Thermally stable ion-exchange resins as catalysts for the liquid-phase dehydration of 1-pentanol to di-n-pentyl ether (DNPE)
Thermally stable ion-exchange resins as catalysts for the liquid-phase dehydration of 1-pentanol to di-n-pentyl ether (DNPE)
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DOI：
10.1016/j.jcat.2006.07.035
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发表时间：
2006-11
影响因子：
7.3
通讯作者：
R. Bringué;M. Iborra;J. Tejero;J. Izquierdo;F. Cunill;C. Fité;V. J. Cruz
中科院分区：
文献类型：
--
作者：
R. Bringué;M. Iborra;J. Tejero;J. Izquierdo;F. Cunill;C. Fité;V. J. Cruz
在403-463 K温度范围内测定了1-戊醇液相脱水制二正戊基醚（DNPE）的转化率、选择性、产率和动力学。将Amberlyst 70的行为与Nafion树脂NR 50（一种H-β沸石）和苯乙烯-二乙烯基苯树脂的行为进行比较，所述树脂在高达423 K下稳定（即，Amberlyst 36和CT-224）。发现Amberlyst 70是最适合于该应用的催化剂，显示出最高的转化率和产率，对DNPE的选择性为93%，尽管NR 50在423-463 K下显示出最高的对醚的选择性。的动力学研究表明，源自ER机制，其中1-戊醇从液相反应与1-戊醇吸附在一个单一的中心，得到醚吸附在一个单一的网站上的模型表示每个催化剂上的数据。计算出所有催化剂的活化能在110-120 kJ/mol范围内。
Conversion, selectivity, yield, and kinetics of the liquid-phase dehydration of 1-pentanol to di-n-pentyl ether (DNPE) were determined at 403–463 K on a recently developed sulfonated resin, Amberlyst 70, which is thermally stable up to 473 K. The behavior of Amberlyst 70 was compared with that of Nafion resin NR50, an H-Beta zeolite, and styrene-divinylbenzene resins stable up to 423 K (i.e., Amberlyst 36 and CT-224). Amberlyst 70 was found to be the most suitable catalyst for this application, showing the highest conversion and yield, with a selectivity to DNPE⩾93%, despite the fact that NR50 showed the highest selectivity to ether at 423–463 K. The kinetic study reveals that a model stemming from an ER mechanism in which 1-pentanol from the liquid phase reacts with 1-pentanol adsorbed on a single center to give ether adsorbed on a single site represents data on each catalyst. The activation energy was computed to be in the range 110–120 kJ/mol on all the catalysts.