On chemical equilibria in methanol synthesis

Graaf, G.H.; Sijtsema, P.J.J.M.; Stamhuis, Eize; Joosten, G.E.H.

doi:10.1016/0009-2509(90)87020-s

Cited by 63 publications

(52 citation statements)

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“…In this work, the rate expressions have been selected from Graaf et al [36]. The rate equations combined with the A comparison of hydrogen and methanol production M. R. Rahimpour and E. Pourazadi equilibrium rate constants [37] provide enough information about kinetics of methanol synthesis. The corresponding rate expressions due to the hydrogenation of CO, CO 2 and reverse water-gas shift reactions over commercial CuO/ZnO/Al 2 O 3 catalysts are:…”

Section: Methanol Synthesismentioning

confidence: 99%

A comparison of hydrogen and methanol production in a thermally coupled membrane reactor for co-current and counter-current flows

Rahimpour

Pourazadi

2010

Int. J. Energy Res.

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SUMMARYThis work considers three concentric tube reactors to prepare pure hydrogen, especially applicable in fuel cell technologies, with zero CO 2 emission. Hydrogen and methanol production rates are compared in a thermally coupled exothermic and endothermic reactor for co-current and counter-current modes. Synthesis of methanol is coupled with dehydrogenation of cyclohexane as a high content hydrogen carrier (7.1 wt%). The efficient coupling of exothermic and endothermic reactions increases the profitability of operation of the reactor, reduces the size of reactor and decreases the operational and capital costs. By inserting a hydrogen-perm selective membrane into the reactor configuration, hydrogen can permeate selectively into the membrane, and hence, the third tube receives hydrogen. The simulation results are compared with the corresponded results for an industrial methanol fixed-bed reactor, which operates under the same feed conditions. The influence of some operating variables is investigated on methanol and hydrogen yields during the performance of reactor. The results show higher methanol conversion, as the same as conventional reactor, and hydrogen for co-current flow.

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Section: Methanol Synthesismentioning

confidence: 99%

A comparison of hydrogen and methanol production in a thermally coupled membrane reactor for co-current and counter-current flows

Rahimpour

Pourazadi

2010

Int. J. Energy Res.

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“…Chemical equilibria during the methanol synthesis are calculated using the equilibrium constants presented by Graaf et al [7]. Nonideality of the gas mixture is taken into account by including the fugacity coefficients in the equilibrium constants, see equation (6) and (7) where K is the equilibrium constant, T the temperature (K), the fugacity coefficient, y the gas phase mole fraction and P the pressure (bar).…”

Section: Methanol Synthesismentioning

confidence: 99%

A novel condensation reactor for efficient CO2 to methanol conversion for storage of renewable electric energy

Bos

Brilman

2015

Chemical Engineering Journal

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A novel reactor design for the conversion of CO 2 and H 2 to methanol is developed. The conversion limitations because of thermodynamic equilibrium are bypassed via in situ condensation of a water/methanol mixture. Two temperatures zones inside the reactor ensure optimal catalyst activity (high temperature) and full conversion by condensation at a lower temperature in a separate zone. Due to this full gas conversion there is no need for an external recycle of reactants. Experimental work confirmed full carbon conversion (>99.5%) and high methanol selectivity (>99.5% on carbon basis). Additionally, it was shown that due the temperature gradient inside the reactor significant reaction rates are achieved under natural convection conditions.

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“…The developing model is fitted with the CO and H2 conversion obtaining from laboratory in temperature above 200 ºC; however, it is widely differed under 200 ºC (140 -200 ºC). This result can be explained that the developing model is out of the minimum range which the previous work [5,12,13] used (130 -300 ºC). The optimum conversion of CO and H2 is temperature at 200 ºC acquired from the developing simulation agreed with the laboratory.…”

Section: Methanol Synthesis Reactionmentioning

confidence: 78%

Kinetic modeling and simulation of bio-methanol process from biogas by using aspen plus

et al. 2018

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Abstract.A process of bio-methanol from biogas was studied by modifying kinetic model of reaction's Richardson and Paripatyadar comparing with laboratory data. Bio-methanol process consists of 2 steps: reforming reaction (at atmospheric pressure, temperature 500 -750 o C) and methanol synthesis (at constant pressure 40 bar, temperature 140 -280 o C). The reaction model of each step was individual simulated. Next both steps were integrated, then they were simulated using ASPEN PLUS software. This work investigated the optimum operating condition and predicted result of both reactions. The developing model was obtained, then it was applied for ten thousand liters per day of methanol. The simulation result received from reforming reaction showed increasing temperature effect to rising in CH4 and CO2 conversion and relating with laboratory result. The optimum condition of methanol synthesis is temperature 200 o C under constant pressure 40 bar.

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On chemical equilibria in methanol synthesis

Cited by 63 publications

References 1 publication

A comparison of hydrogen and methanol production in a thermally coupled membrane reactor for co-current and counter-current flows

A comparison of hydrogen and methanol production in a thermally coupled membrane reactor for co-current and counter-current flows

A novel condensation reactor for efficient CO2 to methanol conversion for storage of renewable electric energy

Kinetic modeling and simulation of bio-methanol process from biogas by using aspen plus

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