Carbon nanotube-supported Pd–ZnO catalyst for hydrogenation of CO2 to methanol

Liang, Xiaoping; Dong, Xinfa; Lin, Guo-Dong; Zhang, Hongbin

doi:10.1016/j.apcatb.2008.11.018

Cited by 277 publications

(152 citation statements)

References 24 publications

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“…Actions to diminish the human influence on the climate that started with the industrial revolution 2 are urgently called upon. There are two main strategies to reverse the increasing trend of CO2 concentration in the atmosphere: reducing the amount of emitted CO2 per unit time, and utilizing CO2 that is currently being emitted in various processes [2][3][4] . For the second strategy, the CO2 exhaust produced in industry can be redirected into processes where it will be used as a reactant and converted to less harmful molecules.…”

Section: Introductionmentioning

confidence: 99%

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Atakan

Erdtman

Mäkie

et al. 2018

Journal of Catalysis

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The self-archived postprint version of this journal article is available at Linköping University Institutional Repository (DiVA): http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-147297 N.B.: When citing this work, cite the original publication.Atakan, A., Erdtman, E., Mäkie, P., Ojamäe, L., Odén, M., (2018) ABSTRACT: Time evolution of catalytic CO2 hydrogenation to methanol and dimethyl ether (DME) has been investigated in a hightemperature high-pressure reaction chamber where products accumulate over time. The employed catalysts are based on a nano-assembly composed of Cu nanoparticles infiltrated into a Zr doped SiOx mesoporous framework (SBA-15): Cu-Zr-SBA-15. The CO2 conversion was recorded as a function of time by gas chromatography-mass spectrometry (GC-MS) and the molecular activity on the catalyst's surface was examined by diffuse reflectance in-situ Fourier transform infrared spectroscopy (DRIFTS). The experimental results showed that after 14 days a CO2 conversion of 25% to methanol and DME was reached when a DME selective catalyst was used which was also illustrated by thermodynamic equilibrium calculations. With higher Zr content in the catalyst, greater selectivity for methanol and a total 9.5 % conversion to methanol and DME was observed, yielding also CO as an additional product. The time evolution profiles indicated that DME is formed directly from methoxy groups in this reaction system. Both DME and methanol selective systems show the thermodynamically highest possible conversion.

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Section: Introductionmentioning

confidence: 99%

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Atakan

Erdtman

Mäkie

et al. 2018

Journal of Catalysis

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“…161 Pd/ZnO catalysts supported on multi-walled carbon nanotubes (MWCNTs) exhibit excellent performance for the formation of methanol owing to an increasing concentration of active Pd 0 species. 164 MWCNTs-supported Pd/ZnO catalysts could reversibly adsorb enhanced amount of hydrogen, which favors for the generation of a micro-environment with higher concentration of active hydrogen species and increases the reaction rate of the surface hydrogenation. Pd/Ga 2 O 3 catalyst reveals remarkable activity and selectivity in the methanol synthesis owing to the formation of new active sites by Pd-Ga alloy.…”

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confidence: 99%

Recent advances in catalytic hydrogenation of carbon dioxide

et al. 2011

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Owing to the increasing emissions of carbon dioxide (CO 2 ), human life and the ecological environment have been affected by global warming and climate changes. To mitigate the concentration of CO 2 in the atmosphere various strategies have been implemented such as separation, storage, and utilization of CO 2 . Although it has been explored for many years, hydrogenation reaction, an important representative among chemical conversions of CO 2 , offers challenging opportunities for sustainable development in energy and the environment. Indeed, the hydrogenation of CO 2 not only reduces the increasing CO 2 buildup but also produces fuels and chemicals. In this critical review we discuss recent developments in this area, with emphases on catalytic reactivity, reactor innovation, and reaction mechanism. We also provide an overview regarding the challenges and opportunities for future research in the field (319 references).

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“…This would generate a surface micro-environment with high stationary-state concentration of H-adspecies at the surface of the functioning catalyst, especially at the Pt x 0 active-sites, since the highly conductive CNTs may promote hydrogen spill-over from the CNTs to the Pt x 0 activesites, and thus be favorable to increasing the rate of the HDA reaction of toluene and tetralin. This is very similar to the cases in synthesis of methanol from CO hydrogenation over the CNT-promoted Cu-ZnO-Al 2 O 3 [23,24] or from CO 2 hydrogenation over CNT-promoted Pd-ZnO [25]. In contrast, due to the lacking of the graphene-like structure and surface consisted of sp 2 -C, AC may simply act as the catalyst support with low capability of adsorbing H 2 (see Fig.…”

Section: Nature Of Promoter Action By Cntsmentioning

confidence: 55%

Pt Catalyst Supported on Multi-Walled Carbon Nanotubes for Hydrogenation-Dearomatization of Toluene and Tetralin

et al. 2010

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A type of MWCNT-supported Pt catalysts for the hydrogenation-dearomatization (HDA) of aromatics was developed, which displays excellent performance for HDA of two model compounds, toluene and tetralin. Over the 1% Pt/CNTs catalyst, near 100% conversion of toluene or tetralin was observed under the reaction temperature of 373 K. The specific reaction rate of HDA of toluene and tetralin reached 0.0524 and 0.0174 mmol s(-1) (m(-surf.)(2) (Pt))(-1), respectively. Both of the values were 1.18 times those (0.0444 and 0.0148 mmol s(-1) (m(-surf. Pt)(2))(-1), respectively) of the 2.4% Pt/AC catalyst with the optimal Pt loading under the same reaction conditions. It was experimentally found that using the CNTs in place of AC as the support of the catalyst did not cause a significant change in the apparent activation energy for the HDA reaction of toluene or tetralin, but led to a certain increase in the molar percentage of catalytically active Pt-species (Pt-0) in the total Pt-amount at the surface of the functioning catalyst. In addition, the Pt/CNTs catalyst could reversibly adsorb a greater amount of hydrogen under atmospheric pressure and temperatures ranging from room temperature to 773 K. This unique feature would help to generate a microenvironment with higher stationary state concentration of active hydrogen-adspecies at the surface of the functioning catalyst. These effects favored increasing the rate of the HDA reaction of toluene or tetralin.National Basic Research ("973'') of China [2009CB939804

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Carbon nanotube-supported Pd–ZnO catalyst for hydrogenation of CO2 to methanol

Cited by 277 publications

References 24 publications

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Recent advances in catalytic hydrogenation of carbon dioxide

Pt Catalyst Supported on Multi-Walled Carbon Nanotubes for Hydrogenation-Dearomatization of Toluene and Tetralin

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