Relationship between Odor Adsorption Ability and Physical–Hydraulic Properties of Torrefied Biomass: Initial Study

Łukasz Sobol, Jacek Łyczko, Arkadiusz Dyjakon () and Ryszard Sroczyński
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Łukasz Sobol: Department of Applied Bioeconomy, Wroclaw University of Environmental and Life Sciences, Chełmońskiego St. 37a, 51-630 Wroclaw, Poland
Jacek Łyczko: Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, Norwida 25, 53-375 Wrocław, Poland
Arkadiusz Dyjakon: Department of Applied Bioeconomy, Wroclaw University of Environmental and Life Sciences, Chełmońskiego St. 37a, 51-630 Wroclaw, Poland
Ryszard Sroczyński: Faculty of Environmental Science and Technology, Wroclaw University of Environmental and Life Sciences, 50-363 Wroclaw, Poland

Energies, 2023, vol. 16, issue 4, 1-18

Abstract: Various techniques are implemented to reduce odor emission due to their potential multi-source nature. One modern approach is the use of thermochemically processed biomass to eliminate odors. Compared with raw biomass, processed biomass is characterized by greater porosity and an expanded specific surface. In these laboratory experiments, adsorption tests for a mixture of indole, 2,3-dimethylpyrazine, and 2,3,5-trimethylpyrazine are carried out using torreficates produced from biomass from the agri-food industry (walnut shells, orange peels, peach stones, and apple wood chips). This research is focused on the determination of the correlation between the physical-hydraulic properties of the torreficates and their ability to reduce the odors simulated by the selected compounds. The results indicate that 2,3-dimethylpyrazine and 2,3,5-trimethylpyrazine are not detected in any of the investigated low-temperature biochars. However, indole is detected in most materials, and its most significant quantities are adsorbed on torreficates made of orange peels (45.64 µg·mL ?1 ± 40.02 µg·mL ?1 ) and peach stones (61.26 µg·mL ?1 ± 49.55 µg·mL ?1 ). The performed analysis reveals that the highest correlation with the ability to adsorb indole is found for the average pore size (r = 0.66) and specific density (r = ?0.63) as well as the content of fixed carbon (r = 0.66), which may prove the importance of physical-hydraulic properties in odor sorption by low-temperature torreficates.

Keywords: biomass; torrefaction; indole; physical-hydraulic properties; odor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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