Preparation and characterization of carbon nanotube-promoted Co–Cu catalyst for higher alcohol synthesis from syngas

Dong, Xinfa; Liang, Xiaoping; Li, Haiyan; Lin, Guo-Dong; Zhang, Peng; Zhang, Hongbin

doi:10.1016/j.cattod.2008.11.025

Cited by 90 publications

(68 citation statements)

References 28 publications

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“…XPS-analysis of the tested Co-Cu catalysts, carried out by Dong et al [12][13][14], revealed that significant difference in valence-state of the surface Co-species, but little difference in that of Cu, existed between the functioning Co 3 Cu 1 -11%CNT catalyst and its CNT-free counterpart, Co 3 Cu 1 (Fig. 20).…”

Section: Effect Of Mwcnts On Chemical State Of Catalystmentioning

confidence: 98%

“…A type of CNT-promoted Co-Cu catalysts, which displays excellent performance for highly effective and selective formation of C 1-8 -oxygenates, especially BuOH and DME, from syngas, was developed recently by Dong et al [12][13][14]. The catalysts, denoted as Co i Cu j -x% (mass percentage) CNT, were prepared by constant-pH co-precipitation method, using the homemade ''herringbone-type'' CNTs [35,36] (symbolized as ''CNTs(h-type)'' and simplified as ''CNTs'' in later text, unless otherwise specified) and nitrates of the corresponding metallic components as initial materials.…”

Section: Mwcnt-promoted Co-cu Catalystsmentioning

confidence: 99%

“…The apparent activation energy (E a ) of the HAS reaction from syngas over the CNT-promoted Co-Cu catalyst was measured at the reaction conditions of 2.0 MPa, 523-583 K, V(H 2 )/V(CO)/V(CO 2 )/V(N 2 ) = 45/45/5/5, GHSV = 12,000 mL STP /(hÁg) [12][13][14]. The results (see Fig.…”

Section: Mwcnt-promoted Co-cu Catalystsmentioning

confidence: 99%

“…Since the first study concerning application of carbon nanotubes as support in heterogeneous catalysis was reported in 1994 [2], dozens of papers on applications of carbon nanotubes in catalysis, including the review articles by Serp et al [3] and Zhang et al [4] recently, have been published. The covered catalytic applications range from selective hydrogenation of a, b-unsaturated aldehydes [2,5], hydrofomylation of alkenes [6], decomposition of NO [7], ammonia synthesis [8], Fischer-Tropsch synthesis [9], methanol synthesis [10,11], and higher alcohol synthesis [12][13][14][15][16][17], to selective dehydrogenation [18], selective oxidation [19] and electrocatalysis [20], etc. Those studies have greatly deepened the knowledge of this kind of nanocarbon materials and shed light on the exploitation of its new application in catalysis.…”

Section: Introductionmentioning

confidence: 99%

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Multi-Walled Carbon Nanotubes as a Novel Promoter of Catalysts for CO/CO2 Hydrogenation to Alcohols

et al. 2009

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Multi-walled carbon-nanotubes (MWCNTs) are drawing increasing attention in recent years. This material possesses a series of unique features, such as its nanometer-sized channel, highly conductive graphitized tube-wall, sp (2)-C-constructed surface, and excellent performance for adsorption and spillover of hydrogen, which make the MWCNTs full of promise to be a novel catalyst support or promoter. This article will review the recent progress in applied research of MWCNTs as a novel promoter in heterogeneous catalysis for active components, including metals and their oxides, with the emphasis on the study and development of MWCNT-promoted catalysts related to CO/CO2 hydrogenation to alcohols and dimethyl ether based on the recent works carried out in our laboratory.National Natural Science Foundation [20590364]; National Basic Research ("973") of China [2005CB221403, 2009CB939804

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Section: Effect Of Mwcnts On Chemical State Of Catalystmentioning

confidence: 98%

Section: Mwcnt-promoted Co-cu Catalystsmentioning

confidence: 99%

Section: Mwcnt-promoted Co-cu Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multi-Walled Carbon Nanotubes as a Novel Promoter of Catalysts for CO/CO2 Hydrogenation to Alcohols

et al. 2009

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“…They were Cox 0 , CoO and Co(OH)2 with the corresponding Co n+ (2p3/2) B.E. values at 778.0 eV, 780.4 eV and 782.0 eV, respectively [35][36][37]. The binding energies of Co n+ (2p3/2) for the reference compounds, along with their relative intensities, are given in Table 2.…”

Section: Xrd and Xps Characterizationmentioning

confidence: 99%

Improved H2 Production by Ethanol Steam Reforming over Sc2O3-Doped Co-ZnO Catalysts

et al. 2017

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H 2 production by catalytically ethanol steam reforming (ESR) is an effective and prospective method for the application of fuel cells. However, the catalysts' desirable activity and stability remains an unprecedented challenge. Herein, a type of Sc 2 O 3 -doped Co-ZnO catalyst was developed by a co-precipitation method. The so-constructed Co 2 Zn 1 Sc 0.3 catalyst exhibited a superb catalytic performance compared with Co-ZnO, giving a STY(H 2 ) as high as 1.099 mol·h −1 ·g -cat −1 (data taken 100 h after the reaction started). In comparison, the pristine Co-ZnO catalyst only afforded a STY(H 2 ) of 0.684 mol·h −1 ·g -cat −1 under identical reaction conditions. Characterization results revealed that the Sc 2 O 3 dopant strengthened the electronic interaction between Co species and ZnO, which was in favour of elevating the reduction temperature of Co oxides and boosting the dispersion of the Co n+ (n = 1 or 2). The introduction of Sc 2 O 3 induced the formation of O 2− and OH − . All of these effects effectively inhibited the sintering of active Co species and markedly improved the activity and operating stability of the catalyst.

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Effect of reaction conditions on supercritical hexanes mediated higher alcohol synthesis over a CuCoZn catalyst

Zhang

Stewart

et al. 2014

AIChE Journal

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Higher alcohol synthesis (HAS) from syngas over a CuCo based catalyst was investigated under supercritical hexanes conditions. The effects of hexanes/syngas molar ratio, H2/CO molar ratio, and gas hourly space velocity (GHSV) on gas‐phase HAS and supercritical hexanes‐phase HAS (SC‐HAS) were investigated. The CO conversion remained relatively constant with increases in the hexanes/syngas molar ratio, whereas the CH4 selectivity decreased. Higher alcohol productivity was found to increase monotonically with an increase in the hexanes/syngas molar ratio. Productivity of higher alcohols increased with an increase in the H2/CO ratio under the gas‐phase conditions. An opposite trend in higher alcohol productivity with H2/CO was observed in SC‐HAS. Further experiments were performed using argon as the reaction medium for comparison with the supercritical hexanes medium results. The enhanced higher alcohol productivity observed in this system can be attributed to improved extraction of alcohol products from the catalyst pores under the supercritical conditions. © 2014 American Institute of Chemical Engineers AIChE J, 60: 1786–1796, 2014

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Preparation and characterization of carbon nanotube-promoted Co–Cu catalyst for higher alcohol synthesis from syngas

Cited by 90 publications

References 28 publications

Multi-Walled Carbon Nanotubes as a Novel Promoter of Catalysts for CO/CO2 Hydrogenation to Alcohols

Multi-Walled Carbon Nanotubes as a Novel Promoter of Catalysts for CO/CO2 Hydrogenation to Alcohols

Improved H2 Production by Ethanol Steam Reforming over Sc2O3-Doped Co-ZnO Catalysts

Effect of reaction conditions on supercritical hexanes mediated higher alcohol synthesis over a CuCoZn catalyst

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