Work

Efficient utilization of vermiculite modified waste liquid: Hydrotalcite-derived catalyst for methane dry reforming and its mechanism

Year: 2025

Type: article

Abstract: Dry reforming of methane (DRM) is an effective method for carbon capture, as it simultaneously utilizes atmospheric methane and carbon dioxide to convert these gases into high-value syngas. Vermiculite-based hydrotalcite-derived Co(Fe,Cu)/Ni catalysts were prepared using a vermiculite-modified waste fluid modulation technique and employed in the DRM reaction. The Co/Ni-VMT-LDO catalyst demonstrated excellent activity and stability during the DRM stability test conducted at a temperature of 750 °C and an air velocity of 60,000 mL/(g⸱h). Over the 24-h test, CO 2 conversion stabilized at 81 %, while CH 4 conversion stabilized at 71 %. The catalyst was characterized using XRD, H 2 -TPR, N 2 -sorption desorption, and TEM techniques. The results indicate that Co/Ni-VMT-LDO exhibits high catalytic activity and stability, which can be attributed to the homogeneous composition of the Ni–Co alloy, appropriate particle size, strong metal-carrier interaction, and the presence of Mg(Ni,Al)O as a carrier. These factors contribute to the catalyst's resistance to carbon deposition and sintering. Furthermore, in situ DRIFTS characterization revealed that surface-adsorbed O∗ species can bind to CH X , thereby reducing carbon accumulation on the catalyst surface. The elimination of carbon buildup is crucial for the efficiency of the DRM reaction.

Source: International Journal of Hydrogen Energy

DOI: 10.1016/j.ijhydene.2025.151584

Authors: Shengwei Yuan, Qinrui Wang, Lu Yan, Zijun Wang, Feng Yu

Institution: Shihezi University

Language: English

Topic: Catalysts for Methane Reforming

Subfield: Catalysis

Field: Chemical Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Climate action, Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $3,730