Articles & Issues
- Language
- English
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
-
Received March 23, 2001
Accepted May 26, 2001
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.
All issues
Steam Gasification of Coal with Salt Mixture of Potassium and Nickel in a Fluidized Bed Reactor
Energy/Coal and Chemical Process Research Team, Research Institute of Industrial Science and Technology, Pohang 790-330, Korea 1Department of Chemical Engineering and Energy & Environment Research Center, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea 2Department of Chemical Engineering, Kunsan National Univ., Kunsan 573-701, Korea
kimsd@cais.kaist.ac.kr
Korean Journal of Chemical Engineering, September 2001, 18(5), 640-645(6), 10.1007/BF02706380
Download PDF
Abstract
Australian coal loaded with a mixed catalyst of K2SO4+Ni(NO3)2 has been gasified with steam in a fluidized bed reactor of 0.1 m inside diameter at atmospheric pressure. The effects of gas velocity (2-5 U(g)/U(mf)), reaction temperature (750-900 ℃), air/coal ratio (1.6-3.2), and steam/coal ratio (0.63-1.26) on gas compositions, gas yield and gas calorific value of the product gas and carbon conversion have been determined. The product gas quality and carbon conversion can be greatly improved by applying the catalyst; they can also be enhanced by increasing gas velocity and temperature. Up to 31% of the catalytic increment in gas calorific value could be obtained at higher temperatures. In the experimental runs with variation of steam/coal ratio, the catalytic increments were 16-38% in gas calorific value, 14-57% in carbon conversion, 5-46% in gas yield, and 7-44% in cold gas efficiency. With increasing fluidization gas velocity and reaction temperature, the unburned carbon fraction of cyclone fine for catalytic gasification decreased 4-18% and 13-16%, respectively, compared to that for non-catalytic gasification.
References
Choi KH, Lee WY, Rhee HK, Moon SH, Lee HI, Korean J. Chem. Eng., 10(2), 78 (1993)
Dhirendra MV, Awasthi SK, Pandey GN, Energy, 11, 563 (1986)
Foong SK, Cheng G, Watkinson AP, Can. J. Chem. Eng., 59, 625 (1981)
Gutierrez LA, Watkinson AP, Fuel, 61, 133 (1982)
Kikuchi K, Suzuki A, Mochizuki T, Endo S, Imai E, Tanji Y, Fuel, 64, 368 (1985)
Kim JJ, Park MH, Kim C, Korean J. Chem. Eng., 18(1), 94 (2001)
Lee WJ, Kim SD, Fuel, 74, 1387 (1995)
Nahas NC, Fuel, 62, 1564 (1983)
Riley RK, Judd MR, Chem. Eng. Commun., 62, 151 (1987)
Saffer MOA, Ferrell JK, Int. Chem. Eng., 28, 46 (1988)
Song BH, Kim SD, Fuel, 72(6), 797 (1993)
Sue-A-Quan TA, Watkinson AP, Gaikward RP, Ferris BR, Fuel Process. Technol., 27, 67 (1991)
Tomita A, Watanabe Y, Takarada T, Ohtsuka Y, Tamai Y, Fuel, 64, 795 (1985)
Watkinson AP, Cheng G, Lim CJ, Can. J. Chem. Eng., 65, 791 (1987)
Wathinson AP, Cheng G, Prakash CB, Can. J. Chem. Eng., 61, 468 (1983)
Dhirendra MV, Awasthi SK, Pandey GN, Energy, 11, 563 (1986)
Foong SK, Cheng G, Watkinson AP, Can. J. Chem. Eng., 59, 625 (1981)
Gutierrez LA, Watkinson AP, Fuel, 61, 133 (1982)
Kikuchi K, Suzuki A, Mochizuki T, Endo S, Imai E, Tanji Y, Fuel, 64, 368 (1985)
Kim JJ, Park MH, Kim C, Korean J. Chem. Eng., 18(1), 94 (2001)
Lee WJ, Kim SD, Fuel, 74, 1387 (1995)
Nahas NC, Fuel, 62, 1564 (1983)
Riley RK, Judd MR, Chem. Eng. Commun., 62, 151 (1987)
Saffer MOA, Ferrell JK, Int. Chem. Eng., 28, 46 (1988)
Song BH, Kim SD, Fuel, 72(6), 797 (1993)
Sue-A-Quan TA, Watkinson AP, Gaikward RP, Ferris BR, Fuel Process. Technol., 27, 67 (1991)
Tomita A, Watanabe Y, Takarada T, Ohtsuka Y, Tamai Y, Fuel, 64, 795 (1985)
Watkinson AP, Cheng G, Lim CJ, Can. J. Chem. Eng., 65, 791 (1987)
Wathinson AP, Cheng G, Prakash CB, Can. J. Chem. Eng., 61, 468 (1983)
