We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Methyl Chloride Synthesis over Metal Chlorides-Modified Mesoporous Alumina Catalyst.
- Authors
Ji, Yuwen; Zhang, Feilong; Yu, Feng; Zhang, Jianshu; Zhang, Jinli
- Abstract
Mesoporous alumina has been successfully prepared using sucrose as templates. Mesoporous alumina-based catalysts, neat and impregnated with metal chlorides, were tested for gas phase methyl chloride synthesis from methanol and HCl. The catalysts were characterized with Transmission electron microscope (TEM), N2-physisorption, X-ray diffraction (XRD), Fourier Transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) to identify the relationship between the catalyst characteristics and their activity and selectivity. Experimental studies revealed that the alumina acidity decreases with increasing calcination temperature, and the catalytic activity is strongly related to the acidity. The catalytic activity of mesoporous alumina (named as Al2O3-500 °C) is higher than that of the commercial alumina under the same experimental conditions. The metal chlorides-modified alumina has more Lewis acid sites than the neat alumina. Impregnation by alcohol is more effective for increasing the amount of Lewis acid sites than impregnation by water. The total Lewis acid concentration of the modified alumina decreases in the following order: ZnCl2/Al2O3-E > ZnCl2/Al2O3-W > FeCl3/Al2O3-E > FeCl3/Al2O3-W, Where E andWrespectively indicate that the catalyst impregnation solution is ethanol and water, which agrees well with the catalytic performance order. The effect of ethanol as a solvent in the impregnation could be due to the inhibition of the hydrolysis of metal chloride. The catalyst delivered a stable performance during a 100 h test that was significantly higher than that of commercial alumina.
- Subjects
METHYL chloride; METAL chlorides; ALUMINUM catalysts
- Publication
Catalysts (2073-4344), 2018, Vol 8, Issue 3, p99
- ISSN
2073-4344
- Publication type
Article
- DOI
10.3390/catal8030099