Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7067487 | Bioresource Technology | 2018 | 4 Pages |
Abstract
This work introduces biodiesel production from wet spent coffee grounds (SCGs) with supercritical methanol without any pre-drying process. Supercritical methanol and subcritical water effectively produced biodiesel via in situ transesterification by inducing more porous SCG and enhancing the efficiency of lipid extraction and conversion. It was also found that space loading was one of the critical factors for biodiesel production. An optimal biodiesel yield of 10.17â¯wt% of dry SCG mass (86.33â¯w/w% of esterifiable lipids in SCG) was obtained at reaction conditions of 270â¯Â°C, 90â¯bars, methanol to wet SCG ratio 5:1, space loading 58.4â¯ml/g and reaction time 20â¯min. Direct use of wet SCG waste as feedstock for supercritical biodiesel production eliminates the conventional dying process and the need of catalyst and also reduces environmental problems caused by landfill accumulation.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Jeesung Son, Bora Kim, Jeongseok Park, Jeongwoo Yang, Jae W. Lee,