Pressure Dependence of the Low Temperature Carbonation Kinetics of Calcium Oxide for Potential Thermochemical Energy Storage Purposes and Sustainable CO 2  Fixation | Zendy

Gravogl Georg | Zendy; Birkelbach Felix | Zendy; Müller Danny | Zendy; Lengauer Christian L. | Zendy; Weinberger Peter | Zendy; Miletich Ronald | Zendy

Premium

Pressure Dependence of the Low Temperature Carbonation Kinetics of Calcium Oxide for Potential Thermochemical Energy Storage Purposes and Sustainable CO 2 Fixation

Author(s) -

Gravogl Georg,

Birkelbach Felix,

Müller Danny,

Lengauer Christian L.,

Weinberger Peter,

Miletich Ronald

Publication year - 2021

Publication title -

advanced sustainable systems

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.499

H-Index - 24

ISSN - 2366-7486

DOI - 10.1002/adsu.202100022

Subject(s) - carbonation , hydrothermal circulation , reaction rate , chemical engineering , activation energy , chemistry , kinetics , calcium oxide , carbon capture and storage (timeline) , oxide , chemical kinetics , mineralogy , materials science , catalysis , metallurgy , geology , biochemistry , physics , oceanography , quantum mechanics , climate change , engineering

The pressure effect on the carbonation behavior of CaO as model compound is studied under mild hydrothermal conditions, as relevant to sustainable geological CO 2 sequestration and for potential utilization in thermochemical energy storage. Reaction yields are determined experimentally by means of in situ powder X‐ray diffraction using CaO powder samples in a controlled reaction with CO 2 under gas pressures between 1.0 and 5.0 MPa and at temperatures between 298 and 373 K. The results show a two‐step conversion of CaO to CaCO 3 , involving Ca(OH) 2 as a reactive intermediate, with differing influences of the microstructures on the individual reaction sub‐steps. A kinetic evaluation of the experimental data delivers a high rate‐enhancing effect of temperature on the hydration reaction, whereas the CaCO 3 formation is strongly dependent on the available CO 2 gas pressure. With this systematic investigation the optimal pressure and temperature conditions for this reaction system can be determined delivering a contribution to a sustainable climate and energy management.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research