A Conceptual Demonstration of Decaffeination via Nanofiltration

Yee Kang Ong; Hui Ting Ng; Tai Shung Chung

doi:10.1021/acs.iecr.5b01737

A Conceptual Demonstration of Decaffeination via Nanofiltration

Yee Kang Ong, Hui Ting Ng, Tai Shung Chung^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

This study aims to evaluate the feasibility of using novel nanofiltration (NF) membranes for decaffeination of coffee wherein caffeine present in the feed solution is recovered at the permeate of the membrane. The NF hollow fiber membranes were fabricated and tested with model solutions to evaluate the recovery of caffeine as functions of molecular weight/size of organic molecules, caffeine concentration, and feed temperature. The results show that the recovery of caffeine and the permeate flux decrease with an increase in molecular weight/size of the organic molecules and the caffeine concentration in the feed. On the other hand, both recovery and flux increase with increasing feed temperature. Decaffeination of coffee is subsequently demonstrated at 55 °C using a roasted coffee solution wherein a 25% reduction of caffeine is achieved with a volume reduction factor of ∼1.2.

Original language	English (US)
Pages (from-to)	7737-7742
Number of pages	6
Journal	Industrial and Engineering Chemistry Research
Volume	54
Issue number	31
DOIs	https://doi.org/10.1021/acs.iecr.5b01737
State	Published - Aug 12 2015

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Publisher Copyright:
© 2015 American Chemical Society.

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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title = "A Conceptual Demonstration of Decaffeination via Nanofiltration",

abstract = "This study aims to evaluate the feasibility of using novel nanofiltration (NF) membranes for decaffeination of coffee wherein caffeine present in the feed solution is recovered at the permeate of the membrane. The NF hollow fiber membranes were fabricated and tested with model solutions to evaluate the recovery of caffeine as functions of molecular weight/size of organic molecules, caffeine concentration, and feed temperature. The results show that the recovery of caffeine and the permeate flux decrease with an increase in molecular weight/size of the organic molecules and the caffeine concentration in the feed. On the other hand, both recovery and flux increase with increasing feed temperature. Decaffeination of coffee is subsequently demonstrated at 55 °C using a roasted coffee solution wherein a 25% reduction of caffeine is achieved with a volume reduction factor of ∼1.2.",

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doi = "10.1021/acs.iecr.5b01737",

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AU - Ong, Yee Kang

AU - Ng, Hui Ting

AU - Chung, Tai Shung

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Y1 - 2015/8/12

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AB - This study aims to evaluate the feasibility of using novel nanofiltration (NF) membranes for decaffeination of coffee wherein caffeine present in the feed solution is recovered at the permeate of the membrane. The NF hollow fiber membranes were fabricated and tested with model solutions to evaluate the recovery of caffeine as functions of molecular weight/size of organic molecules, caffeine concentration, and feed temperature. The results show that the recovery of caffeine and the permeate flux decrease with an increase in molecular weight/size of the organic molecules and the caffeine concentration in the feed. On the other hand, both recovery and flux increase with increasing feed temperature. Decaffeination of coffee is subsequently demonstrated at 55 °C using a roasted coffee solution wherein a 25% reduction of caffeine is achieved with a volume reduction factor of ∼1.2.

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JO - Industrial and Engineering Chemistry Research

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A Conceptual Demonstration of Decaffeination via Nanofiltration

Abstract

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