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CATALYTIC CO-HYDROPYROLYSIS OF RICE HUSK AND COFFEE HUSK MIXTURE TOWARD THERMOCHEMICAL VALORISATION: OPERATIONAL CONDITIONS

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dc.creatorSERGUEI ALEJANDRO MARTIN
dc.date2026
dc.date.accessioned2026-09-25T15:36:40Z
dc.date.available2026-09-25T15:36:40Z
dc.date.issued2026
dc.description.abstractPYROLYSIS REPRESENTS A PROMISING ROUTE FOR THE VALORISATION OF LIGNOCELLULOSIC WASTE AND A POTENTIAL SUBSTITUTE FOR FOSSIL FUELS. THIS STUDY INVESTIGATED, THROUGH A FACTORIAL ANALYTICAL SCREENING APPROACH, THE CATALYTIC CO- HYDROPYROLYSIS OF RICE HUSK (RH) AND COFFEE HUSK (CH) USING A GALLIUM-MODIFIED NATURAL ZEOLITE CATALYST (GA5/H2NHZ) IN A PY-GC/MS SYSTEM. AS AN ANALYTICAL SCREENING STUDY, THE OBJECTIVE WAS TO IDENTIFY THE OPERATING CONDITIONS AND BIOMASS COMPOSITIONS THAT FAVOUR THE FORMATION OF VALUE-ADDED CONDENSABLE PRODUCTS. THE REPORTED PERCENTAGES REPRESENT RELATIVE SELECTIVITIES OF GC-DETECTABLE PRODUCTS. THE EFFECTS OF REACTION ATMOSPHERE (H2 AND HE), TEMPERATURES, HEATING RATES, AND BIOMASS MIXTURES ON PRODUCT COMPOSITION WERE EVALUATED. THE ATMOSPHERE WAS THE VARIABLE WITH THE GREATEST IMPACT. UNDER INERT CONDITIONS (HE), MAXIMUM APPARENT SELEC- TIVITIES OF 48.92% FOR ACIDS AND 28.82% FOR ALDEHYDES WERE OBTAINED, WHEREAS HYDROPYROLYSIS REACHED 37.02% FOR KETONES, 22.10% FOR ALIPHATIC HYDROCARBONS, 16.24% FOR FURANS, 13.45% FOR PHENOLS, AND 10.31% FOR AROMATIC HYDROCARBONS. CH SHOWED A GREATER TENDENCY TOWARD KETONE AND ALIPHATIC HYDROCARBON FORMATION, WHEREAS AROMATIC HYDROCARBONS WERE ENHANCED AT 3:1 RH:CH RATIO. CO-PYROLYSIS SHOWED VARIABLE SYNERGISTIC EFFECTS ON ALIPHATIC AND AROMATIC HYDROCARBONS IN THE PRESENCE OF A CATALYST, PROMOTING DEOXYGENATION AND CRACKING, REDUCING THE OXYGEN CONTENT IN THE PRODUCTS. THE USE OF ISOCONVERSIONAL METHODS (FWO, KAS, AND FR) ALLOWED ESTIMATION OF THE KINETIC TRIPLET (APPARENT ACTIVATION ENERGY, PRE-EXPONENTIAL FACTOR, AND REACTION MODEL); THERMODYNAMIC PARAMETERS WERE LIKEWISE CALCULATED. FINALLY, A REACTION PATHWAY SCHEME FOR LIGNOCELLULOSIC MATERIALS WAS PROPOSED. THESE RESULTS PROVIDE MECHANISTIC INSIGHTS INTO PRODUCT FORMATION TRENDS DURING CATALYTIC CO-HYDROPYROLYSIS AND SUPPORT THE POTENTIAL OF RH AND CH AS FEEDSTOCKS FOR FUTURE VALORISATION STUDIES.
dc.formatapplication/pdf
dc.identifier.doi10.1016/j.rineng.2026.112432
dc.identifier.issn2590-1230
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/14359
dc.language
dc.publisherResults in Engineering
dc.relation.uri10.1016/j.rineng.2026.112432
dc.rightsOPEN ACCESS
dc.subjectAgro-industrial waste
dc.subjectPlatform compounds
dc.subjectAnalytic pyrolysis
dc.subjectCatalytic hydropyrolysis
dc.subjectNatural zeolite
dc.titleCATALYTIC CO-HYDROPYROLYSIS OF RICE HUSK AND COFFEE HUSK MIXTURE TOWARD THERMOCHEMICAL VALORISATION: OPERATIONAL CONDITIONS
dc.typeARTÍCULO
dspace.entity.typePublication
oaire.fundingReferenceANID- AGENCIA NACIONAL DE INVESTIGACIÓN Y DESARROLLO (EX CONICYT)
oaire.fundingReferenceUBB- UNIVERSIDAD DEL BÍO-BÍO
oaire.fundingReferenceUBB- UNIVERSIDAD DEL BÍO-BÍO
oaire.licenseConditionCC BY-NC 4.0
ubb.EstadoPUBLICADA
ubb.SedeCONCEPCIÓN
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