CaO is a promising material as an alternative CO 2 capture material which can be used at high temperature. However, CaO sinters to form large particles under long-term high temperature conditions, resulting in a rapid decrease of its surface area and the capacity of CO 2 capture. Incorporating CaO into inert materials is a promising strategy to enhance the performance of CO 2 capture. This work investigated a novel composite material called mesocellular siliceous foam (MCF)-supported CaO to enhance the stability and capacity of CaO-based materials for CO 2 capture. The crystal structure, surface morphology and porosity property of the developed composite materials were investigated. Thermogravimetric measurements were carried out to study the cyclic CO 2 capture performance of the MCF-supported CaO composites. The results showed that a part of CaO reacted with the silica wall, and the formation of Ca 2 SiO 4 within the MCF framework limited the presence of CaO in the mesopores, thus inhibited the sintering of CaO. The sample of MCF-3CaO exhibited a better performance of CO 2 capture and long-term stability, compared with the materials prepared with lower CaO loading. This work contributes to the development of high temperature CO 2 capture adsorbents, which can be applied for decarbonizing major industrials e.g. power plant.
- CO capture
- Mesocellular siliceous foam
ASJC Scopus subject areas
- Control and Systems Engineering
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
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Student thesis: Doctoral Thesis › Doctor of PhilosophyFile