Realization of ultramicropore characterization of activated charcoal by cryogenic helium adsorption technique

IF 5.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY Measurement Pub Date : 2025-03-09 DOI:10.1016/j.measurement.2025.117243

Cheng Chen , Zhaoxi Chen , Rui Hu , Qingxi Yang , Sihui Wang , Kexin Lin

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引用次数: 0

Abstract

In this paper, an effective experimental approach has been developed and tested to measure the adsorption characteristics of activated charcoals within the temperature range of 4.2 K-100 K. The experiment of 4.5 K helium adsorption was conducted on an activated charcoal sample and the data was analyzed by Brunauer-Emmett-Teller (BET), Dubinin-Radushkevich (DR), and Horvath-Kawazoe (HK) methods, yielding the greater BET surface area (

S_{BET}

) and micropore volume (

V_{micro}

) compared to the nitrogen adsorption isotherm at 80 K. The results show that using helium (He) as a probe can better characterize the surface characteristics of activated charcoal than nitrogen (N₂) probe, especially for ultramicropores that cannot be assessed by N₂ molecules. Consequently, we suggest the He adsorption method as a tool with great promise for reliable and detailed characterization of micropore characteristic parameters about activated charcoals. These results will be utilized to determine the adsorption performance of the adsorbent in cryosorption pumps.

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来源期刊

Measurement 工程技术-工程：综合

CiteScore

10.20

自引率

12.50%

发文量

1589

审稿时长

12.1 months

期刊介绍： Contributions are invited on novel achievements in all fields of measurement and instrumentation science and technology. Authors are encouraged to submit novel material, whose ultimate goal is an advancement in the state of the art of: measurement and metrology fundamentals, sensors, measurement instruments, measurement and estimation techniques, measurement data processing and fusion algorithms, evaluation procedures and methodologies for plants and industrial processes, performance analysis of systems, processes and algorithms, mathematical models for measurement-oriented purposes, distributed measurement systems in a connected world.