Effect of pore size diameter of cobalt supported catalyst on gasoline-diesel selectivity

Intarasiri, Saowaluk; Ratana, Tanakorn; Sornchamni, Thana; Phongaksorn, Monrudee; Tungkamani, Sabaithip

doi:10.1016/j.egypro.2017.10.090

Cited by 11 publications

(6 citation statements)

References 7 publications

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“…The variation of the pore size in 4.9-10 nm had no obvious effect on C4+ selectivity, except for S1 catalyst. The above result was agreed with the previous literatures [13,27]. The larger cobalt particles were formed on the larger pore size of the support, which was easier to form a long chain of hydrocarbon [13].…”

Section: R E T R a C T E Dsupporting

confidence: 93%

“…The above result was agreed with the previous literatures [13,27]. The larger cobalt particles were formed on the larger pore size of the support, which was easier to form a long chain of hydrocarbon [13]. However, the further increasing the pore size of catalyst had no significant effect on C4+ selectivity.…”

Section: R E T R a C T E Dsupporting

confidence: 92%

“…Therefore, a balance of the interactions between the supports and cobalt is significantly important for FTS cobalt-based catalyst [12]. The dispersion of cobalt metal and the surface area of this active ingredient are significantly dependent on the support, and larger particle sizes result in a lower dispersion of metallic Co metallic [13,14].…”

Section: Introductionmentioning

confidence: 99%

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RETRACTED: The Influence of Texture on Co/SBA–15 Catalyst Performance for Fischer–Tropsch Synthesis

et al. 2018

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The influence of the Co/SBA-15 catalyst texture, such as pore size and pore length on Fischer-Tropsch (FT) Synthesis, was investigated in this paper. The morphology, structure, and microstructures of Co/SBA-15 catalysts were characterized by SEM, Brunauer-Emmett-Teller (BET), TPR, HRTEM, and XRD. The experimental results indicated that the increase of pore size could improve the activity of the Co/SBA-15 catalyst, and the further increase of pore size could not significantly promote the activity. Moreover, it was also found that the pore length of the Co/SBA-15 catalyst played a key role in the catalytic activity. CO 2 and C4+ selectivity were 2.0% and 74% during the simulated syngas (64% H 2 : 32% CO: balanced N 2 ) FT over the Co/SBA-15 catalysts, and CO conversion rate and CH 4 selectivity were 10.8% and 15.7% after 100 h time on stream.2 of 11 has uniform hexagonal channels and high thermal stability. The above features of SBA-15 lead to it being regarded as a suitable support for FTS catalyst [16]. Cai et al. and Wang et al. reported that the CO conversion was 6.51%-20.51%, and C 5+ selectivity was 42.43%-77.14% when Ru promoted Co/SBA-15 catalysts was used in FTS [17,18]. García et al. explored the effects of the Co-SiO 2 interaction, and thought that SBA could suppress the aggregation of metal particles and promote the metal dispersion [19].In this paper, the effect of the texture of Co/SBA-15 on FTS performance was investigated. Moreover, the reaction temperature and Co loading were also discussed. Results and DiscussionSEM images of SBA-15 are presented in Figure 1. SBA-15 consisted of aligned rod-like particles with a diameter of 1 µm and a length of 2-3 µm longwise, which coincided with the results of Prieto et al. [20]. It could be clearly observed from Figure 2 that SBA-15 had a well-ordered hexagonal crystal structure composed of one-dimensional channels, which was highly ordered and stable [21].Catalysts 2018, 8, x FOR PEER REVIEW 2 of 12

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Section: R E T R a C T E Dsupporting

confidence: 93%

Section: R E T R a C T E Dsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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RETRACTED: The Influence of Texture on Co/SBA–15 Catalyst Performance for Fischer–Tropsch Synthesis

et al. 2018

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“…The uniformity can provide efficient transport pathways for electrolyte ions and create high active sites for methanol oxidation. [36][37][38][39][40] Moreover, as shown in the Table 1, the nanohybrid NiCr-LDH has the highest value of average pore width of 56Å. The redox reactions efficiency of both CoCr-LDH and NiCoCr-LDH nanohybrids may be reduced since CoCr-LDH (51Å) has large pore size diameter with non-uniform distribution while NiCoCr-LDH (27Å) has narrow pore size distribution with uniform size.…”

Section: à2mentioning

confidence: 98%

Nanohybrid layered double hydroxide materials as efficient catalysts for methanol electrooxidation

et al. 2019

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“…The support pore channel usually provides the space for the dispersion of metal species, as well as the diffusion of reactants and products, which usually bring about a special confinement effect. , Therefore, the pore size effect of the support is significant in determining the catalytic performance and product distribution as it can profoundly impact the dispersion of metal, reducibility, and mass transport performance. − Zhao et al found that carbon nanotube (CNT) size affected the formation of Cu species, the interaction between Cu and CNTs that can effectively determine the stability, and the catalytic performance of Cu for oxidative carbonylation of methanol to methyl carbonate. It has been also reported that not only pellet sizes but also the pore size , of Co catalyst for FTS affected the internal diffusion that seriously controls the catalytic performance.…”

Section: Resultsmentioning

confidence: 99%

Ammonia Hydrothermally Treated SiO₂ Supported Rh-Based Catalyst for CO Hydrogenation to C₂ Oxygenates: Remarkable Effect of Support Pore Size

Chen

Song

Ning

et al. 2020

Ind. Eng. Chem. Res.

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Silica is a traditional carrier for Rh-based catalyst for CO hydrogenation to C 2 oxygenates, and its pretreatment with various organic solvents under specified conditions usually affects the surface and textural properties of silica and thus the catalytic performance of Rh-based catalyst. In this paper, silica samples were hydrothermally treated with different concentrations of ammonia and were used to support Rh-based catalysts. The as-made supports and the respective catalysts were characterized by N 2 adsorption−desorption, TEM, XRD, FT-IR, H 2 -TPR, CO chemisorption, CO-TPD, and temperature-programmed surface reaction (TPSR). The results showed that the hydrothermal treatment enlarged the pore size of silica gradually from 8.1 nm on parent sample to 26.5 nm on that treated by 10% ammonia. Smaller pore size usually with higher surface area of silica was beneficial to the formation of highly dispersed Rh species; however, the mean Rh particle sizes here were within the optimal range of 2−4 nm. It was also demonstrated that, with the increasing of pore size of silica, the CO insertion ability weakened, while the CO dissociation capability strengthened relatively; meanwhile, the diffusion limitation of CO could be eliminated gradually, leading to a decrease of the local H 2 /CO ratio during CO hydrogenation reaction. This could restrain the hydrogenation ability but facilitate the CO dissociation or insertion. Consequently, carbon chain propagation was much promoted to give more C 2 + hydrocarbons, while the hydrogenation of C 2 oxygenate precursors was prohibited to yield much less ethanol. Moreover, Rh-based catalysts supported on larger pore sizes of silica were more stable than that on the untreated one. This finding provides a useful strategy to effectively adjust the catalytic performance of Rh-based catalyst through controlling internal diffusion by selecting a support with the proper pore size.

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Effect of pore size diameter of cobalt supported catalyst on gasoline-diesel selectivity

Cited by 11 publications

References 7 publications

RETRACTED: The Influence of Texture on Co/SBA–15 Catalyst Performance for Fischer–Tropsch Synthesis

RETRACTED: The Influence of Texture on Co/SBA–15 Catalyst Performance for Fischer–Tropsch Synthesis

Nanohybrid layered double hydroxide materials as efficient catalysts for methanol electrooxidation

Ammonia Hydrothermally Treated SiO₂ Supported Rh-Based Catalyst for CO Hydrogenation to C₂ Oxygenates: Remarkable Effect of Support Pore Size

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Effect of pore size diameter of cobalt supported catalyst on gasoline-diesel selectivity

Cited by 11 publications

References 7 publications

RETRACTED: The Influence of Texture on Co/SBA–15 Catalyst Performance for Fischer–Tropsch Synthesis

RETRACTED: The Influence of Texture on Co/SBA–15 Catalyst Performance for Fischer–Tropsch Synthesis

Nanohybrid layered double hydroxide materials as efficient catalysts for methanol electrooxidation

Ammonia Hydrothermally Treated SiO2 Supported Rh-Based Catalyst for CO Hydrogenation to C2 Oxygenates: Remarkable Effect of Support Pore Size

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Ammonia Hydrothermally Treated SiO₂ Supported Rh-Based Catalyst for CO Hydrogenation to C₂ Oxygenates: Remarkable Effect of Support Pore Size