Development of a quantitative selection criteria based on the ion-exchange ratio of zeolite in ethanol dehydration.

Date

2012

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Restrictions

Restricted: Not available to the general public. Access is available only after consultation with author/thesis adviser and only to those bound by the confidentiality agreement.

Abstract

Zeolites are the typical adsorbents used in ethanol due to their sharp sieving effect between ethanol and water. Though generally the zeolites, whether synthetic or natural, are similar to their respective classes, there are still some notable differences within each class-one being the ion-exchange ratio of K+ for Na⁺. The study aims to investigate the effects of this ratio on the adsorbent's performance and to develop a selection criteria based on it. The effect of the ion-exchange ratio on the performance of the natural zeolite was investigated based on its capacity, regenerability, and selectivity. A general one-factor factorial design with three levels was used as the experimental design. It was found that the ion-exchange affects the adsorbent's regenerability and selectivity, primarily due to steric constraints of the K+ ion. Since the Zeolite works on the size exclusion concept, the presence of these ions inside the pores of the zeolite greatly in its regeneration and in its selectivity on the molecules that can enter its crystal structure.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2012 E62 C38

Document Type

Thesis

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