Hydrogen sulfide adsorbent in biogas and biogas purification system using the same

Patent metadata

Field	Value
Publication number	US-11826719-B2
Application number	US-202016772155-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Jun 27, 2019
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

Disclosed is an adsorbent containing a metal oxide for adsorption of hydrogen sulfide in biogas, and a biogas purification system using the same.

First claim

What is claimed is:

1. An adsorbent for adsorption of hydrogen sulfide in a biogas, the adsorbent comprising a metal oxide, an additive, and a binder;
wherein the additive comprises any one substance selected from the group consisting of active carbon, boehmite, zeolite, alumina, and combinations thereof;
wherein the binder comprises any one substance selected from the group consisting of polyvinyl alcohol (PVA), methyl cellulose, carbohydrate, carboxylic methyl cellulose, and combinations thereof;
wherein when the metal oxide is ZnO, the content of the additive is 7.5 to 15 parts by weight with respect to 100 parts by weight of the adsorbent, and when the metal oxide is Fe 2 O 3 , the content of the additive is 10 to 20 parts by weight with respect to 100 parts by weight of the adsorbent, and when the metal oxide is CuO, the content of the additive is 20 to 90 parts by weight with respect to 100 parts by weight of the adsorbent, and when the adsorbent is a mixture of CoO and ZnO, or a mixture of CuO, ZnO, and Al 2 O 3 , the content of the metal oxide is 5 to 95 parts by weight with respect to 100 parts by weight of the adsorbent; and
wherein the adsorbent does not include SiO 2 .

2. The adsorbent as claimed in claim 1 , wherein the adsorbent has the shape of a pellet.

3. The absorbent as claimed in claim 1 , wherein the adsorbent has a H 2 S adsorption capacity from 25 mg H 2 S/g to 60 mg H 2 S/g.

Assignees

• Korea Inst Energy Res

Inventors

• Baek Il Hyun
• Nam Sung Chan

Classifications

• B01J20/08 Primary

  comprising aluminium oxide or hydroxide; comprising bauxite · CPC title

• B01D53/02

  by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} · CPC title

• B01D53/04

  with stationary adsorbents {(B01D53/025 takes precedence)} · CPC title

• B01D53/1425

  Regeneration of liquid absorbents · CPC title

• B01D53/1462

  Removing mixtures of hydrogen sulfide and carbon dioxide · CPC title