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Preparation method of porous modified activated carbon-aluminum oxide composite desulfurization adsorbent

A composite adsorption and alumina technology is applied in the preparation of porous modified activated carbon-alumina composite desulfurization adsorbents, and the preparation of porous modified activated carbon-alumina-based desulfurization adsorbents, which can solve the problem of single sulfide selectivity and temporary No problems such as adsorption of sulfide were found, and the effect of improving adsorption and removal capacity, changing easy pulverization, and improving desulfurization efficiency was achieved.

Pending Publication Date: 2021-03-02
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing desulfurization adsorbents have strong adsorption capacity, they have a single selectivity for sulfides, and no strong adsorbents have been found that can adsorb large and small molecular sulfides under different working environments and achieve efficient removal of sulfides under mild reaction conditions.

Method used

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  • Preparation method of porous modified activated carbon-aluminum oxide composite desulfurization adsorbent
  • Preparation method of porous modified activated carbon-aluminum oxide composite desulfurization adsorbent
  • Preparation method of porous modified activated carbon-aluminum oxide composite desulfurization adsorbent

Examples

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Effect test

Embodiment 1

[0037] Example 1: Deep adsorption desulfurization of sulfur-containing fuel oil in a refinery in Fushun City, Liaoning Province

[0038] Treatment object: Sulfur-containing fuel oil from a refinery in Fushun City, Liaoning Province, with a sulfur content of 15ppm, of which thiophene sulfides account for about 70% of the sulfur content, and mercaptans and mercaptans account for about 30% of the sulfur content.

[0039] Preparation of porous modified activated carbon-alumina composite adsorbent: using the method described in the present invention, weigh 500 g of alumina molecular sieve and 100 g of activated carbon, and soak the raw material alumina molecular sieve and activated carbon in ethanol solution and acetone solution for 3 hours, Then transfer it to an ultrasonic cleaner for ultrasonic cleaning for 30 minutes, dry it in an incubator at 60°C for 10 hours, take it out for use; add 500 mL of 1mol / L copper nitrate to the pre-cleaned alumina molecular sieve , 500mL mol / L cad...

Embodiment 2

[0041] Example 2: Deep removal of hydrogen sulfide in a natural gas product produced by a natural gas company in Shanghai

[0042] Target of treatment: A natural gas product produced by a natural gas company in Shanghai, containing hydrogen sulfide content of 8000ppm-12000ppm.

[0043] Preparation of porous modified activated carbon-alumina composite adsorbent: using the method described in the present invention, weigh 200 g of alumina molecular sieve and 100 g of activated carbon, and soak the raw materials of alumina molecular sieve and activated carbon in ethanol solution and acetone solution for 3 hours, Then transfer it to an ultrasonic cleaner for ultrasonic cleaning for 30 minutes, dry it in an incubator at 60°C for 8 hours, take it out for use; add 200 mL of 1 mol / L copper nitrate to the pre-cleaned alumina molecular sieve , 200mL of 1mol / L cadmium chloride solution, heated and refluxed for 3 hours, washed and filtered with distilled water for 3 times, dried in a const...

Embodiment 3

[0045] Example 3: Adsorption and Removal of Blast Furnace Gas Sulfides of a Steel Co., Ltd. in Hebei Province

[0046] Object of treatment: The blast furnace gas of a steel company in Hebei Province contains sulfides, which are mainly divided into organic sulfur and inorganic sulfur. Organic sulfur (COS, C 2 S) content is about 80-140mg / Nm 3 , inorganic sulfur (H 2 S) content is about 25-45mg / Nm 3 .

[0047] Preparation of porous modified activated carbon-alumina composite adsorbent: using the method described in the present invention, weigh 500g of alumina molecular sieve and 200g of activated carbon, and soak the raw materials of alumina molecular sieve and activated carbon in ethanol solution and ketone solution for 4 hours , and then transferred to an ultrasonic cleaner for ultrasonic cleaning for 30 minutes, dried in a thermostat at 60°C for 10 hours, and taken out for use; add 500 mL of 1mol / L nitric acid to the pre-cleaned alumina molecular sieves Copper, 500mL of 1...

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Abstract

The invention relates to a preparation method of a porous modified activated carbon and aluminum oxide composite adsorbent for efficient desulfurization. The preparation method comprises the followingsteps: firstly, taking aluminum oxide and activated carbon as base materials, taking copper nitrate, cadmium chloride, ferric trichloride and potassium iodate as modifiers, and respectively carryingout chemical and physical modification on the aluminum oxide and the activated carbon, copper and cadmium ions have pi complexing action of and oxidability of the ferric trichloride and the potassiumiodate, the modified aluminum oxide and activated carbon have high selectivity to large and small molecular sulfides such as mercaptan and hydrogen sulfide, and finally, the material is mixed and ground with polyacrylamide, absolute ethyl alcohol is added to be stirred to be viscous, and steps of sintering, washing and drying are carried out to obtain the porous modified activated carbon and aluminum oxide composite adsorbent. The composite adsorbent prepared by chemical and physical modification methods can efficiently remove sulfides in industrial products, and has the advantages of wide application range, strong applicability, large adsorption capacity and the like.

Description

technical field [0001] The invention relates to a preparation method of a porous modified activated carbon-alumina composite desulfurization adsorbent, in particular to a preparation method of a porous modified activated carbon-alumina-based desulfurization adsorbent which can be used for efficient desulfurization. The invention belongs to the technical field of adsorption desulfurization. Background technique [0002] With the rapid development of today's society and economy, fuel chemical industry, petrochemical industry, metallurgical engineering and other industrial fields have become an indispensable part of human society, and sulfide in industrial production has also brought a wide range of damage to the natural and human environment. pollute. For example, people's demand for cars is increasing year by year, resulting in a substantial increase in fuel consumption, and the sulfur compounds produced during the combustion of sulfur-containing fuel will cause acid rain, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C10G25/00C10L3/10
CPCB01J20/20B01J20/08C10G25/00C10L3/103C10G2300/202
Inventor 白志山阎世杰王炳捷李辉张城
Owner EAST CHINA UNIV OF SCI & TECH
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