Watanabe Masaru, Iida Toru, Aizawa Yuichi, Aida Taku M, Inomata Hiroshi
Research Center of Supercritical Fluid Technology, Tohoku University, 6-6-11-403 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
Bioresour Technol. 2007 Apr;98(6):1285-90. doi: 10.1016/j.biortech.2006.05.007. Epub 2006 Jun 22.
Glycerol conversion was conducted in hot-compressed water (HCW: 573-673 K, 25-34.5 MPa) using a batch and a flow apparatus and the influences of temperature, H(2)SO(4), glycerol concentration, and pressure, were examined. The yield of acrolein was enhanced by higher glycerol and H(2)SO(4) concentration, and higher pressure. Approximately 80% selectivity of acrolein was obtained at 90% of glycerol conversion with an acid catalyst in supercritical condition (673 K and 34.5 MPa). The rate constant of acrolein decomposition was always higher than that of acrolein formation in the absence of acid catalyst but the rate constant of acrolein formation could be overcome that of acrolein decomposition by addition acid in supercritical condition.
在热压水（HCW：573 - 673 K，25 - 34.5 MPa）中，使用间歇式和流动式装置进行甘油转化，并研究了温度、硫酸、甘油浓度和压力的影响。较高的甘油和硫酸浓度以及较高的压力提高了丙烯醛的产率。在超临界条件（673 K和34.5 MPa）下，使用酸催化剂，甘油转化率为90%时，丙烯醛的选择性约为80%。在没有酸催化剂的情况下，丙烯醛分解的速率常数总是高于丙烯醛生成的速率常数，但在超临界条件下加入酸后，丙烯醛生成的速率常数可以超过丙烯醛分解的速率常数。
