| Title |
Management of de-oiled coffee beans biomass through pyrolysis process: Towards a circular bioeconomy |
| ID_Doc |
21788 |
| Authors |
Silva, WR; Carregosa, JD; Almeida-Couto, JMF; Cardozo, L; Wisniewski, A |
| Title |
Management of de-oiled coffee beans biomass through pyrolysis process: Towards a circular bioeconomy |
| Year |
2022 |
| Published |
|
| DOI |
10.1016/j.jaap.2022.105763 |
| Abstract |
In this work, we proposed the pyrolysis process for the valorization of de-oiled defective coffee beans (DCB) residual biomass provided by the pressurized fluid extraction (PFE) process after the recovery of coffee oil. The proposal to subsequent thermoconversion of the de-oiled biomasses focuses in an integrated biorefinery concept to obtain value-added products, what fits into the circular bioeconomy strategy. DCB biomasses showed the highest coffee oil recovery yields (similar to 10%) from the PFE processes and presented yields of the pyrolysis condensate fraction (bio-oil + aqueous fraction) in the range between 53.7% and 59.4%. On the other hand, the yields of biochar and pyrolysis gas increased, with values from 23.6% to 27.3%, and from 17.0% to 19.5%, respectively, when compared to the yields from pyrolysis of the raw DCB. The biochars showed very similar compositions, with HHV between 24.7 and 25.3 MJ kg(-1). Overall, the bio-oils showed same constituents with variation in the concentrations of some species detected by GC/MS. Among them, the main classes with such alterations were phenolic compounds and carboxylic acids, in which the relative contents ranged from 19.7% to 39.0% and 11.3-46.1%, respectively. The findings demonstrated the potential of using pyrolysis as a sequential step to add value to the de-oiled DCB biomass remaining after the extraction of coffee oil, which could contribute to a sustainable circular economy with zero waste generation. |
| Author Keywords |
Waste biomass; Defective coffee beans; Circular economy; Pressurized fluid extraction; Bio-oil; Biochar |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000882197600002 |
| WoS Category |
Chemistry, Analytical; Energy & Fuels; Engineering, Chemical |
| Research Area |
Chemistry; Energy & Fuels; Engineering |
| PDF |
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