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A catalyst for removing hydrogen sulfide in biogas and its preparation and use method

A biogas and hydrogen sulfide technology, applied in the energy and environment fields, can solve the problems of increasing impurities, reducing the calorific value of biogas, lack of deep purification technology, etc., and achieving the effect of increasing the calorific value

Active Publication Date: 2019-07-26
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process needs to pass hydrogen sulfide and air or oxygen into the acidic iron-based ionic liquid, which will increase the impurities in the biogas and reduce the calorific value of the biogas, which will affect the subsequent resource utilization of biogas
[0013] At present, the utilization of biogas in my country is still in the initial stage, and there is a lack of deep purification technology, especially in the removal of hydrogen sulfide. New catalysts with reliable performance and higher efficiency are urgently sought to provide technical support for the deep utilization of biogas

Method used

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  • A catalyst for removing hydrogen sulfide in biogas and its preparation and use method
  • A catalyst for removing hydrogen sulfide in biogas and its preparation and use method
  • A catalyst for removing hydrogen sulfide in biogas and its preparation and use method

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Embodiment 1

[0044] In the embodiment of the present invention 1, the preparation method of catalyst comprises the following steps:

[0045] (1) Weigh 10 mmol of iron acetylacetonate and 30 mmol of elemental sulfur, put them into 500 mL of tetraethylene glycol dimethyl ether, add 0.25 mL of distilled water, mix well, and obtain a suspension; Ethylene glycol dimethyl ether was subjected to deoxygenation treatment, and argon gas was continuously bubbled into the solvent at 200 mL / min for 30 min.

[0046] (2) The obtained suspension was sonicated for 5 hours, the ultrasonic frequency was 20 kHz, the ultrasonic reaction temperature was 40 °C, the amplitude was 96 μm, and the pulse mode was adopted, the pulse start time was 3 seconds, and the pulse stop time was 1 second. Infuse 100 mL / min of humidified argon at room temperature, and isolate the air.

[0047] (3) After the sonication, add 100 ml of n-hexane, let it stand for 60 hours, wash and dry the obtained product by centrifugation, and th...

Embodiment 2

[0050] In the embodiment of the present invention 2, the preparation method of catalyst comprises the following steps:

[0051] (1) Weigh 6mmol of iron acetylacetonate and 20mmol of elemental sulfur, put them into 500mL of decalin, add 2.5mL of distilled water, mix well, and obtain a suspension; the decalin has been deoxygenated, Argon was continuously bubbled into the solvent at 250 mL / min for 30 min.

[0052] (2) The obtained suspension was sonicated for 20 h, the ultrasonic frequency was 20 kHz, the ultrasonic reaction temperature was 10 °C, the amplitude was 72 μm, and the pulse mode was adopted, the pulse start time was 4 seconds, and the pulse stop time was 1 second. Infuse 100 mL / min of humidified argon at room temperature, and isolate the air.

[0053] (3) After the sonication, add 100 ml of n-hexane, let it stand for 60 hours, wash the product by centrifugation, and dry it. The washing solvent is isopropanol to obtain a catalyst for hydrogen sulfide removal from biog...

Embodiment 3

[0056] In the embodiment of the present invention 3, the preparation method of catalyst comprises the following steps:

[0057] (1) Weigh 15 mmol of iron acetylacetonate and 50 mmol of elemental sulfur, put them into 500 mL of decalin, add 10 mL of distilled water, mix well, and obtain a suspension; wherein 100 mL / min continued to bubble argon into the solvent for 60 min.

[0058] (2) The obtained suspension was sonicated for 24 hours, the ultrasonic frequency was 20 kHz, the ultrasonic reaction temperature was 5 °C, the amplitude was 120 μm, and the pulse mode was adopted, the pulse start time was 6 seconds, and the pulse stop time was 3 seconds. Introduce 200mL / min humidified argon at room temperature, and isolate the air.

[0059] (3) After the sonication, add 200ml of n-hexane, let it stand for 120h, centrifuge wash and dry the obtained product, the washing solvent is ethanol, and obtain a catalyst for hydrogen sulfide removal from biogas.

[0060] In Example 3 of the pr...

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Abstract

The invention discloses a catalyst for removing hydrogen sulfide in biogas and preparation and usage method thereof. The preparation method of the catalyst comprises the following steps that ferric acetylacetonate and elemental sulfur are put in an ultrasonic chemical solvent, distilled water is added, n-hexane is added after ultrasonic processing, standing is performed, and the obtained product is subjected to centrifugal washing and drying. The usage method of the catalyst comprises the following steps that biogas passes through a filling column filled with the catalyst, the temperature of the filling column is controlled to be 200-650 DEG C, reaction pressure is 1.0-5.0atm, and the volume air speed of the biogas to the catalyst is 400-1800 h<-1>. The catalyst has the high hydrogen sulfide conversion rate without oxygen adding for the biogas, the heat value of the biogas can be improved, elemental sulfur is recycled, and the catalyst is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of energy and environment, and specifically relates to a catalyst for removing hydrogen sulfide in biogas and a preparation and use method thereof. Background technique [0002] The conversion of biomass to biogas is a way to obtain clean and renewable energy with great potential, which is beneficial to the environment, health, economy and energy conservation. The main components of biogas are methane and carbon dioxide, which can be used in various ways, such as heat and steam production, electricity / heat and power cogeneration, or as vehicle fuel. The components of biogas and natural gas are similar, and it has the potential to be used as pipeline quality natural gas, which can be injected into the urban natural gas pipeline system. [0003] In all utilization pathways, biogas must be freed of sulphides according to its further utilization purpose. Sulphides in biogas corrode internal combustion engines ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J35/02B01J37/04B01J37/34B01D53/86B01D53/52C10L3/10
CPCY02C20/20
Inventor 苏良湖张龙江张明珠韩志华陈玉东孙旭蔡金傍赵志强
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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