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- W1975817750 abstract "The performance of solid catalysts and catalyst supports is generally believed to be dependent on their morphology, surface area, and architecture. In order to fully exploit their attractive properties in actual practical applications, layered zirconium phosphate materials should be fabricated into macroscopic form. Here, we report the fabrication of microscopic spheres of alpha-zirconium phosphate (alpha-ZrP) by a spray-drying process. The layered alpha-ZrP nanoparticles were originally obtained using a synthesis route involving separate nucleation and aging steps (SNAS). The resulting products are composed of nanosize alpha-ZrP particles aggregated into solid microspheres with a diameter of 5-45 microm and a sphericity of 0.80. After calcination at 573 K, surface area of 43.8 m(2)/g could be obtained for alpha-ZrP microspheres, which is larger than that of the alpha-ZrP powder after similar thermal treatment (36.2 m(2)/g). Furthermore, the number of acidic sites of the alpha-ZrP microspheres is greater than for the alpha-ZrP powder due to its unique textual properties and higher surface area. The acylation reaction of fatty acid methyl esters (methyl stearate) with ethanolamine to form monoethanolamides was chosen as a probe reaction to evaluate the catalytic activity of the resulting microspherical alpha-ZrP materials, which showed high activity compared to the sample in the form of powders, with about 92.9% methyl stearate conversion at 393 K for 12 h. The enhanced performance in the reaction is determined by the large surface area and the increased number of acidic sites in the multiple-scales porosity of alpha-ZrP microspheres." @default.
- W1975817750 created "2016-06-24" @default.
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- W1975817750 date "2010-09-01" @default.
- W1975817750 modified "2023-10-14" @default.
- W1975817750 title "Preparation of microspherical α-zirconium phosphate catalysts for conversion of fatty acid methyl esters to monoethanolamides" @default.
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- W1975817750 doi "https://doi.org/10.1016/j.jcis.2010.05.043" @default.
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