CO2 capture and conversion to syngas via dry reforming of C3H8 over a Pt/ZrO2–CaO catalyst

Abstract

The integrated CO₂ capture and conversion process to syngas via dry reforming of C₃H₈ with little intensive energy swing was carried out over the bifunctional Pt/ZrO₂–CaO catalysts. The bifunctional catalyst consists of Pt as the dry reforming catalyst and ZrO₂–CaO as the CO₂ adsorbent and support. The effects of the Zr/Ca ratio in the catalysts on the integrated CO₂ capture and conversion process were studied. The results revealed that the Pt/ZrO₂–5CaO catalyst could capture 10.3 mmol CO₂ g⁻¹ and convert it to CO completely at a conversion temperature of 600 °C, and in this integrated process, 77% of C₃H₈ was reformed with CO₂, and 23% of C₃H₈ was dehydrogenated and cracked. Pt/ZrO₂–5CaO exhibited excellent stability for the integrated CO₂ capture and utilization processes even after 10 consecutive CO₂ capture and conversion cycles.