Copper-based catalysts over A520-MOF derived aluminum spinels for hydrogen production by methanol steam reforming: The role of spinal support on the performance. (21st August 2020)

• Record Type: Journal Article
• Authors: Kamyar, Niloofar; Khani, Yasin; Amini, Mostafa M.; Bahadoran, Farzad; Safari, Nasser
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 41(2020)
• Page Start: 21341
• Page End: 21353
• Publication Date: 2020-08-21
• Subjects: Methanol -- Steam reforming -- Spinel -- A520 MOF -- Hydrogen; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.05.184
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Spinel materials can be appropriate candidates for supporting the catalysis domain because of several properties, such as high thermal stability and porous structure. In this work, MAl2 O4 spinels (M: Ni, Co, Zn, and Mg) are prepared using commercial A520 (Al-MOF) and M(NO3 )2 ·6H2 O (M: Ni, Co, Zn, and Mg) at 750 °C. The prepared spinels are applied to support Cu active metal in the methanol steam-reforming (MSR) reaction. The fabricated catalysts are characterized comprehensively by X-ray powder diffraction (XRD), energy-dispersive X-ray analysis (EDX), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), temperature-programmed reduction (H2 -TPR), temperature-programmed desorption (NH3 -TPD), and BET surface area analysis (SBET ). An extensive study of the MSR process using microstructure monolith/MAl2 O4 /Cu catalysts is accomplished in the range of 150–300 °C. High methanol conversion, good H2 selectivity, and lower CO selectivity are obtained for Cu/MgAl2 O4 among all prepared catalysts. The TEM micrograph for Cu/MgAl2 O4 demonstrates platelet morphology at an average size of ~50 nm. Based on thermal analysis, the amount of coke deposited on four spent catalysts after 30 h on stream at 200 °C is less than 1%. Graphical abstract: Methanol steam reforming reaction was investigated using copper metal supported on A520 MOF derived aluminum spinels. Image 1 Highlights: The spinels applied as supports in the MSR process on the monolithic reactor. The aluminum spinels applied as supports in the MSR process on the monolithic reactor. Cu/MgAl2 O4 showed best selectivity in the MSR process among prepared spinals. The CO selectivity increased with enhancement of the acidic nature of the support. The catalysts exhibited insignificant coke formation in the MSR process.