Dry reforming of biogas in a pilot unit: Scale-up of catalyst synthesis and green hydrogen production. (5th October 2022)

• Record Type: Journal Article
• Authors: Oliveira, Lígia Gomes; Machado, Bruna; Pereira de Souza, Luana; Gosch Corrêa, Gean Carlo; Polinarski, Marcos Antonio; Cavalcanti Trevisan, Sérgio Vitor; Borba, Carlos Eduardo; Brackmann, Rodrigo; Alves, Helton José
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 84(2022)
• Page Start: 35608
• Page End: 35625
• Publication Date: 2022-10-05
• Subjects: Renewable energy -- Alternative sources -- Bioenergy -- Biofuels -- Green hydrogen; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.08.141
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A pilot experimental unit was constructed to produce synthesis gas from the dry reforming (DR) of biogas, and its operation was monitored during reaction assays. A scale-up was performed on synthesizing a Ni granulated catalyst, supported on mesoporous silica. The catalyst activity was evaluated under processes of induced deactivation, followed by regeneration during a 90-h reaction. The reaction variables studied included the volumetric composition of the inlet gas flow to the reactor (40–70%CH4 and 60-30%CO2 ), metal content (5–20% by mass), and inlet gas flow rate (684–2844 L h −1 ). The catalyst with the metal content of 20% provided the best conversions (99%CH4 and 97%CO2 ). The experimental pilot unit is capable of producing 575 L h −1 of green H2 from biogas. The regeneration step effectively eliminated coke from the catalyst surface, resulting in the recovery of catalytic performance. Graphical abstract: Image 1 Highlights: The in-situ regeneration prolonged the useful life of the catalyst. Catalyst scale-up proves to be a viable option for green hydrogen production. The catalyst showed stability during the deactivation and activation test. This work proposes the use of biogas to obtain green H2 on a larger scale. The experimental pilot unit is capable of producing 575 L h −1 of green H2 .