Effect of biodiesel-derived impurities (acetic acid, methanol and potassium hydroxide) on the aqueous phase reforming of glycerol

Remón, J. ; Ruiz, J. ; Oliva, M. (Universidad de Zaragoza) ; García, L. (Universidad de Zaragoza) ; Arauzo, J. (Universidad de Zaragoza)

Resumen: This work analyses the influence of three biodiesel-derived impurities (CH3OH, CH3COOH and KOH) on the aqueous phase reforming of glycerol at 220 °C and 44 bar using a Ni-La/Al2O3 catalyst. The experiments were planed according to a factorial 2k design and analysed by means of an analysis of variance (ANOVA) test to identify the effect of each impurity and all possible binary and ternary combinations. The presence of CH3OH decreased the glycerol conversion, while CH3COOH and KOH decreased and increased the gas production, respectively. Catalyst deactivation took place under acidic conditions due to the loss of part of the active phase of the catalyst through leaching. The gas phase was made up of H2, CO2, CO and CH4. KOH exerted the greatest influence on the gas composition, increasing H2 production due to the greater gas production and the lower H2 consumption in the hydrogenation reactions. The liquid phase was made up of aldehydes, monohydric and polyhydric alcohols, C3 and C4 ketones and esters. CH3OH increased the proportion of monohydric alcohols, while CH3COOH promoted dehydration reactions, leading to an increase in the relative amount of C3-ketones.

Idioma: Inglés

DOI: 10.1016/j.cej.2016.05.018

Año: 2016

Publicado en: Chemical Engineering Journal 299 (2016), 431-448
ISSN: 1385-8947

Factor impacto JCR: 6.216 (2016)

Categ. JCR: ENGINEERING, ENVIRONMENTAL rank: 3 / 49 = 0.061 (2016) - Q1 - T1
Categ. JCR: ENGINEERING, CHEMICAL rank: 6 / 135 = 0.044 (2016) - Q1 - T1

Factor impacto SCIMAGO: 1.758 - Chemical Engineering (miscellaneous) (Q1) - Industrial and Manufacturing Engineering (Q1) - Environmental Chemistry (Q1) - Chemistry (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/ENE2010-18985
Financiación: info:eu-repo/grantAgreement/ES/MINECO/ENE2013-41523-R

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Tecnologi. Medio Ambiente (Dpto. Ing.Quím.Tecnol.Med.Amb.)