The influences of adding sodium to zirconia on the acid-base properties of the surface and on the catalytic conversion of ethanol and acetone were investigated. The rates of ethanol dehydration, dehydrogenation and co...The influences of adding sodium to zirconia on the acid-base properties of the surface and on the catalytic conversion of ethanol and acetone were investigated. The rates of ethanol dehydration, dehydrogenation and coupling were evaluated in a fixed-bed flow reactor operating at temperatures from 613 to 673 K. The rate of acetone condensation was evaluated in the same reactor operating at 473-573 K. Addition of 1.0 wt% Na to ZrO2 decreased the rate of ethanol dehydration by more than an order of magnitude, which was consistent with a neutralization of acid sites evaluated by ammonia adsorption microcalorimetry. Addition of 1.0 wt% Na to ZrO2 also increased the base site density quantified by carbon dioxide adsorption microcalorimetry and the rate of acetone condensation. Although the rate of ethanol coupling was not increased by the addition of Na, the overall selectivity of ethanol to butanol was improved over the 1.0 wt% Na/ZrO2 sample because of the significant inhibition of ethanol dehydration.展开更多
以Guerbet十六醇为原料,通过与顺丁烯二酸酐进行酯化反应再与亚硫酸钠发生磺化反应,制备了Guerbet十六醇磺基琥珀酸单酯二钠盐(HDSS),采用FTIR和1HNMR对其结构进行表征,并对其性能进行考察。HDSS的γcmc为27.7 m N/m,3.0 g/L的HDSS溶液...以Guerbet十六醇为原料,通过与顺丁烯二酸酐进行酯化反应再与亚硫酸钠发生磺化反应,制备了Guerbet十六醇磺基琥珀酸单酯二钠盐(HDSS),采用FTIR和1HNMR对其结构进行表征,并对其性能进行考察。HDSS的γcmc为27.7 m N/m,3.0 g/L的HDSS溶液中帆布润湿时间为10 s,2.0 g/L的HDSS溶液在0.5和30 min时的泡沫体积分别为445和235 m L。上述结果表明HDSS具有优良的表面活性、润湿性和泡沫性能。展开更多
基金the Chemical Sciences,Geosciences and Biosciences Division,Office of Basic Energy Sciences,Office of Science,U.S.Department of Energy,grant no.DEFG0295ER14549
文摘The influences of adding sodium to zirconia on the acid-base properties of the surface and on the catalytic conversion of ethanol and acetone were investigated. The rates of ethanol dehydration, dehydrogenation and coupling were evaluated in a fixed-bed flow reactor operating at temperatures from 613 to 673 K. The rate of acetone condensation was evaluated in the same reactor operating at 473-573 K. Addition of 1.0 wt% Na to ZrO2 decreased the rate of ethanol dehydration by more than an order of magnitude, which was consistent with a neutralization of acid sites evaluated by ammonia adsorption microcalorimetry. Addition of 1.0 wt% Na to ZrO2 also increased the base site density quantified by carbon dioxide adsorption microcalorimetry and the rate of acetone condensation. Although the rate of ethanol coupling was not increased by the addition of Na, the overall selectivity of ethanol to butanol was improved over the 1.0 wt% Na/ZrO2 sample because of the significant inhibition of ethanol dehydration.
文摘以Guerbet十六醇为原料,通过与顺丁烯二酸酐进行酯化反应再与亚硫酸钠发生磺化反应,制备了Guerbet十六醇磺基琥珀酸单酯二钠盐(HDSS),采用FTIR和1HNMR对其结构进行表征,并对其性能进行考察。HDSS的γcmc为27.7 m N/m,3.0 g/L的HDSS溶液中帆布润湿时间为10 s,2.0 g/L的HDSS溶液在0.5和30 min时的泡沫体积分别为445和235 m L。上述结果表明HDSS具有优良的表面活性、润湿性和泡沫性能。
