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- W2314534191 abstract "Hydroxyapatites (HAPm-T) of varying molar Ca/P ratios m (1.58–1.69) and calcination temperatures T (360–700 °C) were prepared and comprehensively characterized by nitrogen adsorption, TG, XPS, XRD, CO2-TPD, and NH3-TPD and were employed to catalyze the gas-phase dehydration of lactic acid (LA) to produce acrylic acid (AA). While the texture and crystallinity of the HAPm-T sample were affected little by variation of m, its surface acidity decreased but basicity increased with the increase in m. The HAPm-T sample with a higher T showed a higher crystallinity but lower surface area, acidity, and basicity. The conversion of LA decreased with increasing either m or T of the HAPm-T catalyst; the selectivity for AA maximized at m = 1.62 but decreased steadily with the T increase. The HAP1.62-360 sample (m = 1.62, T = 360 °C) was identified as the most efficient catalyst, offering an AA yield as high as 50–62% for longer than 8 h (AA selectivity: 71–74 mol %) under optimized reaction conditions (360 °C, WHSVLA= 1..." @default.
- W2314534191 created "2016-06-24" @default.
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- W2314534191 date "2014-05-12" @default.
- W2314534191 modified "2023-10-14" @default.
- W2314534191 title "Sustainable Production of Acrylic Acid: Catalytic Performance of Hydroxyapatites for Gas-Phase Dehydration of Lactic Acid" @default.
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- W2314534191 doi "https://doi.org/10.1021/cs500388x" @default.
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