Influence of sucrose addition and acid treatment of silica-supported Co-Ru catalysts for Fischer-Tropsch synthesis. (1st November 2018)

• Record Type: Journal Article
• Authors: Ribeiro, André T.S.; Bezerra, Victor V.L.; Bartolomeu, Rodrigo A.C.; Abreu, Cesar A.M.; Filho, Nelson M.L.; Silva, Antônio O.S.; Maranhão, Laísse C.A.; Merino, David; Sanz, Oihane; Montes, Mario; Machado, Giovanna; Almeida, Luciano C.
• Is Part Of: Fuel. Volume 231(2018)
• Page Start: 157
• Page End: 164
• Publication Date: 2018-11-01
• Subjects: Fischer-Tropsch synthesis -- Co-based catalysts -- Chelating compounds -- Acid treatment; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2018.05.064
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: Sucrose addition and acid treatment modified catalyst properties and performance. A synergistic effect was provided by sucrose addition and acid treatment. The longest treatments increased Co crystal size. Both modifications enhanced the catalyst activity and the C5+ selectivity. The 2 h treated catalysts showed higher C5+ selectivity than the other catalysts. Abstract: This article highlights the formulation and evaluation of Co-Ru catalysts on silica used in Fischer-Tropsch synthesis. An acid treatment of the support associated with the addition of sucrose as a chelating agent was employed. The six formulated catalytic systems were characterized (TG, XRD, N2 adsorption, H2 -TPR, H2 chemisorption) and evaluated in a fixed bed tubular reactor (H2 /CO:2:1, 2 MPa, space velocity 4.5 × 10 −2 LN.gcat −1 ·h −1 ) at five different temperatures (185 °C, 200 °C, 215 °C, 230 °C, 260 °C). The combination of both methods enhanced the cobalt dispersion, which is accompanied by an increase in C5+ hydrocarbon productivity. However, an optimum acid treatment is required to avoid large cobalt particle formation that leads to low CO conversion.