The Fischer–Tropsch (FT) process consists of the reaction a synthesis gas (syngas) mixture containing carbon monoxide (CO) and hydrogen (H2), which are polymerized into liquid hydrocarbon chains, often using cobalt catalyst, although mechanistic pathway is not yet fully understood. Here, we have employed unrestricted density functional theory calculations with Hubbard Hamiltonian long-range dis...

fischer-tropsch catalysts with high activity and selectivity for olefins were produced using mordenite type sio2/al2o3= 12, 20, 28, 62 zeolite supported iron carbonyl compounds and were characterized by x-ray powder diffraction. the adsorptionof volatile fe(co)5 on the support surface was carried out under vacuum at room temperature. reduction les were monitored by vibrating sample magnetometer...

Hierarchical structured α-Al2O3 is shown to be able to effectively disperse and immobilize iron species, in comparison with commercial α-Al2O3. After promotion using an appropriate amount of sulfur, iron catalysts exhibit not only enhanced Fischer-Tropsch synthesis activity and selectivity toward lower olefins, but also increased resistance against carbon deposits.

the effects of electronic properties of inner and outer surfaces of carbon nano tubes (cnts) on the deactivation of cobalt fischer-tropsch (ft) catalysts were studied. the comparative characterization of the fresh and used catalysts by tem, xrd, tpr, bet and h2 chemisorption showed that cobalt re-oxidation, cobalt-support interactions and sintering are the main sources of catalyst deactivation....

This contribution is based on the monograph entitled “Recent Advances in Thermochemical Conversion of Biomass”, covering both general items as well as the primary processes, like fast pyrolysis, gasification, hydrothermal liquefaction, carbonization and secondary processes, like co-processing of bio-oil in fluidized catalytic cracking (FCC), Fischer-Tropsch synthesis and valorization of lignin ...

Pd/C and CoPd/C heterogeneous catalysts have been synthesized by adopting Charge Enhanced Dry Impregnation (CEDI). The particles size distribution, their high metal surface-to-bulk ratios, and synthesis feasibility are unmatchable to any known noble metal bimetallic heterogeneous catalyst preparation techniques. Next generation Fuel Cells and Fischer-Tropsch catalytic processes economy will be ...

Although two-stage gasifier design offers a number of advantages i.e., producing high-quality gas (high H2 content, low CO2 and other impurities) tolerating high degree heterogeneity feedstock, its economic feasibility is yet to be evaluated. In this study, techno-economic assessment fully conducted assess the gasification system for three routes: hydrogen production, liquid fuels via Fischer-T...

Abstract Active areas of research on chemical looping technologies for the conversion CO 2 to are contrasted and discussed , including current performance, methods material design, next steps in expanding their development. Generation from is interest sustainable chemistry engineering convert anthropogenic emissions into feedstock Fischer–Tropsch (FT), methanol gasoline (MTG), gas-to-liquid (GT...

Finding a way for mitigating climate change is one of the main challenges our generation. Sorption-enhanced gasification (SEG) process by which syngas as an important intermediate synthesis e.g., dimethyl ether (DME), bio-synthetic natural gas (SNG) and Fischer–Tropsch (FT) products or hydrogen can be produced using biomass feedstock. It can, therefore, contribute to replacement fossil fuels re...

Microkinetics simulations are presented on the intrinsic activity and selectivity of the Fischer-Tropsch reaction with respect to the formation of long chain oxygenated hydrocarbons. Two different chain growth mechanisms are compared: the carbide chain growth mechanism and the CO insertion chain growth mechanism. The microkinetics simulations are based on quantum-chemical data on reaction rate ...