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

크로마토 그라프법에 의한 Molecular Sieves 흡착 충진충의 파라메터 산출

Chromatographic Parameter Estimation of Adsorption Packed Column with Molecular sieves

HWAHAK KONGHAK, April 1981, 19(2), 95-106(12), NONE
downloadDownload PDF

Abstract

Molecular sieves(MS) 3A, 5A, 및 13X의 충진층 유통계(층류역)에서 20 ℃하의 질소 흡착에 대한 파라메터들을 구하기 위하여 시간역해석을 하였다. 파라메터 중 추방향분산계수와 총괄유효확산계수는 오차도표에서 구하였다.
MS 3A, 5A, 및 13X의 ρpKA는 각각 0.08, 11.22, 2.32로서 3A에는 질소가 거의 흡착하지 않았다. α는 모두 0.27∼0.33 범위이고 De 는 5A 및 13X에서 0.006∼0.008 ㎡/sec의 값을 얻었으나 3A에서는 비교적 넓은 범위의 값인 0.004∼0.01 ㎠/sec를 얻었다.
한편 종래의 모멘트법에 의하여 역시 파라메터들을 구하고 시간역해석에 의한 값들과 비교 하였다. 1차 모멘트에서 구한 ρpKA 는 시간역해석의 값들과 상호 유사한 값을 가졌으나 2차 모멘트에서 산출된 α와 De는 두 방법 사이에 약간의 차이가 있었다.
The parameters are determined by time domain analyses for flow system(laminar region) of nitorgen adsorption on molecular sieves (MS) 3A, 5A, and 13X in a packed column at 20 ℃. Among the parameters, axial dispersion coefficients and overall effective diffusivities are determined from error maps.
The ρpKA values obtained for MS 3A, 5A, and 13X are 0.08, 11.22, and 2.32, respectively, and show that nitrogen hardly adsorbs on 3A. The values of α are all in the range of 0.27∼0.33, and the De values of both 5A and 12X are 0.006∼0.008 ㎠/sec; but the De value of 3A has a rather wide range of 0.004∼0.01 ㎠/sec.
The paramethers are also evaluated by usual moment method and compared with those from the time domain analyses. ρpKA values obtained from the first order moment are from the time domain analyses. ρpKA values obtained from the first order moments are similar to those from the time domain analyses, but α and De values from second order moments show a little difference between the two methods.

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