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Absorbent for absorbing and separating polyaromatic hydrocarbon in diesel and preparation method thereof

A technology for adsorption and separation of polycyclic aromatic hydrocarbons, applied in chemical instruments and methods, refined hydrocarbon oil, petroleum industry, etc., can solve the problem of small saturated adsorption capacity of adsorbents, poor selectivity of aromatic hydrocarbon adsorbents, unsuitable for adsorption and separation of polycyclic aromatic hydrocarbons, etc. problem, to achieve the effect of reducing polycyclic aromatic hydrocarbons and high selectivity

Active Publication Date: 2016-02-03
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, polycyclic aromatic hydrocarbon adsorbents are mainly used for the adsorption and separation of trace polycyclic aromatic hydrocarbons in the atmosphere or water, and the saturated adsorption capacity of the adsorbent is small, while the aromatic hydrocarbon adsorbents for coal liquefied oil have poor selectivity, and are easy to adsorb single-ring aromatic hydrocarbons in diesel oil , not suitable for adsorption and separation of polycyclic aromatic hydrocarbons in diesel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) First, 1000g of dilute water glass solution with a concentration of 16.8% (mass fraction of sodium silicate) was kept at 50°C for half an hour, and slowly added 340g of dilute sulfuric acid solution with a mass fraction of 12% to adjust the pH value to 6.5-7.0 , aged at 50°C for 3 hours after forming a sol, filtered and washed, dried at 100-120°C for 12 hours, and then calcined at 550°C for 4 hours to obtain carrier silica gel.

[0040] (2) Modulation of silica gel pore size: Weigh 6.88g of sodium hydroxide (Sinopharm Chemical Reagent Co., Ltd., analytically pure, 96wt%) and dissolve it in 500ml of deionized water, take 500ml of sodium hydroxide solution, stir evenly at 60°C, slowly Add 100g of the carrier silica gel in step (1), stir at 60°C for 6 hours, filter and wash to pH = 7-8, dry at 100-120°C for 12 hours, and roast at 550°C for 4 hours to obtain the modified Silica gel.

[0041] (3) Metal modification: 4.19g copper nitrate metal salt (Cu(NO 3 ) 2 ·3H 2 ...

Embodiment 2

[0044] (1) The synthesis of the carrier silica gel is the same as in Example 1.

[0045] (2) Modulation of silica gel pore size: Weigh 16.5g of concentrated sulfuric acid (98%, analytically pure, 96wt%) and dilute to 500ml with deionized water, take 500ml of sulfuric acid solution, stir evenly at 60°C, slowly add 100g of step (1) Carrier silica gel, the modification conditions are the same as in Example 1,,.

[0046] (3) Metal modification is the same as in Example 1.

[0047] (4) The performance evaluation of the adsorbent is the same as in Example 1, and the evaluation of the adsorbent is shown in Table 2.

Embodiment 3

[0049] (1) The synthesis of the carrier silica gel is the same as in Example 1.

[0050] (2) Modulation of silica gel pore size: take 500 ml of deionized water, stir evenly at 60° C., slowly add 100 g of the carrier silica gel in step (1), and the modification conditions are the same as in Example 1.

[0051] (3) Metal modification is the same as in Example 1.

[0052] (4) The performance evaluation of the adsorbent is the same as in Example 1, and the evaluation of the adsorbent is shown in Table 2.

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PUM

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Abstract

The invention discloses an absorbent for absorbing and separating polyaromatic hydrocarbon in diesel and a preparation method thereof. The absorbent is characterized by comprising silica gel capable of adjusting an aperture or metal-loaded modified silica gel. The preparation method of the absorbent comprises the following steps: (1) mixing a sodium silicate solution with inorganic acid to form glue, and aging, washing and drying the glue to obtain high-purity silica gel; (2) washing the silica gel by utilizing an appropriate amount of alkaline solution or inorganic acid solution, and directionally adjusting pores of the silica gel; and (3) contacting the silica gel with a metal solution to perform metal modification, and preparing the silica gel or metal modified silica gel absorbent. The absorbent has high adsorption capacity for the polyaromatic hydrocarbon in the diesel, can effectively absorb and separate the polyaromatic hydrocarbon in the diesel and is relatively high in selectivity and reusable.

Description

technical field [0001] The invention relates to an adsorbent for adsorbing and separating polycyclic aromatic hydrocarbons in diesel oil and a preparation method thereof. Background technique [0002] Polycyclic aromatic hydrocarbons refer to aromatic compounds containing two or more benzene rings, including naphthalene, anthracene, phenanthrene, pyrene and other compounds, which are widely present in diesel oil. Studies have shown that polycyclic aromatic hydrocarbons in diesel have a low cetane number and poor combustion performance, which is one of the main reasons for the formation of PM2.5 particulate matter in diesel vehicle exhaust, and the particulate matter containing polycyclic aromatic hydrocarbons is toxic, mutagenic and carcinogenic sex. With the improvement of environmental protection standards, the standards of diesel for vehicles are also increasing. my country has formulated and promulgated National III, National IV, and National V diesel standards. my coun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30C10G25/00
Inventor 李滨范景新臧甲忠潘月秋赵训志于海斌聂玲丽张健李健张雪梅成宏
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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