Kanuri Suresh, Singh Satyapaul A, Uttaravalli Appala Naidu, Roy Sounak, Dinda Srikanta
Department of Chemical Engineering, Birla Institute of Technology and Science (BITS) Pilani Hyderabad Campus Hyderabad Telangana-500078 India
Department of Chemical Engineering, B. V. Raju Institute of Technology Narsapur, Medak Dist. 502313 Telangana India.
RSC Adv. 2024 Mar 26;14(14):10024-10033. doi: 10.1039/d4ra01374c. eCollection 2024 Mar 20.
Morphologically modified composite CuO-ZnO-CeO catalysts were synthesized using a single-step hydrothermal technique. The study highlights the influence of solvent on the structural and physico-chemical properties of the catalysts. Various techniques, such as XRD, FE-SEM, BET, XPS, and H-TPR, were used to analyze the catalyst properties. Among the synthesized materials, the catalyst, prepared with a ,-dimethyl formamide (DMF)-to-metal nitrates ratio of 20 (named as CZC-1), showed enhanced active sites in the form of surface features such as nanowire-like morphology, large surface area, low crystallite size, increased oxygen vacancies, and high CuO dispersion. A bench-scale fixed-bed flow reactor was used to examine the catalytic performance of the catalysts. At 225 °C reactor temperature, 30 bar reactor pressure, and with a space velocity of 6000 cm g h, the CZC-1 catalyst showed 13.6% CO conversion and 74.1% methanol selectivity. diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) analysis confirmed the carbonate-formate-methoxy reaction pathway for methanol formation using the CZC-1 catalyst.
采用一步水热法合成了形态改性的复合CuO-ZnO-CeO催化剂。该研究突出了溶剂对催化剂结构和物理化学性质的影响。使用了各种技术，如XRD、FE-SEM、BET、XPS和H-TPR来分析催化剂性能。在合成的材料中，以N，N-二甲基甲酰胺（DMF）与金属硝酸盐的比例为20制备的催化剂（命名为CZC-1），呈现出增强的活性位点，其表面特征如纳米线状形态、大表面积、低微晶尺寸、增加的氧空位和高CuO分散度。使用台式固定床流动反应器来考察催化剂的催化性能。在反应器温度为225℃、反应器压力为30 bar且空速为6000 cm³ g⁻¹ h⁻¹的条件下，CZC-1催化剂表现出13.6%的CO转化率和74.1%的甲醇选择性。漫反射红外傅里叶变换光谱（DRIFTS）分析证实了使用CZC-1催化剂生成甲醇的碳酸酯-甲酸盐-甲氧基反应途径。
