Effect of process conditions on the product distribution of Fischer-Tropsch synthesis over an industrial cobalt-based catalyst using a fixed-bed reactor

Mass transfer advantage of hierarchical structured cobalt‐based catalyst pellet for Fischer–Tropsch synthesis

“…Therefore, wax accumulation in catalyst pores was a critical reason for internal diffusion limitation, which was consistent with the general views in literatures. 7,43,44 Considering that the products of low-temperature cobalt-based FTS are mainly long-chain hydrocarbons which are prone to liquefy and condensate in catalyst pores, 3,43 it is necessary to study the approaches of inhibiting wax filling. From the pellet engineering design perspective, a higher surface to volume ratio, the introduction of macropores, higher porosity and properly hydrophilic modification of inner pore surface are all tend to reduce the wax filling degree.…”

“…), has drawn great attention due to the environmental and political considerations, the changes in world fossil energy reserves and the improvements to the FTS technology. [1][2][3] Fixed-bed reactors have been widely adopted in low-temperature cobalt-based FTS process, because of the easy separation of catalysts from heavy waxy products, easy to scale-up, low maintenance and low losses due to attrition. 2 Although the fixed-bed FTS technology has been commercially applied worldwide, the trade-off between diffusion length in one single pellet and the pressure drop on the bed length is still a substantial issue for current fixed-bed reactor study.…”

“…Fischer–Tropsch synthesis (FTS), playing an essential role in the production of liquid fuels and/or chemicals from non‐petroleum fossil fuels (coal, natural gas, biomass etc. ), has drawn great attention due to the environmental and political considerations, the changes in world fossil energy reserves and the improvements to the FTS technology 1–3 …”

Mass Transfer Advantage of Hierarchical Structured Cobalt-based Catalyst Pellet for Fischer-Tropsch Synthesis

“…Therefore, wax accumulation in catalyst pores was a critical reason for internal diffusion limitation, which was consistent with the general views in the literature 7,43,44 . Considering that the products of low-temperature cobaltbased FTS are mainly long-chain hydrocarbons which are prone to liquefy and condensate in the catalyst pores 3,43 , it is necessary to study the approaches to inhibiting wax filling. From the pellet engineering design perspective, a higher surface to volume ratio, the introduction of macropores, higher porosity and properly hydrophilic modification of inner pore surface are all tend to reduce the pore filling degree.…”

“…Fischer-Tropsch synthesis (FTS), playing an essential role in the production of liquid fuels and/or chemicals from non-petroleum fossil fuels (coal, natural gas, biomass etc. ), has drawn great attention due to the environmental and political considerations, the changes in world fossil energy reserves and the improvements to the FTS technology [1][2][3] . Fixed-bed reactors have been widely adopted in low-temperature cobalt-based FTS process, because of the easy separation of catalysts from heavy waxy products, easy to scale-up, low maintenance and low losses due to attrition 2 .…”