76845 20250319143307.0 doi 10.1021/acs.energyfuels.6b01579 sideral 97057 ART-2016-97057 eng Manyà, J. J. Universidad de Zaragoza (orcid)0000-0002-0118-3254 Effects of Pressure and the Addition of a Rejected Material from Municipal Waste Composting on the Pyrolysis of Two-Phase Olive Mill Waste 2016 Access copy available to the general public Unrestricted This work examines the effect of the absolute pressure (0.1 or 1.0 MPa) and the addition of a high-ash rejected material from municipal solid waste (MSW) composting (RC) on the slow pyrolysis of two-phase olive mill waste (OW). The experiments were conducted in a batch pyrolysis system using an initial mass of 750 g of feedstock. Three types of initial materials were tested: the OW alone, a mixture of OW and pure additives (5 wt % K2CO3 and 5 wt % CaO), and a mixture of OW and RC (10 wt %). For the OW without any additive, an increased pressure led to a market increase in the carbonization efficiency (i.e., fixed carbon yield). At atmospheric pressure, the addition of either additives (CaO + K2CO3) or RC led to important changes in the pyrolysis behavior as a result of the catalytic role of the alkali and alkaline earth metals (AAEMs). However, this catalytic effect, which is translated into an enhancement of the decomposition of both the hemicellulose and cellulose fractions, was not observed at 1.0 MPa. The potential stability of all of the produced biochars appeared to be very high, given the results obtained from both proximate and ultimate analyses. This high stability was confirmed by 13C and 1H solid-state nuclear magnetic resonance, which showed that the carbon contained in the biochars was composed mainly or entirely of highly condensed aromatic structures. However, the highest values of stable C (Edinburgh stability tool) and R50, x (recalcitrance index) were obtained for biochars produced from the OW + RC mixtures at any pressure. In summary, the addition of the rejected material from MSW composting appears to be a very cost-effective measure to obtain a potentially high-stable biochar, even at atmospheric pressure. info:eu-repo/grantAgreement/ES/DGA/GPT info:eu-repo/grantAgreement/ES/MINECO/ENE2013-47880-C3-1-R info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 3.091 2016 ENGINEERING, CHEMICAL 27 / 133 = 0.203 2016 Q1 T1 ENERGY & FUELS 33 / 89 = 0.371 2016 Q2 T2 1.258 2016 Energy Engineering and Power Technology 2016 Q1 Fuel Technology 2016 Q1 Chemical Engineering (miscellaneous) 2016 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Alvira, D. (orcid)0000-0002-5526-3962 Azuara, M. Universidad de Zaragoza (orcid)0000-0002-7114-3506 Bernin, D. Hedin, N. 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 30, 10 (2016), 8055-8064 Energy fuels Energy and Fuels 0887-0624 555013 http://zaguan.unizar.es/record/76845/files/texto_completo.pdf Postprint 33546 http://zaguan.unizar.es/record/76845/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:76845 articulos driver 2025-03-19-14:32:09 ARTICLE