Fe-Ni-Ce-Zr-modified CuO-ZnO catalyst for methanol steam reforming

Four copper-based catalysts were prepared by co-precipitation method. The catalysts were characterized by scanning electron microscopy, N-2 adsorption-desorption, temperature programmed reduction process (H-2-TPR), X-ray diffraction (XRD) and in-situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) to explore the effects of different components on catalyst activity. The performance of different catalysts for hydrogen production via methanol steam reforming was evaluated on a fixed-bed reactor. The effects of different components, reaction temperature and gas hourly space velocity (GHSV) on the catalytic performance were investigated. The results exhibited that among the investigated catalysts, 1# and 2# catalysts had the higher catalytic activity and stability. Under the conditions of 280 degrees C, a molar ratio of methanol to water of 1:1.3, and a GHSV of 13.3 L/(g.h), the methanol conversion rate reached 99.9%, the CO concentration was as low as 0.29%, and the selectivity was only 1.16%. The H-2 production flow rate per unit mass of catalyst was 270 mL/(min.g). After 60 h of start-stop experiments, the methanol conversion rate remained above 98.4%, the CO concentration was always lower than 0.5%, and the start-up speed was significantly faster than that of the commercial catalyst M650. This study provided an effective method for the preparation of catalysts for methanol steam reforming.

Automated summary

Four copper-based catalysts were prepared and characterized to investigate the effects of different components on catalyst activity. The performance of these catalysts for methanol steam reforming was evaluated, and the factors such as components, reaction temperature, and gas hourly space velocity were studied. The results showed that 1# and 2# catalysts exhibited higher catalytic activity and stability, achieving high methanol conversion rate and selectivity, as well as faster hydrogen production speed. This study provided an effective method for the preparation of catalysts for methanol steam reforming.