Bioethanol steam reforming over monoliths washcoated with RhPt/CeO2–SiO2: The use of residual biomass to stably produce syngas. (19th January 2021)

• Record Type: Journal Article
• Authors: Cifuentes, Bernay; Gómez, July; Sánchez, Néstor; Proaño, Laura; Bustamante, Felipe; Cobo, Martha
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 5(2021)
• Page Start: 4007
• Page End: 4018
• Publication Date: 2021-01-19
• Subjects: Bioethanol impurities -- Biorefineries -- Fuel processing unit -- Non-centrifugal sugarcane waste -- Structured catalysts; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.10.271
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Ethanol steam reforming of synthetic bioethanol (i.e., anhydrous ethanol plus water), as well as bioethanol obtained from glucose standards and sugarcane press-mud was evaluated on monoliths washcoated with RhPt/CeO2 –SiO2 . Tests with synthetic bioethanol indicated that the lower pressure drop favors higher ethanol conversion in the monoliths with respect to the powder samples. Also, two monoliths in series with 0.08 gcat /cm 3 improved H2 yield compared to just one monolith with 0.16 gcat /cm 3 . Similarly, a decrease in the amount of carrier gas contributes to diffusion limitations in the monoliths, reducing the H2 /CO ratio. Monoliths stability was also evaluated with "real" bioethanol samples (from glucose standards and sugarcane press-mud-SPM). In all cases, a syngas with >60% of H2 was produced. For SPM-bioethanol, 3.1 ± 0.2 mol H2 /mol EtOH were obtained without evidence of deactivation for 120 h, at a cost of 6.9 $/kgH2, becoming a promising way to develop a technology for sustainable energy production. Graphical abstract: Image 1 Highlights: Lower pressure drops in monolithic systems favor ethanol conversion during ESR. Carrier gas decreasing reduces the energy to heat inlet stream, but impacts H2 yield. RhPt/CeO2 –SiO2 monoliths ensure a syngas production with a high H2 content (~65%). The use of residual biomass to produce bioethanol decreases H2 production cost.