Dimethyl ether synthesis from CO2 hydrogenation over hybrid catalysts: effects of preparation methods

Kornas, Agnieszka; Grabowski, R.; Śliwa, Michał; Samson, K.; Ruggiero-Mikołajczyk, Małgorzata; Żelazny, A.

doi:10.1007/s11144-017-1153-7

Cited by 18 publications

(9 citation statements)

References 14 publications

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“…The results are summarized in Figure a–c. Methanol synthesis and its dehydrogenation to DME reaction occur alternately in a series . DME synthesis is therefore related to the methanol formation from CO 2 .…”

Section: Resultsmentioning

confidence: 99%

“…CO 2 Hydrogenation to DME Influence of P and T Pressure, temperature, and H 2 /CO 2 (with or without CO) are the parameters that were varied to study their influence on CO 2 conversion, and selectivity to DME and methanol. The results are summarized in Figure 6a its dehydrogenation to DME reaction occur alternately in a series [36,37]. DME synthesis is therefore related to the methanol formation from CO 2 .…”

Section: Influence Of Co Presencementioning

confidence: 92%

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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: Resultsmentioning

confidence: 99%

Section: Influence Of Co Presencementioning

confidence: 92%

Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis

Ahmad

Upadhyayula

2018

Env Prog and Sustain Energy

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“…The highest CO 2 conversions were obtained for the hybrid catalysts with metallic function synthesized by co-precipitation method with NaOH. As described in our previous paper [32], for the CZ NaOH metallic function the active copper phase is better dispersed on the catalyst surface. This suggests that CuO in the CZ NaOH component is better exposed to substrates than in the CZ citric component what results in higher CO 2 conversion.…”

Section: Results Of Catalytic Activity Measurementsmentioning

confidence: 53%

“…The metallic component was prepared by co-precipitation method using NaOH or citric acid as a precipitant agent in accordance with the procedure presented in our previous article [32]. On the basis of the earlier results, Cu/ZrO 2 synthetized with NaOH (CZ NaOH ) and citric acid (CZ citric ) calcinated at 350 °C was chosen as the metallic functions.…”

Section: Preparation Of Hybrid Catalystsmentioning

confidence: 99%

Direct hydrogenation of CO2 to dimethyl ether (DME) over hybrid catalysts containing CuO/ZrO2 as a metallic function and heteropolyacids as an acidic function

Kornas

Śliwa

Ruggiero-Mikołajczyk

et al. 2020

Reac Kinet Mech Cat

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Dimethyl ether (DME) is considered as a substitution of diesel oil. It can be used in diesel engines because of its high cetane number (> 55). The combustion process does not generate particle matter (PM) or sulphur oxides (SO x) pollutions. One of the methods to obtain DME is direct synthesis from a CO 2 and H 2 mixture. On the other hand, CO 2 is an attractive reagent, which is a safe and economical source of carbon. The aim of this work was to obtain DME in the direct process from the mixture CO 2 and H 2 in the presence of hybrid catalyst. In these catalytic the CuO/ ZrO 2 was selected as a metallic function. The montmorillonite K10 modified by heteropolyacids was selected as an acidic function. The catalysts were obtained by different preparation methods and contained various types of heteropolyacids. The catalysts were characterized by following methods: BET/BJH, XRD, SEM, DCS/ TG, NH 3-TPD and FT-IR. The direct hydrogenation of CO 2 was performed in the high pressure fixed-bed flow reactor connected online with GC equipped with TCD and FID detectors. It was shown that both synthesis method of metallic function and the type of heteropolyacids have influence on the total catalytic activity of the hybrid catalyst. The acidity and thermal stability of HPAs are identified as the most important parameters having a decisive influence on the overall catalytic activity of the samples.

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“…Co/Al oxides catalyst was reduced at lower temperatures than Co/Zr oxides. Cu/Zr oxides catalyst was reduced from CuO to Cu 0 , it revealed strong single peak at 582 K [33]. Cu/Al oxides catalyst was reduced at temperature about 30 K higher than Cu/Zr oxides catalyst.…”

Section: Resultsmentioning

confidence: 93%

Investigation on binary copper-based catalysts used in the ethanol steam reforming process

Hamryszak

Madej-Lachowska

Kulawska

et al. 2020

Reac Kinet Mech Cat

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The use of copper-based binary catalysts, Cu/Zr oxides and Cu/Al oxides, has been examined to produce hydrogen from ethanol in the ethanol steam reforming process. The examined catalysts were compared with non-noble bicomponent catalysts consisting of oxides of nickel and cobalt: Ni/Zr Co/Zr, Ni/Al and Co/Al, prepared and tested in the identical way. Catalytic tests were carried out in the fixed-bed reactor in the temperature range 433-873 K for initial molar ratio of ethanol to water equal to 1:3. Ethanol conversion approached near 100%. Catalysts were characterized by XRD, TPR. Cu/Zr oxides . The catalyst showed very good selectivity. It is significant that carbon monoxide appeared only above 600 K and its selectivity has not exceeded 3% in the higher temperature range. No methane has been detected. Hydrogen yield was relatively stable in the temperature range from 513 to 873 K. Similarly, in the presence of Cu/Al oxides neither CO nor CH 4 were found in the products. The correlation between activity of examined catalysts and textural properties was not found.

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Dimethyl ether synthesis from CO2 hydrogenation over hybrid catalysts: effects of preparation methods

Cited by 18 publications

References 14 publications

Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis

Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis

Direct hydrogenation of CO2 to dimethyl ether (DME) over hybrid catalysts containing CuO/ZrO2 as a metallic function and heteropolyacids as an acidic function

Investigation on binary copper-based catalysts used in the ethanol steam reforming process

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Dimethyl ether synthesis from CO2 hydrogenation over hybrid catalysts: effects of preparation methods

Cited by 18 publications

References 14 publications

Greenhouse gas CO2 hydrogenation to fuels: A thermodynamic analysis

Greenhouse gas CO2 hydrogenation to fuels: A thermodynamic analysis

Direct hydrogenation of CO2 to dimethyl ether (DME) over hybrid catalysts containing CuO/ZrO2 as a metallic function and heteropolyacids as an acidic function

Investigation on binary copper-based catalysts used in the ethanol steam reforming process

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Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis

Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis