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Method for regenerating desulfurizing and denitrogenating adsorbant

An adsorbent and denitrification technology, which is applied in the biological field, can solve the problems of oil combustion value loss, large solvent consumption, inability to completely remove sulfides and nitrides, etc., and achieve the effect of low energy consumption and convenient method

Inactive Publication Date: 2007-11-14
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the incomplete desulfurization and denitrification when using high-temperature roasting regenerated desulfurization and denitrification adsorbent in the prior art, which will cause the loss of oil combustion value, and the use of solvent extraction needs to consume a large amount of solvent and cannot completely remove sulfide and nitrogen compounds, and the solvent needs to be reprocessed, so as to provide a convenient adsorbent regeneration method with high desulfurization and nitrogen removal efficiency and without affecting the properties of the adsorbent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1. Regeneration of NiO / USY adsorbent using Pseudomonas delbrueckii R-8 and Klebsiella strain LSSE-H2

[0029] 1) Culture of logarithmic growth phase cells of Pseudomonas delbrueckii R-8

[0030] Pick the Pseudomonas delbrueckii R-8 strain cultured on the vegetative slant, add it to a medium with a volume of 25 ml, and cultivate it for 2 days at 30°C and 170r / min, and then culture the Pseudomonas delbrueckii Inoculate the R-8 strain of Pseudomonas delbrueckii into a 500ml Erlenmeyer flask containing 150ml of the above-mentioned medium, culture it on a shaker until the logarithmic growth phase, and centrifuge at 5000rpm for 6min to obtain Pseudomonas delbrueckii R-8 cells; wash it with physiological saline 2 to 3 times, the obtained Pseudomonas delbrueckii R-8 cells were suspended in normal saline, and placed in a refrigerator at 4°C;

[0031] The composition of the medium is as follows: KH 2 PO 4 2.44g, Na 2 HPO 4 12H 2 O 12.03g, MgCl 2 ·6H 2 O 0.4g, NH ...

Embodiment 2

[0041] Example 2, Magnetic polyvinyl alcohol immobilization of mixed cells of Pseudomonas delbrueckii R-8 and Klebsiella strain LSSE-H2 to regenerate Ag / Al 2 o 3 Adsorbent

[0042] 1) Cultivate logarithmic growth phase cells of the desulfurization strain Pseudomonas delbrueckii R-8

[0043] Method is the same as step 1) in the embodiment.

[0044] 2) Cultivate the logarithmic growth phase cells of the denitrification strain Klebsiella strain LSSE-H2. The cultivation method is the same as step 2) in the embodiment.

[0045] 3) Magnetic polyvinyl alcohol immobilization of mixed cells

[0046] Heat polyvinyl alcohol (PVA) and sodium alginate to dissolve in water, cool; mix desulfurization and denitrification microbial cells, magnetic fluid and the above solution evenly, so that the final concentrations of PVA and sodium alginate are 7.5% to 15%, respectively, 0.4% ~ 1.0%; drop the above mixed solution with a needle tube containing 1.0% ~ 5.0% CaCl 2 H 3 BO 3 In a saturated...

Embodiment 3

[0053] Embodiment 3, use Rhodococcus erythropolis LSSE8-1 and Klebsiella bacterial strain LSSE-H2 to regenerate Co-Y adsorbent

[0054] The Co-Y adsorbent adsorbed with sulfide and nitrogen was desorbed by using the specific biological desulfurization and denitrification catalyst Rhodococcus erythropolis LSSE8-1 and Klebsiella strain LSSE-H2 mixed cells for desorption, microbial cells in water The concentration in the phase is 30g / L and 16g / L, the water phase is physiological saline, and toluene is added as the oil phase at the same time, the volume ratio of the oil phase to the water phase is 0.25, and the ratio of the saturated adsorbed Co-Y adsorbent to the water phase is 10g / L L. Within 36 hours, 92% is converted into hydroxybiphenyl compounds, nitrogen compounds are completely converted, the adsorbent is filtered out, dried at 120°C, and roasted at 500°C to obtain a regenerated desulfurization adsorbent.

[0055] Among them, the Co-Y adsorbent adopts the existing technol...

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Abstract

The present invention relates to a regeneration method of desulfurizing denitrifying adsorbent. Said method includes the following steps: adding the adsorbent adsorbed organic sulfide and organic nitride into a mixed system formed from water phase and oil phase containing desulfurizing and denitrifying microbial cellulae, making regeneration reaction at 30deg.C, filtering, drying and roasting so as to obtain the regenerated adsorbent.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to a method for regenerating a desulfurization and denitrification adsorbent by utilizing microbial technology. Background technique [0002] The main elements of petroleum are carbon and hydrogen, and the content of other trace elements sulfur, nitrogen, oxygen and trace metal elements is 1-4%. Simple organic sulfur-containing and nitrogen-containing compounds can be removed by chemical methods such as hydrofining, while compounds with complex structures such as dibenzothiophene (DBT) compounds and carbazole compounds are difficult to remove. The existence of sulfur-containing and nitrogen-containing compounds will affect the quality and stability of oil products; at the same time, the combustion of sulfides and nitrogen compounds in oil products will generate sulfur oxides and nitrogen oxides, which will form acid rain and cause environmental pollution. Sulfur and nitroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01D53/04
Inventor 刘会洲李望良邢建民黄杰勋李玉光熊小超
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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