| Title | Recovery of pyrolysis char from residual biomass in accordance with the principles of the circular economy |
|---|---|
| ID_Doc | 28846 |
| Authors | Villot, A; Pena, J; Gerente, C |
| Title | Recovery of pyrolysis char from residual biomass in accordance with the principles of the circular economy |
| Year | 2023 |
| Published | |
| Abstract | Millet and buckwheat husk are biomass residues from mills and are considered waste materials for which don't have identified alternative recovery currently. Pyrolysis can be an attractive option which is conducive to waste management - a key element of the circular economy. In view of this, chars were produced from millet and buckwheat husk through pyrolysis, followed by physical activation with either CO2 or steam. Then, chars or activated chars produced were implemented in order to compared their capacity to remove tar from syngas. The tests were carried out at 650 degrees C and the syngas was composed of H2, CH4, CO, CO2 and N2, with 40 g/Nm3 of ethylbenzene as tar surrogate. The results showed that biomasses with low ash content, but which contained particular species as K and Ca knowing to have a positive impact on the tar cracking, combined with high porosity performed better in syngas upgrading. The chars produced from buckwheat husk has both of this characteristic what allows them to be reactive to crack the tars. In this regard, steam activation appears to be a better option than CO2 activation since it was able to create higher porosity as well as micro and mesopore level, and mineral species such as K and Ca were preserved in the solid phase. The aim of this paper is to investigate the recovery of local agricultural residue for conversion into useful material and energy vectors in the context of the circular economy through the pyro-gasification of buckwheat and millet husk. |
| http://manuscript.elsevier.com/S0016236122026631/pdf/S0016236122026631.pdf |
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