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IJSTR >> Volume 8 - Issue 1, January 2019 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Purification Of Synthetic Gas From Undeground Coal Gasification By Absorption

[Full Text]



Hardyanty Dwi Pratiwi, Muhammad Faizal, David Bahrin



UCG Gasification, Syngas, Absorbtion, K2CO3, Purification



An Underground Coal Gasification (UCG) Experiment has been modified in a laboratory scale conducted to produce of synthesis gas and to purify of synthetic gas. Synthetic Gas produced from modified UCG reactor composed of hydrogen gas (H2), carbonmonoxide (CO), methane (CH4), are the main gas, mixed with carbondioxide gas (CO2), Nitrogen gas (N2), hydrogen sulfide (H2S) and other gases. All three of hydrogen gas (H2), carbon monoxide (CO), methane (CH4) are combustible gas as a fuel. While non fuel gas containing CO2 is that high enough as one of the undesirable gas. CO2 gas content can reduce heating value from syngas, so do gas absorption CO2 process in syngas using K2CO3 solution with 4 N with concentration 0.5 Litres volume by using column bubble (bubble coulum). Variables used are syngas flow rate by total of air plus oxygen from 5 litre per minute to 15 litre per minute and absorption time 10 to 30 minutes with range 10 minutes. The occur mechanisms is process CO2 absorption by K2CO3 solution and with reaction between the two compounds. The results experiment showed optimal conditions is syngas flowrate 15 litres per minute with total air input 5 litres/minute plus oxygen input 10 litres/minute in 20 minutes time absorption can absorb CO2 gas 25% with escalation gas CH4 content 40.6%mole, syngas caloric value 441.1 Btu/Scf with ratio fuel gas/non fuel gas 1.02.



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