European inter-laboratory comparison of high pressure CO2 sorption isotherms. I: Activated carbon
European inter-laboratory comparison of high pressure CO2 sorption isotherms. I: Activated carbon
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DOI：
10.1016/j.carbon.2009.06.046
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发表时间：
2009-11-01
期刊：
影响因子：
10.9
通讯作者：
Wolf, K. -H. A. A.
中科院分区：
文献类型：
--
作者：
Gensterblum, Y.;van Hemert, P.;Wolf, K. -H. A. A.
为了评估和改进二氧化碳（CO2）在煤上的高压吸附等温线的质量，在四个欧洲研究实验室之间进行了一项实验室间研究（“循环赛”）。在第一轮测量中，在318 K下，使用测压法（TU德尔夫特和RWTH亚琛大学）和重量法（FP Mons和INERIS）在高达16 MPa下测定Filtrasorb 400（F400）活性炭上的过量吸附等温线。研究表明，在超临界范围内的CO2吸附可以准确地确定与重量和测压设备，但需要彻底优化的仪器和测量以及适当的样品制备程序。对于我们用作基准的活性炭F400的表征，我们已经确定表面积为1063 m2 g-1，Dubininin-Radushkevich（DR）吸附体积为0.51 cm-3 g-1。此外，我们分析了元素的近表面组成的能量色散X射线光谱（EDX）。为了确定F400活性炭的本体组成，进行了工业分析和元素分析，在5 MPa附近观察到的过量吸附最大值在8.0molkg（-1）附近，这一直高于文献数据（最高达0.8molkg（-1））。(C)2009爱思唯尔有限公司版权所有。
In order to assess and improve the quality of high-pressure sorption isotherms of carbon dioxide (CO2) on coals, an inter-laboratory study ("Round Robin") has been conducted among four European research laboratories. in a first round of measurements, excess sorption isotherms were determined on Filtrasorb 400 (F400) activated carbon at 318 K using the manometric (TU Delft and RWTH Aachen University) and the gravimetric (FP Mons and INERIS) method up to 16 MPa. The study shows that CO2 sorption in the supercritical range can be determined accurately with both gravimetric and manometric equipment but requires thorough optimization of instrumentation and measuring as well as proper sample preparation procedures. For the characterization of the activated carbon F400, which we used as benchmark, we have determined a surface area of 1063 m(2) g(-1), and Dubinin-Radushkevich (DR) micropore volume of 0.51 cm(3) g(-1). Additionally, we analysed the elementary near-surface composition by energy dispersive X-ray spectroscopy (EDX). To characterise the bulk composition of the F400 activated carbon, a proximate and ultimate analysis was performed.The observed excess sorption maxima around 5 MPa have values around 8.0 mol kg(-1), which are consistently higher (by upto 0.8 mol kg(-1)) than literature data. (C) 2009 Elsevier Ltd. All rights reserved.