Isothermal CO2 adsorption column

Patent metadata

Field	Value
Publication number	US-9616407-B2
Application number	US-201615281956-A
Country	US
Kind code	B2
Filing date	Sep 30, 2016
Priority date	Jan 29, 2014
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A new adsorbent CO 2 -ONE for removal of acidic gases such as carbon dioxide and hydrogen sulfide was developed from hydrothermal reaction of natural limestone with natural kaolin via sodium hydroxide. Several synthesis conditions were employed such as initial concentration of NaOH, weight ratio of limestone to kaolin, reaction temperature and pressure. The produced Ca—Na—SiO2—Al2O3 samples were characterized using XRD and EDS and showed that a mixture of Gehlenite Ca 2 Al(Al 1.22 Si 0.78 O 6.78 )OH 0.22 and Stilbite Na 5.76 Ca 4.96 (Al 15.68 Si 56.32 O 144 ) with percentage of 43 and 57 was successfully produced, respectively. Another produced sample showed the presence of Gehlenite Ca 2 Al(Al 1.22 Si 0.78 O 6.78 )OH 0.22 , Stilbite Na 5.76 Ca 4.96 (Al 15.68 Si 56.32 O 144 ) and Lawsonite CaAl 2 Si 2 O 7 OH 2 (H 2 O) with percentage of 4.1 and 7.4 and 88, respectively.

First claim

The invention claimed is:

1. An isothermal CO 2 adsorption column, comprising:
an gas adsorption column having:
a CO 2 inlet at a first end,
a gas outlet at a second end, and
an adsorption/desorption bed disposed inside the column,

wherein the adsorption/desorption bed comprises a Ca—Na—SiO 2 —Al 2 O 3 /Sodium-Calcium-Aluminosilicate composition comprising:
40-45% gehlenite and 55-60% stilbite.

2. The isothermal CO 2 adsorption column of claim 1 , wherein the adsorption/desorption bed further comprises one or more acidic gases adsorbed on the Ca—Na—SiO 2 —Al 2 O 3 /Sodium-Calcium-Aluminosilicate composition.

3. The isothermal CO 2 adsorption column of claim 1 , wherein the Ca—Na—SiO 2 —Al 2 O 3 /Sodium-Calcium-Aluminosilicate composition comprises 42-44% gehlenite and 56-58% stilbite.

4. The isothermal CO 2 adsorption column of claim 1 , wherein the Ca—Na—SiO 2 —Al 2 O 3 /Sodium-Calcium-Aluminosilicate composition comprises 43% gehlenite and 57% stilbite.

5. The isothermal CO 2 adsorption column of claim 1 , having an acidic gas adsorption capacity of 0.10 mol/g-0.2 mol/g after a 1 st regeneration cycle.

6. The isothermal CO 2 adsorption column of claim 1 , having an acidic gas adsorption capacity of 2.0 mol/g-2.5 mol/g after a 5 th regeneration cycle.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Shawabkeh Reyad Awwad
• Faqir Naim Moh'D
• Bkour Qusay Yousef

Classifications

• B01D2253/1124

  Metal oxides · CPC title

• B01D2251/304

  of sodium · CPC title

• B01D2251/404

  of calcium · CPC title

• B01D53/04

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

• B01J20/16 Primary

  Alumino-silicates (B01J20/12 takes precedence) · CPC title