CHEMICAL CHARACTERIZATION OF HYBRID COAL FROM COAL-BIOMASS CO-PYROLYSIS PRODUCT
Supply of lignite coal and saw dust in Indonesia in 2016 reach 131,05 and 11,82 million tonnes, respectively. This amount is potentially used as feedstock for production of hybrid coal through co-pyrolysis. Hybrid coal which has better quality than its raw material will increase combustion efficie...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/32986 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Supply of lignite coal and saw dust in Indonesia in 2016 reach 131,05 and 11,82 million tonnes, respectively. This amount is potentially used as feedstock for production of hybrid coal through co-pyrolysis. Hybrid coal which has better quality than its raw material will increase combustion efficiency and reduce non-neutral CO2 emission. Hybrid coal contains aromatic hydrocarbon extractive compounds which has negative impact to human health. Extraction is a method to characterize aromatic hydrocarbon extractive compound on hybrid coal. The purposes of this research are to identify hydrocarbon extractive compound on hybrid coal through extraction, to study the effect of solvent, the effect of hybrid coal particle size and the effect of temperature on hydrocarbon extractive compound. This research covers co-pyrolysis and extraction process with solvent variation (acetone, toluene and DCM), hybrid coal size variation (coarse and fine) and extraction temperature variation (ambient and boiling point of solvent). Hybrid coal characterization includes proximate, ultimate, TGA, calorific value analysis and identification of hydrocarbon extractive compound using GCMS.
The result show that hybrid coal calorific value is 5282 kkal/kg which has increased 13,35% from calorific value of co-pyrolysis feed. Non-neutral CO2 emission has decreased 28,20%. From solvent variation, only toluene that able to identify hydrocarbon extractive compound. Toluen was able to identify 11 volatile compounds. Hybrid coal extraction in toluen boiling point temperature was able to identify more extractive compound than in room temperature. Extraction on co-pyrolysis feed and granul hybrid coal produced 8 and 7 volatile compounds. While extraction on co-pyrolysis feed and fine hybrid coal produced 12 compounds, respectively. Identification result show that hybrid coal give more negative impact to human health since 1,3-benzodioxin-4-one compound were found.
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