Potential pathways for syngas transformation towards kerosene range hydrocarbons in a dual Fischer‐Tropsch‐zeolite bed

Abstract

Summary The Fischer‐Tropsch synthesis is considered to be an alternative process to produce liquid hydrocarbons in an environmentally sustainable way by using synthesis gas obtained from renewable resources. The combination of acid catalysts, such as zeolites, with Fischer‐Tropsch catalysts could lead to an increase in the selectivity to an specific range of hydrocarbons, such as synthetic paraffinic kerosene. Therefore, the conversion of synthesis gas in hydrocarbons within kerosene range using catalytic dual beds formed by a potassium‐cobalt‐promoted iron and zeolites H‐ZSM‐5 and H‐ZSM‐12 has been studied. The reactions have been carried out at 250°C, 20 bar in a stacked fixed dual bed using synthesis gas with a H2:CO molar ratio of 2 during 60 hours. The selectivity towards C9‐C16 hydrocarbons was increased from 25% using the FT catalyst without zeolite, and up to 30% by using zeolites H‐ZSM‐5 or H‐ZSM‐12 with a Si/Al of 30 and 60, respectively. The results allowed the development of a reaction scheme suitable to design a tunable process for the synthesis gas conversion.

Syngas Purpose Pyrolysis-Gasification of Organic Fractions of MSW over Metal-Loaded Y-Zeolite Catalysts

“…In addition, pyrolysis and gasification of OFMSW are also promising methods [16] and result in the formation of valuable CO and H 2 -rich syngas, liquid, and solid residue (char) [17]. The obtained syngas can be used as a feedstock for methanol or Fischer-Tropsch synthesis [18], while the liquid product can be used as an alternative hydrocarbon source for fuel and other high-value chemical production [19], i.e., pyrolysis and gasification can contribute to the reduction of landfilled waste providing a better waste treatment option [20] and alternative energy production at the same time [21]. Due to the abovementioned reasons, this treatment of MSW gained significant attention among researchers in the past years and several scientific papers and reviews have been made in the topic of pyrolysis and gasification [22].…”