Modeling a slurry CSTR with Co/P–Al2O3 catalyst for Fischer–Tropsch synthesis

A Single-Event MicroKinetic model for the cobalt catalyzed Fischer-Tropsch Synthesis

“…In other microkinetic modeling studies, a separate activation energy is typically estimated for the reductive elimination of a metal methyl to methane and for the formation of ethene [15,18,19,[21][22][23][24][25][26]88]. One activation energy for the beta hydride eliminations is confirmed by an ab initio study [85].…”

“…A direct observation of the surface species is lacking and changes in reaction conditions can initiate changes in the surface structure which, in turn, affect the local reactivity of the surface [66]. The use of direct CO dissociation as a possible CO activation step is, hence, a viable option [13,16,21,25,34,[67][68][69]. With respect to the chain growth step, it is noted that several microkinetic models have already adopted the carbide mechanism considering CH2 as the propagating species on Co [15,18,19,21,22,25].…”

“…There is a general consensus that the reaction proceeds through a polymerization-like scheme where the monomeric building block is formed on the catalyst surface and is inserted in a growing chain [1]. This has led to the development of various microkinetic models for Co catalyzed FTS [15][16][17][18][19][20][21][22][23][24][25][26]. Klinke et al [16] developed a microkinetic model based on direct CO dissociation and chain growth by inserting CHx species.…”

Stabilized ordered-mesoporous Co3O4 structures using Al pillar for the superior CO hydrogenation activity to hydrocarbons

“…This can be attributed to the strong adsorption character of CO molecules which subsequently block edge or corner sites rather than to H 2 -assisted dissociative adsorption of CO molecules on the larger cobalt particles [48]. It can also be attributed to the strong interaction of the metal-pillaring metal oxides, which can induce a higher oxidation state of cobalt particles by suppressing the absorption of H 2 and inevitably causes increasing CH 4 selectivity through a fast reaction rate for light hydrocarbon formation compared to the formation of the wax-like higher molecular weight linear hydrocarbons [2,[47][48][49][50]. Therefore, the observed higher CH 4 selectivity on the Al/meso-Co 3 O 4 seems to be mainly due to the presence of strongly interacted mainframe Co 3 O 4 surfaces with Al 2 O 3 pillaring particles as previously confirmed by TPR experiment.…”

Performance Study of stirred tank slurry reactor and fixed‐bed reactor using bimetallic Co–Ni mesoporous silica catalyst for fischer–tropsch synthesis

“…The tubular fixed-bed reactors (TFBR) FTS were first commercialized by Sasol in South Africa using iron catalyst since the 1950s [12]. However, the disadvantages of difficulty in temperature control, heavy capital investment, and difficulty in catalyst loading and regeneration [13,14] have been encouraging companies to develop a new reaction system to overcome the existing shortcomings of TFBR. With almost 30 years' continuous efforts, the commercial-scale FTS using slurry bubble column reactors (SBCR) began to be practiced by Sasol since the 1980s [15,16].…”