ISSN: 0304-128X ISSN: 2233-9558
Copyright © 2024 KICHE. All rights reserved

Articles & Issues

Conflict of Interest
In relation to this article, we declare that there is no conflict of interest.
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.

All issues

CuHY 및 CuNaY형 Zeolites의 일산화탄소 흡착특성

Adsorption Characteristics of Carbon Monoxide on Zeolites Type CuHY and CuNaY

HWAHAK KONGHAK, February 1976, 14(1), 25-30(6), NONE
downloadDownload PDF

Abstract

동이온의 함량을 달리하는 CuHY 및 CuNaY에 대한 일산화탄소의 흡착등온선을 0 ℃에서 얻었다. NaY와 HY에 대한 일산화탄소의 흡착은 저압에서 "헨리"의식에 따랐으나 NaY에서는 나트륨이온, HY에서는 양성자가 동이온으로 교환됨에 따라 흡착특성은 동이온교환이 낮은 범위에서 "후로인드리히"식을 따르도록 변화된다. 동이온교환이 증가하면 "후로인드리히"도표는 경사가 다른 둘 또는 세 개의 직선부분을 나타낸다. 불균일 표면흡착에 대한 "크레머"의 설명방법과 "후로인드리히"식에 따라 이러한 등온선을 해석하면 동이온 교환정도가 클 때는 HY에 대하여서는 큰 공동내에 까지도 동이온이 교환될 수 있으나 NaY는 이것이 불가능하였다. 또한 "소다라이트" 구조내의 동이온은 CuNaY 및 CuHY에서 큰 공동내에 흡착된 일산화탄소에 영향을 주며 이 영향은 CuNaY보다는 CuHY에서 크게 나타났다.
Adsorption isotherms were determined at 0 ℃ for carbon monoxide on type CuHY and type CuNaY zeolites which have various cupric ion contents. Adsorption of carbon monoxide on NaY and HY obeyed the Henry's law at low pressures. As the sodium ions on NaY and the protons on HY were replaced by the cupric ions, the adsorption characteristics were changed to follow Freundlich equation at relatively lower level of cupric ion exchange. In case when the cupric ion exchange level increased further, the Freundlich plot showed two or three distinct segments of linear nature with different slopes. In view of cremer's explanation method and Freundlich equation for adsorption on heterogeneous surfaces, it may be concluded that, at higher level of cupric ion exchange, cupric ion can be exchanged even in the supercage on HY while it cannot on NaY and that the cupric ion exchanged in sodalite unit appears to have influences on the adsorption of carbon monoxide in supercage for CuNaY and CuHY. The influence was more pronounced for CuHY than for CuNaY.

Keywords

The Korean Institute of Chemical Engineers. F5, 119, Anam-ro, Seongbuk-gu, 233 Spring Street Seoul 02856, South Korea.
Phone No. +82-2-458-3078FAX No. +82-507-804-0669E-mail : kiche@kiche.or.kr

Copyright (C) KICHE.all rights reserved.

- Korean Chemical Engineering Research 상단으로