DocumentCode :
1673574
Title :
Temperature program adsorption of hydrogen sulfide by NaOH-impregnated activated carbons for hot fuel gas purification
Author :
Sitthikhankaew, Russamee ; Predapitakkun, Somrudee ; Kiattikomol, Ratanawan ; Pumhiran, Sudhibhumi ; Assabumrungrat, Suttichai ; Laosiripojana, Navadol
Author_Institution :
CHE Center for Energy Technol. & Environ., King Mongkut´´s Univ. of Technol. Thonburi, Bangkok, Thailand
fYear :
2011
Firstpage :
384
Lastpage :
388
Abstract :
Natural gas, biogas and synthesis gas from coal gasification contain hydrogen sulfide (H2S) that is toxic and strong odorous for human. It is high corrosive for engine. Among various methods for H2S removal, the adsorption by activated carbon is known as an efficient process for low concentration H2S removal. Moreover, activated carbon is not only inexpensive but also produces from agricultural waste in Thailand. The objective of this work is for upgrading the commercial-grade activated carbon by sodium hydroxide (NaOH) impregnation and the combination of steam activation and NaOH impregnation. The aim of upgrading is to improve the performance of H2S removal from fuel gases. The commercial and NaOH-impregnated activated carbons were tested by the temperature program adsorption of H2S at 30°C and 550°C. The results showed that the adsorption capacities of the NaOH-impregnated activated carbons are significantly higher than the commercial activated carbon (in the range of 2-21 times higher depending on the temperature of adsorption). At high temperature of adsorption, the adsorption capacity of the NaOH-impregnated activated carbon was 30.10 mg of H2S per gram of activated carbon. It can be concluded that the upgraded activated carbons is applicable for hot fuel gas purification. The concentration of H2S comes out at the outlet gas after treatment by the upgraded materials was almost 0 ppmv, which is safe for utilizing in fuel cell system and power engine.
Keywords :
activated carbon; adsorption; biofuel; coal gasification; hydrogen compounds; oil refining; purification; sodium compounds; H2S; NaOH; Thailand; activated carbon; agricultural waste; biogas; coal gasification; hot fuel gas purification; hydrogen sulfide adsorption; hydrogen sulfide removal; natural gas; sodium hydroxide impregnation; steam activation; synthesis gas; Carbon; activated carbon; adsorption; gas purification; hydrogen sulfide; sodium hydroxide impregnation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Clean Energy and Technology (CET), 2011 IEEE First Conference on
Conference_Location :
Kuala Lumpur
Print_ISBN :
978-1-4577-1353-8
Type :
conf
DOI :
10.1109/CET.2011.6041502
Filename :
6041502
Link To Document :
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