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Influence of sucrose addition and acid treatment of silica-supported Co-Ru catalysts for Fischer-Tropsch synthesis

2018; Elsevier BV; Volume: 231; Linguagem: Inglês

10.1016/j.fuel.2018.05.064

1873-7153

André T.S. Ribeiro, Victor Vital Leão Bezerra, Rodrigo A.C. Bartolomeu, César Augusto Moraes de Abreu, Nelson M. Lima Filho, Antônio Osimar Sousa da Silva, Laísse C. A. Maranhão, David Merino, Oihane Sánz, Mario Montes, Giovanna Machado, Luciano C. Almeida,

Catalytic Processes in Materials Science

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.