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Characteristics of Coal Slurry Gasification under Partial Slagging Operating Condition
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  • Journal title : Korean Chemical Engineering Research
  • Volume 52, Issue 5,  2014, pp.657-666
  • Publisher : The Korean Institute of Chemical Engineers
  • DOI : 10.9713/kcer.2014.52.5.657
 Title & Authors
Characteristics of Coal Slurry Gasification under Partial Slagging Operating Condition
Lee, Jin Wook; Chung, Seok Woo; Lee, Seung Jong; Jung, Woohyun; Byun, Yong Soo; Hwang, Sang Yeon; Jeon, Dong Hwan; Ryu, Sang Oh; Lee, Ji Eun; Jeong, Ki Jin; Kim, Jin Ho; Yun, Yongseung;
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Coal gasification technology is considered as next generation clean coal technology even though it uses coal as fuel which releases huge amount of greenhouse gas because it has many advantages for carbon capture. Coal or pet-coke slurry gasification is very attractive technology at present and in the future because of its low construction cost and flexibility of slurry feeding system in spite of lower efficiency compared to dry feeding technology. In this study, we carried out gasification experiment using bituminous coal slurry sample by integrating coal slurry feeding facility and slurry burner into existing dry feeding compact gasifier. Especially, our experiment was conducted under fairly lower operation temperature than that of existing entrained-bed gasifier, resulting in partial slagging operation mode in which only part of ash was converted to slag and the rest of ash was released as fly ash. Carbon conversion rate was calculated from data analysis of collected slag and ash, and then cold gas efficiency, which is the most important indicator of gasifier performance, was estimated by carbon mass balance method. Fairly high performance considering pilot-scale experiment, 98.5% of carbon conversion and 60.4% of cold gas efficiency, was achieved. In addition, soundness of experimental result was verified from the comparison with chemical equilibrium composition and energy balance calculations.
Coal Slurry;Gasification;Partial Slagging;Compact Gasifier;Performance Analysis;
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