Investigation of K-promoted Cu-Zn-Al, Cu-X-Al and Cu-Zn-X (X=Cr, Mn) catalysts for carbon monoxide hydrogenation to higher alcohols

Heracleous, Eleni; Liakakou, E.T.; Lappas, Angelos A.; Lemonidou, Angeliki A.

doi:10.1016/j.apcata.2013.02.001

Cited by 91 publications

(60 citation statements)

References 34 publications

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“…Higher temperatures enhance significantly the formation of hydrocarbons and CO 2 , in agreement with our previous results regarding higher alcohols formation over Cu-based catalysts [46]. Xiaoding et al [47] and Tien-Thao et al [48] have also reported that CO 2 formation is favored at higher temperatures, resulting in a change in the H 2 /CO ratio, which directly affects the higher alcohol formation.…”

Section: Effect Of Type and Pre-treatment Of Activated Carbon Supportsupporting

confidence: 74%

“…In a previous work by our group on K-promoted Cu Zn Al catalysts for higher alcohol synthesis [46], an inverse correlation between acidity and higher alcohols selectivity was established, indicating that reduced acidity favors aldol-type condensation reactions and thus production of higher alcohols. Previously reported results by several researchers indicate that the basicity of the support facilitates the production of alcohols and other oxygenated compounds for Mo-based catalysts, in a similar way [50][51][52].…”

Section: Correlation Between Acidity and Higher Alcohols Formationmentioning

confidence: 90%

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K-promoted NiMo catalysts supported on activated carbon for the hydrogenation reaction of CO to higher alcohols: Effect of support and active metal

Liakakou

Heracleous

Triantafyllidis

et al. 2015

Applied Catalysis B: Environmental

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Section: Effect Of Type and Pre-treatment Of Activated Carbon Supportsupporting

confidence: 74%

Section: Correlation Between Acidity and Higher Alcohols Formationmentioning

confidence: 90%

K-promoted NiMo catalysts supported on activated carbon for the hydrogenation reaction of CO to higher alcohols: Effect of support and active metal

Liakakou

Heracleous

Triantafyllidis

et al. 2015

Applied Catalysis B: Environmental

Self Cite

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“…Mixed higher alcohols are major by‐products during carbon monoxide hydrogenation with methanol synthesis catalysts. It has been shown previously that promotion with alkali ions (e.g., Na, K, and Cs) could increase, to some extent, the selectivity of these catalysts towards higher alcohols 19–23. Alkali promoters could provide basic sites for the aldol‐type condensation and thus increase higher alcohol selectivity 19.…”

Section: Introductionmentioning

confidence: 98%

“…Alkali promoters could provide basic sites for the aldol‐type condensation and thus increase higher alcohol selectivity 19. 23 Some increase in higher alcohol productivity was also observed upon the promotion of the CuCo/Al 2 O 3 catalyst24 as well as CuMnZn and CuMnZr catalysts25–27 with Fe.…”

Section: Introductionmentioning

confidence: 99%

Effects of Metal Promotion on the Performance of CuZnAl Catalysts for Alcohol Synthesis

Beiramar¹,

Griboval-Constant²,

Khodakov³

2014

ChemCatChem

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A series of CuZnAl catalysts modified with different promoters (Fe, Co, Ru, Zr, Mo, Mg, Mn, and Cr) have been prepared through co‐precipitation, characterised by applying a combination of techniques, and tested for carbon monoxide hydrogenation. Cu reducibility in CuZnAl catalysts was affected by the addition of promoters. The ease of Cu reduction in the promoted catalysts leads to more active catalysts for the hydrogenation of carbon monoxide and the production of C2+ alcohols, whereas lower catalytic activity was observed over less reducible catalysts. The promotion of CuZnAl catalysts even with small amounts of Cr, Mn, and Fe resulted in a significant modification in the reaction selectivity. The Fe‐containing catalyst demonstrated a dramatic increase in carbon monoxide conversion and C2+ alcohol productivity (30 mg g${{{- 1\hfill \atop {\rm cat}\hfill}}}$ h−1).

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“…Modified methanol synthesis catalysts produce mainly methanol 6 . Rh-based catalysts possess a comparatively high selectivity to ethanol and good activity 7,8 , while the price of Rh is too high.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticles of Cu–Co alloy derived from layered double hydroxides and their catalytic performance for higher alcohol synthesis from syngas

et al. 2015

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A series of layered double hydroxides (LDHs) with different Cu/Co ratio were prepared according to the coprecipitation method and used as catalyst precursors for higher alcohols synthesis. The prepared samples were characterized by XRD, TPR, SEM, TEM and BET techniques. After calcination, LDHs were transformed into a mixture of CuO, Co3O4, CuCo2O4 and alumina, and these oxides were mixed uniformly with size in several nanometers. For the sample with ratio of Cu/Co = 1/2, copper and cobalt species are mainly in CuCo2O4 phase. In the reduction process, the superior mixed copper and cobalt species in nanoscale were reduced to Cu-Co alloy, which was confirmed by XRD and TEM results. The prepared bimetallic catalysts showed high activity, good stability and much high selectivity to C2+ alcohols. Over the best catalyst, CO conversion of 51.8%, selectivity to alcohols of 45.8% and 94.3 wt. % of C2+OH in the total alcohols were obtained at 250ºC, 3MPa and GHSV of 3900 mL (gcat h) -1 .

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Investigation of K-promoted Cu-Zn-Al, Cu-X-Al and Cu-Zn-X (X=Cr, Mn) catalysts for carbon monoxide hydrogenation to higher alcohols

Cited by 91 publications

References 34 publications

K-promoted NiMo catalysts supported on activated carbon for the hydrogenation reaction of CO to higher alcohols: Effect of support and active metal

K-promoted NiMo catalysts supported on activated carbon for the hydrogenation reaction of CO to higher alcohols: Effect of support and active metal

Effects of Metal Promotion on the Performance of CuZnAl Catalysts for Alcohol Synthesis

Nanoparticles of Cu–Co alloy derived from layered double hydroxides and their catalytic performance for higher alcohol synthesis from syngas

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