Preparation method of modified active carbon-based gasoline desulfurization adsorbent

An activated carbon adsorption and activated carbon technology, applied in chemical instruments and methods, refined hydrocarbon oil, petroleum industry, etc., can solve the problems of increasing particle pollutant emissions, reducing catalytic activity, and aggravating urban environmental pollution. The effect of high adsorption and removal capacity and simple and easy preparation method

Inactive Publication Date: 2013-06-12
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology

In addition, sulfur oxides can also corrode and damage engine components, poison motor vehicle exhaust gas treatment catalysts, reduce their catalytic activity, increase the emission of particulate pollutants, and aggravate urban environmental pollution

Method used

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Embodiment

[0026] Activated carbon adsorbent loaded with iron ions was prepared, and thiophene in cyclohexane solution was adsorbed. First, wash the activated carbon with distilled water before use, then wash it with 0.1 mol / L sodium hydroxide, then wash it with water, then wash it with 0.1 mol / L nitric acid, and finally wash it with distilled water until it is neutral. Dry for 12h. The dried activated carbon was mixed with nitric acid solution with a mass fraction of 68%, condensed and refluxed at 80°C for 3h, the reflux product was washed with distilled water until neutral, and dried at 100°C for 24h. After drying, the dried activated carbon was placed in a vacuum tube furnace under N 2 Under the atmosphere, the temperature was raised to 500°C at a rate of 3°C / min, kept at this temperature for 4 hours, and then lowered to room temperature at the same rate after the calcination was completed. Take out the calcined activated carbon, mix it with ferric nitrate solution with a concentrat...

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Abstract

The invention discloses a preparation method of a modified active carbon-based gasoline desulfurization adsorbent, and relates to a preparation method of a gasoline deep desulfurization adsorbent. The adsorbent is a Fe ion-loaded active carbon adsorbent; and the preparation method comprises the following steps of: performing cleaning pretreatment of the raw material of the adsorbent carrier particles; drying the pretreated carrier particles, mixing the carrier particles with a nitric acid solution, performing backflow and electromagnetic stirring; washing the oxidized carrier particles; drying the carrier particles; roasting to modify the dried particles; and steeping the carrier particles and a soluble ferric salt solution; drying the steeped carrier particles; and roasting to activate the dried particles. The preparation process is simple and easy to implement and realizes easy regeneration; the service life of the adsorbent is long; the adsorbent has high adsorption capacity and adsorption selectivity on thiophene and derivatives thereof in gasoline; the adsorption process is performed in a normal-temperature normal-pressure condition, and the operation cost is low; and no pollutant is generated in the adsorption process, good economic practicability is realized, and environmental protection requirements are met.

Description

technical field [0001] The invention relates to a preparation method of a gasoline deep desulfurization adsorbent, in particular to a preparation method of a modified active carbon-based gasoline desulfurization adsorbent. Background technique [0002] The ultra-deep desulfurization of gasoline has become an important problem to be solved worldwide. The combustion of sulfur in gasoline produces sulfur oxides (SO x ) is one of the main pollutants in the atmosphere, and its discharge into the air will form acid rain and destroy the ecological environment. In addition, sulfur oxides can also corrode and damage engine components, poison motor vehicle exhaust gas treatment catalysts, reduce their catalytic activity, increase the emission of particulate pollutants, and aggravate urban environmental pollution. Therefore, limiting sulfur content is an important indicator in automotive standards and a key factor in evaluating the cleanliness of gasoline. [0003] Adsorption desulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C10G25/00
Inventor 张志刚李文秀张振科范俊刚张华马研研
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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