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A preparation method of an adsorbent with strong adsorption capacity for small molecule hydrocarbons

A small molecule hydrocarbon and adsorbent technology, applied in chemical instruments and methods, other chemical processes, silicates, etc., can solve problems such as weak adsorption force, and achieve strong adsorption capacity, high thermal stability, and high removal efficiency. Effect

Active Publication Date: 2020-08-18
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that existing activated carbon adsorbents have weak adsorption capacity for small molecular hydrocarbons and insufficient removal of methane, ethane, etc., the purpose of the present invention is to provide a preparation of an adsorbent with strong adsorption capacity for small molecular hydrocarbons method, the obtained adsorbent has strong adsorption capacity for small molecular hydrocarbons such as methane and ethane, high removal efficiency for small molecular hydrocarbons in crude oil and gas, and good heat transfer performance, avoiding the risk of heat accumulation and combustion of activated carbon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method for an adsorbent with strong adsorption capacity for small molecule hydrocarbons, comprising the following steps:

[0025] (1) Grind the mordenite to a particle size of 0.5 mm, then dip it in a weak acid solution for 4 times, each time for 30 minutes, the weak acid solution used is 0.5 mol / L acetic acid solution, and the volume ratio of mordenite to weak acid solution is 1 :8, the impregnated mordenite particles are rinsed with water until the pH value of the rinse solution=6.5 and then dried;

[0026] (2) Add lignosulfonate, lignin powder, nano-graphene oxide powder and water-soluble chitosan to 3wt% nitric acid solution in sequence and stir evenly to obtain a mixture liquid, mordenite particles, nitric acid solution, lignin sulfonate The mass ratio of acid salt, lignin powder, nanometer graphene oxide powder and water-soluble chitosan is 1:12:0.2:0.2:0.4:0.3, wherein used lignosulfonate is sodium lignosulfonate;

[0027] (3) Add the mordenite par...

Embodiment 2

[0032] A preparation method for an adsorbent with strong adsorption capacity for small molecule hydrocarbons, the difference from Example 1 is:

[0033] The lignin powder is used after being modified by the following process: soak the lignin in 15wt% hydrogen peroxide solution at 25°C for 20 minutes and apply ultraviolet radiation, then rinse the lignin with water and dry, the power of ultraviolet radiation is 10W;

[0034] Nano-graphene oxide powder is used after modification by the following process: mix graphene oxide and distilled water at a mass ratio of 1:1.3 and disperse evenly by ultrasonic, then add 2 times the volume of an ethanol solution with a volume fraction of 18%, and then add 0.3 times Dodecyldimethylbenzyl ammonium chloride surfactant with graphene oxide quality was stirred and ultrasonicated for 60 minutes, then heated to 70°C for 150 minutes to obtain the reactant, which was repeatedly washed with deionized water and absolute ethanol until no chloride ions ...

Embodiment 3

[0037] A preparation method for an adsorbent with strong adsorption capacity for small molecule hydrocarbons, comprising the following steps:

[0038] (1) Grind the mordenite to a particle size of 0.7 mm, and then dip it in a weak acid solution for 5 times, each time for 40 minutes. The weak acid solution used is 0.4 mol / L acetic acid solution, and the volume ratio of mordenite to weak acid solution is 1 : 9, the impregnated mordenite particles are rinsed with water until the pH value of the rinse solution=7 and then dried;

[0039] (2) Add lignosulfonate, lignin powder, nano-graphene oxide powder and water-soluble chitosan to the 4.5wt% nitric acid solution in sequence and stir evenly to obtain a mixture liquid, mordenite particles, nitric acid solution, lignin The mass ratio of sulfonate, lignin powder, nanographene oxide powder and water-soluble chitosan is 1:14:0.35:0.35:0.55:0.45, and the lignosulfonate used is lignosulfonate amine;

[0040] (3) Add the mordenite particl...

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Abstract

The invention relates to the technical field of treatment of crude oil vapor and specifically relates to a preparation method of an adsorbing agent with strong adsorption capacity for micromolecule hydrocarbon. The preparation method comprises the following steps: grinding mordenite and putting the grinded mordenite into a weak acid solution for soaking; adding lignosulfonate, a lignin powder, a nano graphene oxide powder and water soluble chitosan into a dilute nitric acid solution, uniformly stirring the mixture to obtain a mixed liquor, and adding mordenite particles into the mixed liquor;heating for drying, and calcining under an oxygen insulation condition at the temperature of 180-210 DEG C; naturally cooling the modified mordenite, taking out the cooled mordenite and grinding the cooled mordenite into a powder with the particle size of 0.1-0.2mm, so as to obtain the adsorbing agent. The adsorbing agent prepared by the method is strong in adsorption capacity for the micromolecule hydrocarbon, such as methane, ethane and the like, high in removal efficiency of the micromolecule hydrocarbon in the crude oil vapor, good in heat transfer property and high in heat stability.

Description

technical field [0001] The invention relates to the technical field of crude oil and gas treatment, in particular to a preparation method of an adsorbent with strong adsorption capacity for small molecular hydrocarbons. Background technique [0002] Oil and gas recovery refers to the collection of volatilized gasoline and oil vapor during the process of loading and unloading gasoline and refueling vehicles, so as to prevent air pollution caused by volatilization of oil and gas, eliminate potential safety hazards, reduce economic losses, and obtain considerable returns. At present, common methods include absorption method, condensation method, membrane separation method and adsorption method. The existing absorption method generally uses lean oil such as diesel oil as absorbent, and the recovery efficiency is low; the condensation method uses refrigeration technology to directly convert the oil and gas components from the gas phase to the liquid phase, but the investment is h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/32
CPCB01J20/165B01J20/3204
Inventor 王北福朱根民聂立宏周婧也张明强
Owner ZHEJIANG OCEAN UNIV