Drop Tube Reactor에서 석탄슬러리 가스화 특성

김용전; 이종민; 이재구; 김재호; 김정래; 김상돈

HWAHAK KONGHAK, Vol.35, No.5, 799-804, October, 1997

Export Citation

Drop Tube Reactor에서 석탄슬러리 가스화 특성

Gasification Characteristics of Coal-Slurry in a Drop Tube Reactor

김용전, 이종민, 이재구, 김재호, 김정래, 김상돈

초록

Drop tube reactor(0.05m-I.D*1m-high)에서 석탄슬러리 가스화반응특성을 파악하고자 반응온도(1,200-1,500℃), 산소/석탄비(0.3-1.5), 슬러리 농도(50, 55, 58wt.%), 탄종에 따른 영향을 실험하였다. 반응온도가 증가함에 따라, H₂와 CO의 조성은 증가하나 CO₂는 감소하였다. 산소/석탄비가 증가함에 따라 탄소전환율, 황전환율, 생성가스 수율, CO2의 농도는 증가하고 CO와 H₂의 수율은 산소/석탄비가 0.6일 때 최대값을 보였다. 슬러리 농도의 증가는 탄소전환율, 황전환율, 생성가스 수율을 증가시키나 H₂/CO의 비는 감소시켰다. 고등급탄의 경우, 동일한 석탄가스화 전환율을 얻기 위해서는 더 긴 체류시간이 필요하였다.

The effects of reaction temperature(1,200-1,500℃), oxygen/coal ratio(0.3-1.5), slurry concentration(50, 55, 58wt%), and coal type on gasification characteristics of coal-slurry in a drop tube reactor(0.05m-I.D.×1m-high) have been determined. The contents of H₂ and CO increase whereas, CO₂ decrease with increasing reaction temperature. Carbon conversion, sulfur conversion, product gas yield and concentrations of CO₂ increase with increasing O₂/coal ratio whereas, the product gas yield of H₂ and CO exhibit the maximum values at O₂/coal=0.6. With increasing slurry concentration, carbon conversion, sulfur conversion, total product gas yield increase, but the molar ratio of H₂/CO decrease. The longer residence time is required to gasify the higher rank coals.

Keywords:Coal-slurry;Gasification;Drop Tube Reactor

[References]

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Kwon TW, Kim SD, Fung DPC, Fuel, 67, 530 (1988)
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Song BH, Kim SD, Fuel, 72, 797 (1993)
Lee WJ, Kim SD, Fuel, 74, 1387 (1995)
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Flaxman RJ, Hallett WLH, Fuel, 66, 607 (1987)
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Azuhata S, Hedman PO, Smoot LD, Fuel, 65, 212 (1986)
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Lee JG, Ph.D. Dissertation, KAIST, Korea (1997)
Tsai CY, Scaroni AW, Fuel, 66, 1400 (1987)

[1] Takematsu T, Maude C, "Coal Gasification for IGCC Power Generation," IEACR/37, IEA Coal REsearch, London (1991)

[2] Wen CY, Chaung TZ, Ind. Eng. Chem. Process Des. Dev., 18, 684 (1979)

[3] Kwon TW, Kim SD, Fung DPC, Fuel, 67, 530 (1988)

[4] Kwon TW, Kim JR, Kim SD, Park WH, Fuel, 68, 416 (1988)

[5] Song BH, Kim SD, Fuel, 72, 797 (1993)

[6] Lee WJ, Kim SD, Fuel, 74, 1387 (1995)

[7] Lee JM, Kim YJ, Lee WJ, Kim SD, HWAHAK KONGHAK, 35(1), 121 (1997)

[8] Brown BW, Smoot LD, Hedman PO, Fuel, 65, 673 (1986)

[9] Flaxman RJ, Hallett WLH, Fuel, 66, 607 (1987)

[10] Lee JG, Kim JH, Lee HJ, Park TJ, Kim SD, Fuel, 75, 1035 (1996)

[11] Badzioch S, Hawksley GW, Ind. Eng. Chem. Process Des. Dev., 9, 521 (1970)

[12] Scaroni AW, Walker PL, Essenhigh RH, Fuel, 60, 71 (1981)

[13] Artos V, Scaroni AW, Fuel, 72, 927 (1993)

[14] Saito M, Sato M, Sadakata M, Fuel, 70, 709 (1991)

[15] Abi Ei-Samed AK, Hampartsoumian E, Farag TM, Williams A, Fuel, 69, 1029 (1990)

[16] Shu-Cai G, Hedden K, Bd. 35, Hett 7,329 (1982)

[17] Nsakala NY, Patel RL, Lao TC, "Combustion and Gasfication Characteristics of Chars from Four Commercially Significant Coal of Different Rank," CE Research Project AP-2601, Final Report for EPRI (1982)

[18] Azuhata S, Hedman PO, Smoot LD, Fuel, 65, 212 (1986)

[19] Cornils B, Hibbel J, Ruprecht P, Durrfeld R, Langhoff J, Hydrocarb. Process., 149 (1981)

[20] Lee JG, Ph.D. Dissertation, KAIST, Korea (1997)

[21] Tsai CY, Scaroni AW, Fuel, 66, 1400 (1987)