixed bed is filled with a thickness of 4cm from the inlet end to the outlet end. The granular activated carbon (particle size is 0.9mm) adsorbent, 1cm thick microfiber coated activated carbon (particle size is 150-200μm) adsorption material and 1cm thick paper-like gradient metal microfiber composite CuO / 13X molecular sieve membrane catalytic material , The adsorbent is used to remove most of the benzene impurities in the air, and the catalyst loaded at the end of the fixed bed is used to catalyze the combustion of traces of unadsorbed benzene, so as to completely purify the harmful benzene vapor in the air.
[0035] Under the same conditions, the same thickness of granular adsorbents and catalysts are loaded in the fixed bed sequentially, that is, the granular activated carbon (0.9 m...
Embodiment 2
[0038] Air with a concentration of isopropanol of 1.5 mg / L is passed into fixed beds with different bed structures with an inner diameter of 2 cm at a flow rate of 2 L / min at 0.1 MPa for purification and separation. The fixed bed is from the inlet end to the outlet The end is loaded sequentially with granular activated carbon (bed height: 2.0-3.0cm) adsorbent with a particle size of 0.9mm, paper-like gradient metal microfiber composite ZSM-5 molecular sieve membrane (bed height: 1.0-0cm) adsorption material and 0.5 MnO with a particle size of 250-425 μm in cm thickness 2 / ZSM-5 molecular sieve granular catalyst, the adsorbent is used to remove most of the harmful substances of isopropanol, and the catalyst loaded at the end of the fixed bed is used to catalyze the combustion of isopropanol that is not completely adsorbed, so as to achieve the goal of purifying the air.
[0039] The adsorption and permeation curve results of isopropanol on the structured fixed bed and particle ...
Embodiment 3
[0041] Put the air containing 4.5mg / L isopropanol under 0.1MPa for 15279h -1 The space velocity is passed into fixed beds with different bed structures with an inner diameter of 1 cm for purification and separation. The fixed bed is sequentially filled with Co with a particle size of 250-425 μm from the inlet to the outlet 2 o 3 / ZSM-5 molecular sieve particles (bed heights are 1cm, 0.6cm, 0.2cm and 0cm) catalyst, paper-like gradient metal microfiber composite Co 2 o 3 / ZSM-5 molecular sieve membrane (the bed heights are 0cm, 0.4cm, 0.8cm and 1cm respectively) catalytic material and activated carbon particle adsorbent with a thickness of 0.5cm and a particle size of 0.9mm. The catalyst is used to remove most of the impurities at high temperature Propanol, the adsorbent packed at the end of the fixed bed is used to adsorb and remove the impurity of isopropanol that has not been completely combusted.
[0042] On the fixed bed (first 1cm height) of different bed structure, the...
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