Methanol Synthesis from CO2 Hydrogenation with a Cu/Zn/Al/Zr Fibrous Catalyst

An, Xin; Zuo, Yani; Zhang, Qiang; Wang, Jinfu

doi:10.1016/s1004-9541(09)60038-0

Cited by 104 publications

(46 citation statements)

References 25 publications

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“…The negative effect of recycle is due to the decreasing of kinetic. At fixed number of tubes, recycle has a negative effect: with a higher flow rate, superficial velocity increases and kinetic decreases producing a lower methanol [33]. Manenti et al [34] suggest that conversion increases when the inlet flowrate is lowered, thanks to the increase in residence time.…”

Section: Results Of Anova Analysismentioning

confidence: 99%

Methanol Synthesis: Optimal Solution for a Better Efficiency of the Process

Leonzio

2018

Processes

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Abstract:In this research, an ANOVA analysis and a response surface methodology are applied to analyze the equilibrium of methanol reaction from pure carbon dioxide and hydrogen. In the ANOVA analysis, carbon monoxide composition in the feed, reaction temperature, recycle and water removal through a zeolite membrane are the analyzed factors. Carbon conversion, methanol yield, methanol productivity and methanol selectivity are the analyzed responses. Results show that main factors have the same effect on responses and a common significant interaction is not present. Carbon monoxide composition and water removal have a positive effect, while temperature and recycle have a negative effect on the system. From central composite design, an optimal solution is found in order to overcome thermodynamic limit: the reactor works with a membrane at lower temperature with carbon monoxide composition in the feed equal to 10 mol % and without recycle. In these conditions, carbon conversion, methanol yield, methanol selectivity, and methanol production are, respectively, higher than 60%, higher than 60%, between 90% and 95% and higher than 0.15 mol/h when considering a feed flow rate of 1 mol/h. A comparison with a traditional reactor is also developed: the membrane reactor ensures to have a carbon conversion higher of the 29% and a methanol yield higher of the 34%. Future researches should evaluate an economic analysis about the optimal solution.

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Section: Results Of Anova Analysismentioning

confidence: 99%

Methanol Synthesis: Optimal Solution for a Better Efficiency of the Process

Leonzio

2018

Processes

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“…It is well-established that both CO and CO2 can be hydrogenated to methanol. More recently it has been claimed that CO2 is the dominant carbon provider to the methanol molecule 14 and the conversion occurs either through the formate or the hydrocarboxyl routes 10,15 in existence of a competing reaction: reverse-water-gasshift-reaction (RWGS) producing CO and water under the same conditions 16,17 . Both the reaction routes (formate or hydrocarboxyl) of CO2 hydrogenation yield water as a product and large amount of accumulated H2O affects the CO2 hydrogenation reaction.…”

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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“…Many kinetic models [27] and many mechanisms have been proposed [28]. Among these models, the model of Graaf [20] was selected for use in this work, as this has been rated very favorably [29,30].…”

Section: Xrd Datamentioning

confidence: 99%

“…2, 3 and 4. These were determined by the thermodynamic model proposed by Wang [30]. According to our calculation, Eqs.…”

Section: Xrd Datamentioning

confidence: 99%

Copper crystallite size and methanol synthesis catalytic property of Cu-based catalysts promoted by Al, Zr and Mn

Wang

Zuo

Han

et al. 2010

Reac Kinet Mech Cat

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Five Cu-based catalysts with different promoters (Al, Zr and Mn) were prepared by uniform coprecipitation and evaluated in a laboratory fixed bed reactor for methanol synthesis at 463-513 K and a pressure of 4 MPa. These catalysts were characterized by X-ray diffraction (XRD) and the data showed that they had similar crystal phase and copper crystallite sizes. The most active catalyst comprised fibrous particles with a ring structure. Zirconium, aluminum and manganese additives caused no evident change in the main active phase of the catalysts but gave rise to different copper crystallite sizes. The different Cu 0 crystallite sizes resulted in different amounts of active sites, but the activation energies of methanol synthesis on these catalysts were all about 104 kJ/mol and turnover frequencies (TOFs) were about the same values, indicating the close relationship between methanol productivity and microstructure of Cu-based catalyst.

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Methanol Synthesis from CO2 Hydrogenation with a Cu/Zn/Al/Zr Fibrous Catalyst

Cited by 104 publications

References 25 publications

Methanol Synthesis: Optimal Solution for a Better Efficiency of the Process

Methanol Synthesis: Optimal Solution for a Better Efficiency of the Process

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

Copper crystallite size and methanol synthesis catalytic property of Cu-based catalysts promoted by Al, Zr and Mn

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