Introduction of ICCU-DRM

Integrated CO₂ capture and utilisation for syngas production using methane as the reducing agent is promising, as methane is also a greenhouse gas. In addition, it is cheaper than H₂ reduction agent.

The following content of ICCU-DRM introduction is from this reference (https://doi.org/10.1016/j.ccst.2022.100052).

“The ICCC-DRM process always starts from a CO₂ capture stage by the CO₂ sorption sites, which is followed by an isothermal conversion stage by the catalytic sites, when the absorbed CO₂ spillovers to the catalytic sites and reacts with the CH₄. The ICCC-DRM process has been proved to be much more cost-effective than the separated CO₂ capture and DRM process due to the avoided CO₂ capture, compress, and transportation processes. However, the effect of process parameters such as temperature, contaminant gases, and CO₂ concentration on the ICCC-DRM performance should be well investigated before industrial application. Table 4 lists some of the typical ICCC-DR systems and summarizes the effects of the reaction parameters on the CO₂ capture and in-situ DR reaction performance.”

“Considering the fact that the DRM process occurs spontaneously (ΔrG<0) when the reaction temperature is above 630 °C, Tian et al. (Tian et al., 2019) (10.1126/sciadv.aav5077) put forward and demonstrated the integrated CO₂ capture and conversion using Ni-CaO bifunctional catalyst, i.e., ICCC-DRM process, and reported that the energy consumption of the ICCC-DRM process was 22% lower than that of conventional CH₄ dry reforming for CO₂ utilization (calculated by Gibbs free energy, enthalpy, and thermodynamic equilibrium), which means that the ICCC-DRM concept for CO₂ utilization was a promising option to recycle CO₂ from flue gases into high-valuable hydrocarbons.”