Document Detail


Novel Two-in-One Fuel Combining Sugar Cane with Low Rank Coal and Its CO(2) Reduction Effects in Pulverized-Coal Power Plants.
MedLine Citation:
PMID:  23286316     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Coal-fired power plants are facing to two major independent problems, namely, the burden to reduce CO(2) emission to comply with Renewable Portfolio Standard (RPS) and cap-and-trade system, and the need to use low-rank coal due to the instability of high-rank coal supply. To address such unresolved issues, integrated gasification combined cycle (IGCC) with carbon capture and storage (CCS) has been suggested, and low rank coal has been upgraded by high-pressure and high-temperature processes. However, IGCC incurs huge construction costs, and the coal upgrading processes require fossil-fuel-derived additives and harsh operation condition. Here we first show a hybrid coal that can solve these two problems simultaneously while using existing power plants. Hybrid coal is defined as a two-in-one fuel combining low rank coal with a sugar-cane-derived bioliquid, such as molasses and sugar cane juice, by bioliquid diffusion into coal intra-pores and pre-carbonization of the bioliquid. Unlike the simple blend of biomass and coal showing dual combustion behavior, hybrid coal provided a single coal combustion pattern. If hybrid coal (biomass/coal ratio = 28 wt%) is used as a fuel for 500 MW power generation, the net CO(2) emission is 21.2 - 33.1 % and 12.5 - 25.7 % lower than those for low rank coal and designed coal, and the required coal supply can be reduced by 33 % compared with low rank coal. Considering high oil prices and time required before a stable renewable energy supply can be established, hybrid coal could be recognized as an innovative low-carbon-emission energy technology that can bridge the gulf between fossil fuels and renewable energy, because various water-soluble biomass could be used as an additive for hybrid coal through proper modification of preparation conditions.
Authors:
Dong-Wook Lee; Jong-Soo Bae; Young-Joo Lee; Se-Joon Park; Jai-Chang Hong; Byoung-Hwa Lee; Chung-Hwan Jeon; Young-Chan Choi
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-3
Journal Detail:
Title:  Environmental science & technology     Volume:  -     ISSN:  1520-5851     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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