title: Energy recovery from waste glycerol by utilizing thermal water vapor plasma.
abstract: Glycerol, considered as a waste feedstock resulting from biodiesel production, has received much attention in recent years due to its properties, which offer to recover energy. The aim of this study was to investigate the use of a thermal water vapor plasma for waste (crude) glycerol conversion to synthesis gas, or syngas (H2+ CO). In parallel of crude glycerol, a pure glycerol (99.5%) was used as a reference material in order to compare the concentrations of the formed product gas. A direct current (DC) arc plasma torch stabilized by a mixture of argon/water vapor was utilized for the effective glycerol conversion to hydrogen-rich synthesis gas. It was found that after waste glycerol treatment, the main reaction products were gases with corresponding concentrations of H250.7%, CO 23.53%, CO211.45%, and CH43.82%, and traces of C2H2and C2H6, which concentrations were below 0.5%. The comparable concentrations of the formed gas products were obtained after pure glycerol conversion-H246.4%, CO 26.25%, CO211.3%, and CH44.7%. The use of thermal water vapor plasma producing synthesis gas is an effective method to recover energy from both crude and pure glycerol. The performance of the glycerol conversion system was defined in terms of the produced gas yield, the carbon conversion efficiency, the cold gas efficiency, and the specific energy requirements.
authors.affiliation: Plasma Processing Laboratory, Lithuanian Energy Institute, Breslaujos str. 3, -44403, Kaunas, LT, Lithuania. Andrius.Tamosiunas@lei.lt.
authors.forename: Andrius
authors.initials: A
authors.lastname: Tamošiūnas
authors.affiliation: Plasma Processing Laboratory, Lithuanian Energy Institute, Breslaujos str. 3, -44403, Kaunas, LT, Lithuania.
authors.forename: Pranas
authors.initials: P
authors.lastname: Valatkevičius
authors.affiliation: Plasma Processing Laboratory, Lithuanian Energy Institute, Breslaujos str. 3, -44403, Kaunas, LT, Lithuania.
authors.forename: Dovilė
authors.initials: D
authors.lastname: Gimžauskaitė
authors.affiliation: Université de Haute-Alsace, Institut de Sciences des Matériaux de Mulhouse, 15 rue Jean Starcky, 68057, Mulhouse cedex, France.
authors.forename: Mejdi
authors.initials: M
authors.lastname: Jeguirim
authors.affiliation: Plasma Processing Laboratory, Lithuanian Energy Institute, Breslaujos str. 3, -44403, Kaunas, LT, Lithuania.
authors.forename: Vladas
authors.initials: V
authors.lastname: Mėčius
authors.affiliation: Plasma Processing Laboratory, Lithuanian Energy Institute, Breslaujos str. 3, -44403, Kaunas, LT, Lithuania.
authors.forename: Mindaugas
authors.initials: M
authors.lastname: Aikas
mesh_terms: D056804:Biofuels; D005740:Gases; D005990:Glycerol; D058626:Plasma Gases; D013227:Steam
chemical_list: D056804:Biofuels; D005740:Gases; D058626:Plasma Gases; D013227:Steam; D005990:Glycerol
keywords: Energy; Glycerol; Synthesis gas; Thermal plasma; Waste; Water vapor