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Application of engineered natural ores to intermediate- and high-temperature CO2 capture and conversion |
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| Authors: | Xiaoling Ma Hongjie Cui Zhenmin Cheng Zhiming Zhou |
| Affiliation: | 1. School of Chemical Engineering, East China University of Science and Technology, Shanghai, China
Contribution: Conceptualization (equal), Data curation (equal), ?Investigation (equal), Methodology (equal), Writing - original draft (equal);2. Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China Contribution: Conceptualization (equal), ?Investigation (equal), Methodology (equal);3. School of Chemical Engineering, East China University of Science and Technology, Shanghai, China |
| Abstract: | Integrated CO2 capture and conversion (ICCC) is a promising technology aiming at converting waste CO2 to fuels and high value-added chemicals. Herein, we described a proof-of-concept study of applying engineered natural ores (dolomite, magnesite, and limestone) to two different ICCC processes—intermediate-temperature ICCC for CH4 production (350–400°C) and high-temperature ICCC for syngas production (650–700°C). In the former process, a MgO-based CO2 sorbent prepared from dolomite and magnesite was combined with a methanation catalyst in a dual-bed configuration, whereby a CH4 yield of 7.1–7.3 mmol/g can be stably achieved per cycle over 20 consecutive ICCC cycles. In the latter process, a CaO-based sorbent derived from dolomite and limestone was coupled with a reforming catalyst also in a dual-bed mode, whereby syngas with a H2/CO ratio of 0.9–1.0 can be produced over 20 cycles. This study will expand the application of natural ores in CO2 emission reduction. |
| Keywords: | CaO-based sorbents integrated CO2 capture and conversion methane MgO-based sorbents syngas |