Method for removal of sulfur-based gas

Patent metadata

Field	Value
Publication number	US-9833735-B2
Application number	US-201514983438-A
Country	US
Kind code	B2
Filing date	Dec 29, 2015
Priority date	Mar 24, 2015
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A method for removing sulfur-based gases from a gas stream comprises contacting a sulfur containing gas stream under dynamic flow conditions with granular activated carbon (GAC) to adsorb substantially all sulfur-containing gas from the gas stream. The granular activated carbon (GAC) can be derived from date palm pits.

First claim

We claim:

1. A method for removal of sulfur-based gas, comprising:
providing granular activated carbon (GAC) derived from date palm pits;
contacting a gas stream including a sulfur-based gas under dynamic flow conditions with the granular activated carbon (GAC) derived from date palm pits; and
adsorbing the sulfur-based gas from the gas stream by the granular activated carbon (GAC) derived from date palm pits.

2. The method for removal of sulfur-based gas according to claim 1 , wherein the granular activated carbon (GAC) derived from date palm pits is provided in a dynamic continuous flow column.

3. The method for removal of sulfur-based gas according to claim 2 , wherein the granular activated carbon (GAC) derived from date palm pits has a bed depth of 1 cm to 8 cm inside the column.

4. The method for removal of sulfur-based gas according to claim 1 , wherein the sulfur-based gas comprises at least one of hydrogen sulfide and sulfur dioxide.

5. The method for removal of sulfur-based gas according to claim 1 , wherein the granular activated carbon (GAC) derived from date palm pits has a BET surface area ranging from around 700 m 2 /g to around 900 m 2 /g.

6. The method for removal of sulfur-based gas according to claim 1 , wherein the granular activated carbon (GAC) derived from date palm pits has an average particle size of 1 mm.

7. A method of preparing granular activated carbon (GAC) derived from date palm pits, comprising:
providing date palm pit particles;
mixing the date palm pit particles with an acid solution to form soaked date palm pit particles;
heating the date palm pit particles;
transferring the date palm pit particles to a desiccator to form desiccated granular activated carbon;
washing the desiccated granular activated carbon with water until a pH of 7 is reached;
drying the desiccated granular activated carbon after washing; and
sieving the dried granular activated carbon to obtain granular activated carbon with a particle size of about 1 mm.

8. The method of preparing granular activated carbon (GAC) derived from date palm according to claim 7 , wherein the acid is phosphoric acid.

9. The method of preparing granular activated carbon (GAC) derived from date palm pits according to claim 7 , wherein the date palm pit particles are heated to a temperature of about 500° C.

10. Granular activated carbon obtained by the method of claim 7 .

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Vohra Muhammad Shariq
• Labaran Bashir Alhaji

Classifications

• B01D53/04

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

• B01J20/3078

  Thermal treatment, e.g. calcining or pyrolizing · CPC title

• B01J20/28004 Primary

  Sorbent size or size distribution, e.g. particle size · CPC title

• B01J20/20

  comprising free carbon; comprising carbon obtained by carbonising processes · CPC title

• B01D2253/102

  Carbon · CPC title