Sisal-derived acid-char molybdenum catalyst for reductive deoxygenation of sulfoxides

Fernandes, Tiago A.; Duarte, Tiago A.G.; Mestre, Ana S.; Ferreira, Maria J.G.; do Rego, Ana M. Botelho; Ferraria, Ana M.; Kirillova, Marina V.; Carvalho, Ana P.; Calhorda, Maria José

doi:10.1016/j.cattod.2023.114388

Cited by 2 publications

(1 citation statement)

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“…Arvizu-Rodríguez et al [14] produced Li-S batteries using biomass-derived carbon cathode, produced by the pyrolysis of Agave tequilana bagasse, and observed a specific capacity of ~1600 mA h g -1 , comparable to commercial batteries (1675 mA h g -1 ), with modest cycles stability and a capacity retention of 30% after 200 cycles. Fernandes et al [15] employed acidic biochar derived from the pyrolysis of sisal fibers as catalytic support and observed that this biochar provided the required pH for the reduction reactions of sulfoxides, and demonstrated simplicity in the catalyst's regeneration. Jambeiro et al [16] evaluated the potential of pyrolysis in bio-oil https://doi.org/10.26434/chemrxiv-2024-9jt28 ORCID: https://orcid.org/0000-0002-4231-1056 Content not peer-reviewed by ChemRxiv.…”

Section: Introductionmentioning

confidence: 99%

Exploring the pyrolysis of agave species as a novel bioenergy source: thermo-kinetics, modeling, and product composition insights

Gomes da Silva,

Arias,

Pacheco

et al. 2024

Preprint

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The agave plant’s economic chain generates a significant waste, which has potential for sustainable bioenergy through pyrolysis. However, the diversity and heterogeneity of chemical composition of agave species may pose challenges. This study investigates the impact of species heterogeneity on the pyrolysis of three different agave species (Agave sisalana, Agave tequilana, and Agave wercklei), aiming to correlate pyrolysis and biomass properties. Solid characterization and Py-GC/MS were used to understand agave physicochemical characteristics and organic group distribution in volatiles, respectively.A multi-step model and advanced numerical methods were employed for the kinetic study. The physicochemical characteristics showed similar values but a distinct distribution of inorganic compounds, predominantly composed of alkaline metals (6-11%w.b.), potentially influencing the organic groups’ distribution in the volatiles. High relative areas of aliphatic components (13-28% at 773K and 16-36% at 873K) and low quantity of acidic groups (<2%) could be attributed to the catalytic deoxygenation promoted by alkaline metals. These findings are significant for future application of agave in bio-oil production by pyrolysis, as commercial biomasses often yield a high content of oxygenated and acid groups. For the kinetic study, six decomposition profiles were identified in the pyrolysis, encompassing the decomposition of extractives, saponins, lignocellulose, and oxalate salts. The similarity in profiles resulted in approximately equivalent kinetic parameter values and mechanisms among the species. The average values of Ea ranged from 71-324 kJ mol-1, k0 values varied between 107-1022, and the reaction mechanisms included n-order and Avrami-Erofeyev types. The validity of the parameters was verified through curve reconstruction. The inorganic composition was chosen as the parameter related to pyrolysis characteristics, as it was the only parameter that differed significantly among the species. Based on the data, normalization and the proposed model demonstrated satisfactory values of R² (>0.9251), QOF (>94%), and MSE (<2.73×10-3). This underscores the model's potential to describe decomposition profiles solely based on knowledge of inorganic composition, regardless of agave species.

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Section: Introductionmentioning

confidence: 99%