Renewable Fuel Production by in Situ Hydrotreatment of Spent Coffee Grounds

Abstract

Abstract-Renewable diesel production from bio-oils is more expensive in comparison to petroleum diesel, with the production of bio-oils from pyrolysis and liquefaction being significant contributors. The aim of this project is to assess the liquid yield obtainable by the in-situ hydrotreatment of spent coffee grounds through hydrotreatment. The spent coffee grounds are covered with a solvent and hydrotreated in a low or zero oxygen environment within a batch reactor loaded with catalyst. At certain conditions a significant increase in liquid product yield is observed, indicating that not only does hydrotreatment take place, but liquefaction forming bio-oils. These bio-oils are also then hydrotreated increasing the liquid yield obtained from the reactor.