Catalyst Development for CO<sub>2</sub> Hydrogenation to Fuels

Rodemerck, Uwe; Holeňa, Martin; Wagner, Edmund; Smejkal, Quido; Barkschat, Axel; Baerns, M.

doi:10.1002/cctc.201200879

Cited by 164 publications

(117 citation statements)

References 34 publications

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“… reported that the long chain HC formation from CO 2 is thermodynamically unfavorable. However, their conclusion is not same as discovered from the recent experimental studies . Yao et al .…”

Section: Introductionmentioning

confidence: 55%

Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis

Ahmad

Upadhyayula

2018

Env Prog and Sustain Energy

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Over the past few years, chemical conversion of CO2 to alternative fuels such as methanol, dimethyl ether (DME), and hydrocarbons (HCs) is one of the hot topics in chemical engineering. Taking this into consideration, we have investigated the effects of wide range of temperature, pressure and H2/CO2 ratio (with and without CO) on the hydrogenation of CO2 to methanol, DME, and HCs by minimizing the Gibbs free energy. The energy calculations indicate that HC synthesis reaction has the minimum Gibbs free energy change. High pressure, low temperature, and high H2/CO2 ratio favored the methanol and DME synthesis. The HC synthesis is favored by high pressure, low temperature, and high H2/CO2 ratio, but the presence of CO has a major effect on the HC selectivity. The presence of CO suppresses CO2 conversion in all the three reactions studied. CO2 conversion is maximum for the HC synthesis at H2/CO2 > 3. The experimental data obtained from laboratory scale fixed bed reactor show a reasonable comparison with the simulation results. The thermodynamic analysis combined with the catalyst development and chemical kinetics are expected to lead towards a competent methodology for CO2 conversion. © 2018 American Institute of Chemical Engineers Environ Prog, 38: 98–111, 2019

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Section: Introductionmentioning

confidence: 55%

Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis

Ahmad

Upadhyayula

2018

Env Prog and Sustain Energy

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“…Another strategy to solve the problem is the capture and utilization of CO 2 as a feedstock for the production of fuels and chemicals . Thus, not only could the CO 2 concentration in the atmosphere be reduced but also valuable chemicals can be produced …”

Section: Introductionmentioning

confidence: 99%

Sandwich‐Like Silica@Ni@Silica Multicore–Shell Catalyst for the Low‐Temperature Dry Reforming of Methane: Confinement Effect Against Carbon Formation

2017

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We synthesize a new sandwich‐like silica@Ni@silica multicore–shell catalyst. Firstly, Ni phyllosilicate (NiPS) is supported on silica nanospheres by a simple ammonia evaporation method. Then NiPS is coated with a layer of mesoporous silica to obtain a core–shell NiPS@silica structure by the hydrolysis of tetraethylorthosilicate (TEOS). The thickness of the shell can be tuned by varying the amount of TEOS. After calcination and H2 reduction at high temperature, multiple small Ni nanoparticles (≈6 nm) are generated and supported on the inner silica core but also encapsulated within the outer mesoporous silica shell. This silica@Ni@silica multicore–shell catalyst shows a high and stable conversion (≈60 %, gas hourly space velocity=60 000 mL h−1 gcat−1) for the dry reforming of methane (DRM) at 600 °C, whereas pristine NiPS deactivates quickly because of heavy carbon formation. We investigated the spent catalysts by using thermogravimetric analysis and TEM and found that there is almost no carbon formation for this new multicore–shell catalyst. Compared with a conventional Ni@silica core–shell catalyst, our multicore–shell catalyst is much easier to synthesize and the process does not require any toxic organic solvents. We believe that this strategy to make a multicore–shell catalyst can be applied to more nanomaterials and extended to other catalytic reactions besides DRM.

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“…The hydrogenation of CO 2 to hydrocarbons or alcohols is of great potential significance for the production of renewable fuels and as a possible means for decreasing the overall CO 2 emissions [1][2][3][4][5]. Copper is the main component of the commercial catalysts for the industrially important gas phase CO 2 hydrogenation to CH 3 OH.…”

Section: Introductionmentioning

confidence: 99%

“…Copper is the main component of the commercial catalysts for the industrially important gas phase CO 2 hydrogenation to CH 3 OH. It also exhibits substantial activity and selectivity for CO 2 hydrogenation in aqueous electrochemistry [4][5][6][7][8]. During the last several decades other metals (e.g.…”

Section: Introductionmentioning

confidence: 99%