Gasification of spent coffee grounds in a semi-fluidized bed reactor using steam and CO2 gasification medium
| Autor: | Yu-Lin Kuo, Ting-Yu Ke, Henok Atile Kibret, Yao-Hsuan Tseng |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Fixed carbon
Elemental composition Municipal solid waste General Chemical Engineering Thermal decomposition chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Pulp and paper industry 01 natural sciences 0104 chemical sciences Coffee grounds chemistry Fluidized bed Environmental science Heat of combustion 0210 nano-technology Carbon |
| Zdroj: | Journal of the Taiwan Institute of Chemical Engineers. 119:115-127 |
| ISSN: | 1876-1070 |
| DOI: | 10.1016/j.jtice.2021.01.029 |
| Popis: | Coffee is the second popular drink and second traded item in the world. Unfortunately, the process of coffee beverage preparation generates a huge solid waste, which is about 650 kg/ton or 2 kg wet spent coffee grounds (SCG) per 1 kg of soluble coffee. The high carbon content, high heating value, low ash, and negligible sulfur content of SCG makes it an alternative fuel source through thermochemical conversion. Therefore, this study investigated the thermochemical conversion of SCG with or without the presence of CO2 and/or steam gasification medium in the semi-fluidized bed reactor. Elemental composition, calorific value, proximate analysis, and thermal decomposition characteristics were analysed. Surface morphology of SCG was also carried by field emission scanning electron microscopy. The chemical characterization has shown about 50% C and more than 7% H2 content, nearly 23% HHV, and about 70% VOC, and 20% fixed carbon. The gasification process in the presence of CO2 and steam atmosphere also showed about 95% carbon conversion and nearly 72% cold gas efficiency. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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