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 NASSINI; DANIELA ASENSIO; ROSA RODRÍGUEZ; GASTÓN FOUGA; GERMÁN MAZZA

Sanya

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

Society of Advanced Science and Engineering (SASE)

Given the need of valorizing the waste produced in theagroindustry in Patagonia to obtain products and energy, the present researchon the slow co-pyrolysis of Rosa rubiginosa fruit residues was carried out. To assess thepotential synergistic effects due to the mixing factor, different bends of huskwaste (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 separatelyas pure wastes. Slow pyrolysis of the five samples was performed on athermobalance and in a tubular reactor to study the evolution of decompositionand analyze the gaseous products (GC and FTIR), tar (GC-MS), and biochar(SEM-EDS). The RHW25 blendpresented a higher biochar yield and better quality since it contained a lowerconcentration of ash and a higher proportion of fixed carbon. It also showedthe best performance in the production of CO, CH3OH, and CH4 in contrast with the pyrolysisof the other samples. The pyrolysis of the RHW50 mixture was the one that reachedthe highest production of ethylene, while the pyrolysis of RHW75 was the one thatachieved the best H2 yield, being these products of special energeticinterest. Likewise, RHW75 was the mixture that reached the highestconcentration of diacetone alcohol and mesityl oxide produced. On the otherhand, the highest production of Oxacycloheptadec-10-ene-2-one and ButylatedHydroxytoluene (BHT) –both of cosmetic interest– were achieved by RHW100 andRHW0 respectively. Finally, multiple phenolic compounds were found in everyblend. Overall, the rosehip waste showed great potential as feedstock forthermochemical processes to obtain chemical products and energy, whilesynergistic effects were here demonstrated to select the best mixture dependingon the results and products desired