A new microcalorimeter of adsorption for the determination of differential enthalpies

被引：23
作者：
Garcia-Cuello, V. [1 ]
Moreno-Pirajan, J. C. [1 ]
Giraldo-Gutierrez, L. [2 ]
Sapag, K. [3 ]
Zgrablich, G. [3 ]
机构：
[1] Univ Los Andes, Fac Sci, Dept Chem, Res Grp Porous Solid & Calorimetry, Bogota, Colombia
[2] Univ Nacl Colombia, Fac Sci, Dept Chem, Bogota, Colombia
[3] Univ Nacl San Luis, Fac Sci, Dept Chem, San Luis, Argentina
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2009年 / 120卷 / 03期
关键词：
Microcalorimeter; Differential heat; Adsorption; Isotherm; Zeolite; CALORIMETRY; HEAT; DESIGN; CARBON;
D O I：
10.1016/j.micromeso.2008.11.015
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
An adsorption microcalorimeter for the determination of the differential heat of adsorption is designed and built, and some of the results are presented here. For this purpose, a Calvet heat-conducting microcalorimeter is developed and is connected to a gas volumetric unit built in stainless steel to record adsorption isotherms. The microcalorimeter is electrically calibrated to establish its sensitivity and reproducibility, obtaining K = 154.34 +/- 0.23 W V-1 and, chemically, it is examined with a THAM-HCL system, obtaining Delta f= -30.49 +/- 0.05 kJ mol(-1). The adsorption microcalorimeter is used here to obtain adsorption isotherms and the corresponding differentials heats, using as reference solid, a zeolite ZSM-5 type. (C) 2008 Elsevier Inc. All rights reserved.
引用
收藏
页码：239 / 245
页数：7
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