Preparation and Characterization of the Glycerol-Embedded Hybrid Coal
| Autor: | Jong Won Choi, Young Chan Choi, Se Joon Park, Young-Joo Lee, Dongwook Lee, Hueon Namkung, Kwang Ho Song, Joeng Geun Kim, Jong Soo Bae, Gyu Seob Song, Ju-Hyoung Park, Min Ho Jin |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
General Chemical Engineering Mixing (process engineering) Evaporation 02 engineering and technology 010402 general chemistry complex mixtures 01 natural sciences Catalysis chemistry.chemical_compound Glycerol Environmental Chemistry Coal Renewable Energy Sustainability and the Environment business.industry technology industry and agriculture Sulfuric acid General Chemistry 021001 nanoscience & nanotechnology Torrefaction 0104 chemical sciences chemistry Chemical engineering Heat of combustion 0210 nano-technology business |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 7:4637-4646 |
| ISSN: | 2168-0485 |
| Popis: | The molasses embedded hybrid coal (Hybrid Coal by Korea Institute of Energy Research; HCK) was previously proposed as an attractive alternative to low-rank coals that tend to show low calorific values and high CO2 emissions. HCK was synthesized by mixing molasses with a low-rank coal to enhance its heating value. Nevertheless, food ethics regarding molasses additives still have impeded its commercial acceptance. In this study, we propose a glycerol (nonfood)-based coal upgrading process to improve the combustion kinetics and heating value of hybrid coal in comparison to the previous HCK. The process involves drying at 105 °C followed by torrefaction process at 250 °C. During torrefaction, the glycerol additive starts to evaporate at about 180 °C and then is almost vaporized out to the coal surface. To avoid glycerol loss, we employ sulfuric acid as a torrefaction catalyst to suppress glycerol evaporation. In comparison to the molasses yield of 65% after torrefaction in the previous HCK synthesis process, ... |
| Databáze: | OpenAIRE |
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