Chemisorption of H2O and CO2 on hydrotalcites for sorptionenhanced water-gas-shift processes

K.T. Coenen, F. Gallucci, P. Cobden, E. van Dijk, E.J.M. Hensen, M. van Sint Annaland

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

Thermogravimetric analysis and breakthrough experiments in a packed bed reactor were used to validate a developed adsorption model to describe the cyclic working capacity of CO¬2 and H2O on a potassium-promoted hydrotalcite, a very promising adsorbent for sorption-enhanced water-gas-shift applications. Four different adsorption sites (two sites for CO2, one site for H2O and one equilibrium site for both species) were required to describe the mass changes observed in the TGA experiments. The TGA experiments were carried out at operating temperatures between 300 and 500 °C, while the total pressure in the reactor was kept at atmospheric pressure. Cyclic working capacities for different sites and the influence of the operating conditions on the cyclic working capacity were studied using the developed model. A higher operating temperature leads to a significant increase in the cyclic working capacity of the sorbent for CO2 attributed to the increase in the desorption kinetics for CO2. The model was successfully validated with experiments in a packed bed reactor at different operating temperatures.

Original languageEnglish
Title of host publication13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 14-18 November 2016, Lausanne, Switzerland
Publication statusPublished - 17 Oct 2016

Fingerprint

Water gas shift
Chemisorption
Packed beds
Experiments
Adsorption
Sorbents
Temperature
Adsorbents
Atmospheric pressure
Potassium
Thermogravimetric analysis
Sorption
Desorption
Kinetics

Keywords

  • Hydrotalcite
  • CO2 capture
  • model for cyclic working capacity

Cite this

Coenen, K. T., Gallucci, F., Cobden, P., van Dijk, E., Hensen, E. J. M., & van Sint Annaland, M. (2016). Chemisorption of H2O and CO2 on hydrotalcites for sorptionenhanced water-gas-shift processes. In 13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 14-18 November 2016, Lausanne, Switzerland
Coenen, K.T. ; Gallucci, F. ; Cobden, P. ; van Dijk, E. ; Hensen, E.J.M. ; van Sint Annaland, M. / Chemisorption of H2O and CO2 on hydrotalcites for sorptionenhanced water-gas-shift processes. 13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 14-18 November 2016, Lausanne, Switzerland. 2016.
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Coenen, KT, Gallucci, F, Cobden, P, van Dijk, E, Hensen, EJM & van Sint Annaland, M 2016, Chemisorption of H2O and CO2 on hydrotalcites for sorptionenhanced water-gas-shift processes. in 13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 14-18 November 2016, Lausanne, Switzerland.

Chemisorption of H2O and CO2 on hydrotalcites for sorptionenhanced water-gas-shift processes. / Coenen, K.T.; Gallucci, F.; Cobden, P.; van Dijk, E.; Hensen, E.J.M.; van Sint Annaland, M.

13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 14-18 November 2016, Lausanne, Switzerland. 2016.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

TY - GEN

T1 - Chemisorption of H2O and CO2 on hydrotalcites for sorptionenhanced water-gas-shift processes

AU - Coenen, K.T.

AU - Gallucci, F.

AU - Cobden, P.

AU - van Dijk, E.

AU - Hensen, E.J.M.

AU - van Sint Annaland, M.

PY - 2016/10/17

Y1 - 2016/10/17

N2 - Thermogravimetric analysis and breakthrough experiments in a packed bed reactor were used to validate a developed adsorption model to describe the cyclic working capacity of CO¬2 and H2O on a potassium-promoted hydrotalcite, a very promising adsorbent for sorption-enhanced water-gas-shift applications. Four different adsorption sites (two sites for CO2, one site for H2O and one equilibrium site for both species) were required to describe the mass changes observed in the TGA experiments. The TGA experiments were carried out at operating temperatures between 300 and 500 °C, while the total pressure in the reactor was kept at atmospheric pressure. Cyclic working capacities for different sites and the influence of the operating conditions on the cyclic working capacity were studied using the developed model. A higher operating temperature leads to a significant increase in the cyclic working capacity of the sorbent for CO2 attributed to the increase in the desorption kinetics for CO2. The model was successfully validated with experiments in a packed bed reactor at different operating temperatures.

AB - Thermogravimetric analysis and breakthrough experiments in a packed bed reactor were used to validate a developed adsorption model to describe the cyclic working capacity of CO¬2 and H2O on a potassium-promoted hydrotalcite, a very promising adsorbent for sorption-enhanced water-gas-shift applications. Four different adsorption sites (two sites for CO2, one site for H2O and one equilibrium site for both species) were required to describe the mass changes observed in the TGA experiments. The TGA experiments were carried out at operating temperatures between 300 and 500 °C, while the total pressure in the reactor was kept at atmospheric pressure. Cyclic working capacities for different sites and the influence of the operating conditions on the cyclic working capacity were studied using the developed model. A higher operating temperature leads to a significant increase in the cyclic working capacity of the sorbent for CO2 attributed to the increase in the desorption kinetics for CO2. The model was successfully validated with experiments in a packed bed reactor at different operating temperatures.

KW - Hydrotalcite

KW - CO2 capture

KW - model for cyclic working capacity

M3 - Conference contribution

BT - 13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 14-18 November 2016, Lausanne, Switzerland

ER -

Coenen KT, Gallucci F, Cobden P, van Dijk E, Hensen EJM, van Sint Annaland M. Chemisorption of H2O and CO2 on hydrotalcites for sorptionenhanced water-gas-shift processes. In 13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 14-18 November 2016, Lausanne, Switzerland. 2016