Synergistic effects of the mixing factor on the products obtained by co-pyrolysis of Rosa rubiginosa wastes from the agroindustry in Northern Patagonia

RODRIGO TORRES SCIANCALEPORE; DANIELA NASINI; DANIELA ASENSIO; ROSA RODRÍGUEZ; GASTÓN FOUGA; GERMÁN MAZZA

Sanya

Conferencia; 2023 International Conference on Chemical, Energy Science and Environmental Engineering (CESEE 2023); 2023

2023 International Conference on Chemical, Energy Science and Environmental Engineering

Given the need of valorizing the waste produced in the agroindustry in Patagonia to obtain products and energy, the present research on the slow co-pyrolysis of Rosa rubiginosa fruit residues was carried out. To assess the potential synergistic effects due to the mixing factor, different bends of husk waste (RHW) and seeds waste (RSW) were prepared in mass proportions of RHW 1:3 (RHW25), 1:1 (RHW50) and 3:1 (RHW75), in addition to their treatment separately as pure wastes. Slow pyrolysis of the five samples was performed on a thermobalance and in a tubular reactor to study the evolution of decomposition and analyze the gaseous products (GC and FTIR), tar (GC-MS), and biochar (SEM-EDS).The RHW25 blend presented a higher biochar yield and better quality since it contained a lower concentration of ash and a higher proportion of fixed carbon. It also showed the best performance in the production of CO, CH3OH, and CH4 in contrast with the pyrolysis of the other samples. The pyrolysis of the RHW50 mixture was the one that reached the highest production of ethylene, while the pyrolysis of RHW75 was the one that achieved the best H2 yield, being these products of special energetic interest. Likewise, RHW75 was the mixture that reached the highest concentration of diacetone alcohol and mesityl oxide produced. On the other hand, the highest production of Oxacycloheptadec-10-ene-2-one and Butylated Hydroxytoluene (BHT) –both of cosmetic interest– were achieved by RHW100 and RHW0 respectively. Finally, multiple phenolic compounds were found in every blend.Overall, the rosehip waste showed great potential as feedstock for thermochemical processes to obtain chemical products and energy, while synergistic effects were here demonstrated to select the best mixture depending on the results and products desired.