Thermo-Catalytic Reforming of spent coffee grounds

Mohamed Elmously, Nils Jäger, Andreas Apfelbacher, Robert Daschner, Andreas Hornung

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)
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Conversion of spent coffee grounds through the Thermo-Catalytic Reforming system (TCR ®) is evaluated in this study. While, the TCR ® is a technology that has been developed by Fraunhofer UMSICHT, which combines an intermediate pyrolysis and a catalytic reforming. The temperature of the catalytic reformer is varied between 500 and 700 °C to achieve an optimum yield quantities and qualities of the products. The hydrogen concentration is maximized at a reforming temperature of 700 °C, and a gas yield up to 52 wt% is achieved. The thermal stable bio-oil produced at 700 °C has the highest calorific value of 36.8 MJ/kg with significantly low oxygen and water content, low viscosity and low TAN (total acid number). Furthermore, the maximum bio-oil and char yields are obtained at the lowest reforming temperature of 500 °C. Overall spent coffee grounds show a great potential as feedstock in the Thermo-Catalytic Reforming for energy and bio-chemicals production.[Figure not available: see fulltext.].

Original languageEnglish
Article number44
Number of pages12
JournalBioresources and Bioprocessing
Issue number1
Publication statusPublished - 21 Nov 2019


  • Intermediate pyrolysis
  • TCR ®
  • Spent coffee grounds
  • Catalytic reforming
  • Sustainable fuels


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