Articles & Issues

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

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.

All issues

묵힘과정을 거친 제올라이트 A의 결정화 연구

Investigation on the Crystal Growth of Zeolite A with Aging Step

서곤

Seo G

HWAHAK KONGHAK, October 1985, 23(5), 295-301(7), NONE

Download PDF

Abstract

묵힘과정을 거친 반응물로부터 제올라이트 A의 결정화 과정을 조사하였다. 결정화 시간에 대한 결정 크기의 선형적 증가로부터, 묵힘과정에서 핵심생성을 확인할 수 있었다. 본 실험에서 묵힘 과정 동안 생성된 핵심의 농도는 10¹⁰-10¹¹cm^-3이었으며, 결정성장 속도 상수는 0.023μm min^-1이었다. 묵힘과정을 거쳐 핵심이 충분히 생성된 경우, 결정성장 속도는 확산제한, 핵심농도, 반응물의 농도 및 반응물내 제올라이트 A의 전체 표면적으로 나타낼 수 있었다. 고형 반응물이 남아 있는 동안, 제올라이트 A 생성률의 1/3승 값은 결정화 시간에 대해 직선관계를 보여 주었다.

The crystal growth of zeolite A from the reactant having aging step was studied. The nuclei formation in aging step was confirmed with the linear increase of crystal size for the crystallization time. The concentration of nuclei formed during aging step in this experiment was 10¹⁰-10¹¹cm^-3 and rate constant for crystal growth of zeolite A 0.023μm min^-1. When the sufficient amount of nuclei was formed through the aging step, the crystal growth rate was related with diffusion restriction, concentration of nuclei and the reactant, and the total surface area of zeolite A in the reactant. The cube root of the formation ratio of zeolite A satisfied the linear relationship with crystallization time, when armorphous solid was present.

Keywords