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Preparation method of solid adsorption material for biogas decarburizing purification

A solid adsorption material and biogas technology, applied in gaseous fuels, chemical instruments and methods, fuels, etc., can solve the problems of low adsorption capacity and inability to avoid chemical deactivation, and achieve simple preparation methods, high stability, slow down deactivation, etc. live question effect

Active Publication Date: 2018-08-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The two methods can improve the thermal stability of the material, but cannot avoid the influence of chemical inactivation, and because the grafting method is limited by the number of groups on the surface of the carrier, and the high molecular weight organic amine is limited by the gas diffusion resistance, the adsorption capacity of the material is limited. low

Method used

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  • Preparation method of solid adsorption material for biogas decarburizing purification
  • Preparation method of solid adsorption material for biogas decarburizing purification
  • Preparation method of solid adsorption material for biogas decarburizing purification

Examples

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Embodiment 1

[0029] A preparation method of solid adsorption material applied to biogas decarbonization and purification, including the following steps:

[0030] 1) Pretreatment of NKA-9: Pack NKA-9 in the resin column, wash with deionized water at a flow rate of 2BV / h, 1BV is 1 resin column volume, until the effluent does not have white turbidity; then use 0.2mol / L HNO 3 Soak the solution for 4 hours; then wash with deionized water at a flow rate of 2BV / h until the effluent pH is neutral; dry the washed NKA-9 in an oven at 105°C until the weight no longer changes;

[0031] 2) Weigh 0.8g of BPEI with a molecular weight of 1200Da and dissolve it in 30mL of anhydrous methanol; Weigh 2.0g of pretreated NKA-9, pour it into the BPEI solution, and then add 10mL of anhydrous methanol to rinse the container wall The above NKA-9; the system is magnetically stirred at 350 rpm at 50°C for 5-8 hours, until the solvent is completely evaporated; then the residue is placed in a vacuum drying oven, vacuum dri...

Embodiment 2

[0040] According to the same preparation method in Example 1, except that the weighed amount of 1200 Da BPEI was changed from 0.8 g to 1.2 g, everything else was the same. A solid adsorption material with a weight ratio of 0.6 between BPEI and NKA-9 was prepared and subjected to ten adsorption-desorption cycle tests.

Embodiment 3

[0042] According to the same preparation method in Example 1, except that the weighed amount of 1200 Da BPEI was changed from 0.8 g to 1.6 g, everything else was the same. A solid adsorption material with a mass ratio of 0.8 of BPEI and NKA-9 was prepared, and the adsorption-desorption cycle test was performed ten times.

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Abstract

Disclosed is a preparation method of a solid adsorption material for biogas decarburizing purification. The preparation method includes pretreating NKA-9, to be specific, filling a resin column with NKA-9, washing NKA-9 with deionized water until generating out-flowing water without any white turbidity; soaking NKA-9 with HNO3 solution, washing NKA-9 with deionized water until generating out-flowing water with neutral pH value; drying cleaned NKA-9 in an oven until its weight is constant; loading organic amine to NKA-9; weighing BPEI, dissolving BPEI completely with stirring at the room temperature by taking absolute methanol as a solvent; weighing pretreated NKA-9 and pouring the same into BPEI dissolved solution, further adding absolute methanol to wash NKA-9 on the wall of a container;stirring systematically until the solvent volatilizes completely; subjecting residues to vacuum drying in a vacuum drying box to obtain the solid adsorption material. The solid adsorption material hashigh adsorption capacity and high stability in adsorption-desorption circulation.

Description

Technical field [0001] The invention relates to the technical field of biogas decarbonization and purification, in particular to a preparation method of solid adsorption materials applied to biogas decarbonization and purification. Background technique [0002] Anaerobic fermentation technology has an important application in the treatment of organic solid wastes, biologically decomposing organic solid wastes such as kitchen waste, fruit and vegetable waste, livestock and poultry manure, and sludge under anaerobic conditions. As a mixed gas produced in the anaerobic fermentation process, biogas is mainly composed of methane CH 4 And carbon dioxide CO 2 , Including some minor components such as hydrogen sulfide H 2 S, ammonia NH 3 , Carbon monoxide CO, moisture H 2 O etc. The composition ratio of biogas will vary with the source of biogas and anaerobic fermentation substrate. However, the volume ratio of methane in most biogas is in the range of 55-70%. CO 2 The ratio is about 30%...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C10L3/10
CPCB01J20/22B01J20/26C10L3/104Y02C20/40
Inventor 蒋建国孟园徐一雯颜枫高语晨
Owner TSINGHUA UNIV
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