Thermodynamic Analyses of a Moderate-Temperature Process of Carbon Dioxide Hydrogenation to Methanol via Reverse Water–Gas Shift with In Situ Water Removal

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Resumé

CO2 hydrogenation to methanol via the reverse water gas shift (the CAMERE process) is an alternative way for methanol synthesis. High operating temperatures (600-800°C) are required for the reverse water gas shift (RWGS) process due to the thermodynamic limit. In this study, moderate temperatures (200 ‒ 300°C) were used for the RWGS part in the CAMERE process by the application of in situ water removal (ISWR). Thermodynamic analyses were conducted on this process using the Gibbs free energy minimization method. The analyses show that by using ISWR with high water removal fractions (e.g., 0.80 ‒ 0.99) the CO2 conversion of the RWGS part can be significantly improved at moderate operating temperatures. The one-step CO2 hydrogenation to methanol (CTM) with ISWR was also investigated which resulted in similar methanol yields. Both processes showed a high potential and ability to promote CO2 hydrogenation to methanol through the use of ISWR.
OriginalsprogEngelsk
TidsskriftIndustrial & Engineering Chemistry Research
Vol/bind58
Udgave nummer24
Antal sider11
ISSN0888-5885
DOI
StatusUdgivet - maj 2019

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Carbon Dioxide
Water gas shift
Hydrogenation
Methanol
Carbon dioxide
Thermodynamics
Water
Temperature
Gibbs free energy

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@article{5787a7553c8a47df8292fba5addccb57,
title = "Thermodynamic Analyses of a Moderate-Temperature Process of Carbon Dioxide Hydrogenation to Methanol via Reverse Water–Gas Shift with In Situ Water Removal",
abstract = "CO2 hydrogenation to methanol via the reverse water gas shift (the CAMERE process) is an alternative way for methanol synthesis. High operating temperatures (600-800°C) are required for the reverse water gas shift (RWGS) process due to the thermodynamic limit. In this study, moderate temperatures (200 ‒ 300°C) were used for the RWGS part in the CAMERE process by the application of in situ water removal (ISWR). Thermodynamic analyses were conducted on this process using the Gibbs free energy minimization method. The analyses show that by using ISWR with high water removal fractions (e.g., 0.80 ‒ 0.99) the CO2 conversion of the RWGS part can be significantly improved at moderate operating temperatures. The one-step CO2 hydrogenation to methanol (CTM) with ISWR was also investigated which resulted in similar methanol yields. Both processes showed a high potential and ability to promote CO2 hydrogenation to methanol through the use of ISWR.",
keywords = "Thermodynamic analysis, CAMERE process, CO2 hydrogenation, Methanol synthesis, In situ water removal, Membrane reactor, Sorption-enhanced reaction process",
author = "Xiaoti Cui and K{\ae}r, {S{\o}ren Knudsen}",
year = "2019",
month = "5",
doi = "10.1021/acs.iecr.9b01312",
language = "English",
volume = "58",
journal = "Industrial & Engineering Chemistry Research",
issn = "0888-5885",
publisher = "American Chemical Society",
number = "24",

}

TY - JOUR

T1 - Thermodynamic Analyses of a Moderate-Temperature Process of Carbon Dioxide Hydrogenation to Methanol via Reverse Water–Gas Shift with In Situ Water Removal

AU - Cui, Xiaoti

AU - Kær, Søren Knudsen

PY - 2019/5

Y1 - 2019/5

N2 - CO2 hydrogenation to methanol via the reverse water gas shift (the CAMERE process) is an alternative way for methanol synthesis. High operating temperatures (600-800°C) are required for the reverse water gas shift (RWGS) process due to the thermodynamic limit. In this study, moderate temperatures (200 ‒ 300°C) were used for the RWGS part in the CAMERE process by the application of in situ water removal (ISWR). Thermodynamic analyses were conducted on this process using the Gibbs free energy minimization method. The analyses show that by using ISWR with high water removal fractions (e.g., 0.80 ‒ 0.99) the CO2 conversion of the RWGS part can be significantly improved at moderate operating temperatures. The one-step CO2 hydrogenation to methanol (CTM) with ISWR was also investigated which resulted in similar methanol yields. Both processes showed a high potential and ability to promote CO2 hydrogenation to methanol through the use of ISWR.

AB - CO2 hydrogenation to methanol via the reverse water gas shift (the CAMERE process) is an alternative way for methanol synthesis. High operating temperatures (600-800°C) are required for the reverse water gas shift (RWGS) process due to the thermodynamic limit. In this study, moderate temperatures (200 ‒ 300°C) were used for the RWGS part in the CAMERE process by the application of in situ water removal (ISWR). Thermodynamic analyses were conducted on this process using the Gibbs free energy minimization method. The analyses show that by using ISWR with high water removal fractions (e.g., 0.80 ‒ 0.99) the CO2 conversion of the RWGS part can be significantly improved at moderate operating temperatures. The one-step CO2 hydrogenation to methanol (CTM) with ISWR was also investigated which resulted in similar methanol yields. Both processes showed a high potential and ability to promote CO2 hydrogenation to methanol through the use of ISWR.

KW - Thermodynamic analysis

KW - CAMERE process

KW - CO2 hydrogenation

KW - Methanol synthesis

KW - In situ water removal

KW - Membrane reactor

KW - Sorption-enhanced reaction process

UR - https://pubs.acs.org/articlesonrequest/AOR-eXua6CW9ZHhtTz38R8ER

U2 - 10.1021/acs.iecr.9b01312

DO - 10.1021/acs.iecr.9b01312

M3 - Journal article

VL - 58

JO - Industrial & Engineering Chemistry Research

JF - Industrial & Engineering Chemistry Research

SN - 0888-5885

IS - 24

ER -