Policicchio Alfonso, Maccallini Enrico, Kalantzopoulos Georgios N, Cataldi Ugo, Abate Salvatore, Desiderio Giovanni, Agostino Raffaele Giuseppe
Dipartimento di Fisica, Università della Calabria, Via Ponte P. Bucci, Cubo 31C, 87036 Arcavacata di Rende (CS), Italy.
Rev Sci Instrum. 2013 Oct;84(10):103907. doi: 10.1063/1.4824485.
The development of a volumetric apparatus (also known as a Sieverts' apparatus) for accurate and reliable hydrogen adsorption measurement is shown. The instrument minimizes the sources of systematic errors which are mainly due to inner volume calibration, stability and uniformity of the temperatures, precise evaluation of the skeletal volume of the measured samples, and thermodynamical properties of the gas species. A series of hardware and software solutions were designed and introduced in the apparatus, which we will indicate as f-PcT, in order to deal with these aspects. The results are represented in terms of an accurate evaluation of the equilibrium and dynamical characteristics of the molecular hydrogen adsorption on two well-known porous media. The contribution of each experimental solution to the error propagation of the adsorbed moles is assessed. The developed volumetric apparatus for gas storage capacity measurements allows an accurate evaluation over a 4 order-of-magnitude pressure range (from 1 kPa to 8 MPa) and in temperatures ranging between 77 K and 470 K. The acquired results are in good agreement with the values reported in the literature.
展示了一种用于精确可靠地测量氢吸附量的容量分析仪器（也称为西韦茨仪器）的研制情况。该仪器将主要由内部体积校准、温度稳定性和均匀性、被测样品骨架体积的精确评估以及气体种类的热力学性质等因素导致的系统误差源降至最低。为了处理这些方面的问题，在该仪器中设计并引入了一系列硬件和软件解决方案，我们将其称为f-PcT。结果以对两种知名多孔介质上分子氢吸附的平衡和动力学特性的精确评估来呈现。评估了每种实验解决方案对吸附摩尔数误差传播的贡献。所研制的用于测量储气容量的容量分析仪器能够在4个数量级的压力范围（从1 kPa到8 MPa）以及77 K至470 K的温度范围内进行精确评估。所获得的结果与文献报道的值高度吻合。
