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Desulfurization adsorption agent used for gasoline and gasoline desulfurization method

An adsorbent and gasoline technology, applied in the field of desulfurization adsorbent, can solve the problems of harsh operating conditions, low selectivity, complex desulfurization agent process, etc., and achieve the effects of mild process operating conditions, simple regeneration method and good desulfurization effect.

Inactive Publication Date: 2015-06-03
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The desulfurizer has low selectivity to sulfur, limited sulfur capacity, and short adsorbent life
[0009] In summary, the adsorption desulfurizers in the prior art generally have the following deficiencies: 1. The desulfurization depth is not enough, and it is difficult to desulfurize below 5 ppmw; 2. The specific surface area of ​​the adsorbent is low, and the adsorption capacity of sulfur is relatively limited; 3. Desulfurization The operating conditions of the process are harsh and consume a lot of energy, and the operating cost is high; 4. The desulfurization process is not friendly to the environment; 5. The selectivity of the desulfurizer is low and the service life is short; 6. The regeneration process of the desulfurizer is complex
So far, there is no adsorption desulfurizer that can overcome the above-mentioned shortcomings.

Method used

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  • Desulfurization adsorption agent used for gasoline and gasoline desulfurization method
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  • Desulfurization adsorption agent used for gasoline and gasoline desulfurization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Preparation of alkali-treated molecular sieve and activated carbon

[0041] After heating two 500mL NaOH solutions with a concentration of 0.3mol / L in a water bath to about 70°C, add 25g of ZSM-5 molecular sieve and 25g of activated carbon to them respectively, stir for about 200 minutes, and immediately cool the mixture in an ice bath. to normal temperature, filter and wash the filter cake with deionized water for several times until the pH value of the filtrate is about 7, then place the obtained filter cake in an oven at 110°C for 4 hours to obtain alkali-treated ZSM- Type 5 molecular sieve and activated carbon treated with alkali; Among them, the adsorption-desorption isotherms and pore size distribution curves of ZSM-5 molecular sieve before and after alkali treatment are shown in figure 1 and figure 2 .

[0042] In addition, ASAP2000 automatic physical adsorption instrument was used to measure the specific surface area and pore size distribution of ZSM-5 mol...

Embodiment 2

[0055] 1. Preparation of alkali-treated molecular sieve and activated carbon

[0056] After raising the temperature of two 500mL NaOH solutions with a concentration of 0.2mol / L in a water bath to about 80°C, add 25g of Y-type molecular sieve and 25g of activated carbon to them respectively, stir for about 120 minutes, and immediately cool the mixture to room temperature in an ice bath , filter and wash the filter cake with deionized water for several times until the pH value of the filtrate is about 7, then place the obtained filter cake in an oven at 120°C for 3 hours to obtain alkali-treated Y-type molecular sieve and The specific surface area and pore size distribution of alkali-treated activated carbon; Y-type molecular sieve and activated carbon are shown in Table 2.

[0057] Table 2 Specific surface area and pore size of Y-type molecular sieve and activated carbon

[0058]

[0059] 2. Preparation of composite carrier

[0060] The above alkali-treated Y-type molecula...

Embodiment 3

[0066] 1. Preparation of alkali-treated molecular sieve and activated carbon

[0067] After raising the temperature of two 500mL NaOH solutions with a concentration of 0.3mol / L in a water bath to about 80°C, add 25g of X-type molecular sieve and 25g of activated carbon to them respectively, stir for about 180 minutes, and immediately cool the mixture to room temperature in an ice bath , filter and wash the filter cake with deionized water for several times until the pH value of the filtrate is about 7, then place the obtained filter cake in an oven at 100°C for 6 hours to obtain alkali-treated X-type molecular sieve and Alkali-treated activated carbon.

[0068] 2. Preparation of composite carrier

[0069] The above alkali-treated X-type molecular sieve and alkali-treated activated carbon were mixed at a mass ratio of 30:70, ground into powder in a mortar, and then dried in an oven at 120°C for 6 hours to obtain a composite carrier.

[0070] 3. Preparation of desulfurization ...

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Abstract

The invention provides a desulfurization adsorption agent used for gasoline and a gasoline desulfurization method. The desulfurization adsorption agent is obtained by taking a molecular sieve treated by an alkali and active carbon as compound carriers, and loading active metal components, wherein active metal is selected from one or more of elements in IA, IIA, VIII, IB, IIB and VIB groups in a periodic table. The desulfurization adsorption agent has a large sulfur capacity and long service life; and furthermore, a regeneration method is simple.

Description

technical field [0001] The invention relates to a desulfurization adsorbent, in particular to a desulfurization adsorbent for gasoline and a desulfurization method for gasoline. Background technique [0002] About 70% of my country's commercial gasoline comes from the heavy oil catalytic cracking process. Since heavy oil raw materials contain a large amount of sulfur, nitrogen, oxygen heteroatom compounds and colloidal asphaltenes, catalytic cracking gasoline not only has a high sulfur content, but also contains a large amount of olefin components , More than 90% of the sulfur in commercial gasoline comes from catalytic cracking gasoline, which makes the sulfur content of gasoline in my country far exceed that in foreign gasoline. Therefore, how to reduce the sulfur content in FCC gasoline is the key to reducing the sulfur content in commercial gasoline. In particular, on January 1, 2018, the National V gasoline quality standard that is about to be implemented nationwide sti...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/34B01J20/32B01J20/30C10G25/05
Inventor 赵亮高金森徐春明韩晓娜
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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