Preface - kmutt

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application of these skills in their work. The
learning structure of C-ChEPS exposes the
learners every year to all the following 5
components: project-based learning, background
knowledge (Chemical Engineering), learning
tools, mindfulness and learning support. Thus,
the key performance indicators (KPI) for
learners' development are: 1) Learning skill, 2)
Chemical Engineering Knowledge, and 3)
General Skill.
Four classes (a total of 45 people) have
graduated from the C-ChEPS program. The
learning results have shown significant
development in the learners' self-confidence at
work, information seeking, communication, and
presentation skills. Moreover, they can apply
chemical knowledge to make reasonable
decisions in problem solving.
The company benefits from productivity
improvement, energy and cost savings a total
value of about 108 MBaht from a 4-year
operation of C-ChEPS program.
The effectiveness of C-ChEPS can be
seen from an increase in the participating
companies which now includes the following
four: Thai Plastic and Chemical Public Co. Ltd.,
Bangkok Synthetic Co. Ltd, The Aromatics
(Thailand) Public Co. Ltd, and National Petrochemical
Public Co. Ltd. as well as CCC.
Clearly, these companies appreciate the
development their employees get from the C-
ChEPS program.
The indirect result of the C-ChEPS
program has led the KMUTT and the Petrochemical
Industry into establishing a University
of Learning and learning being applied in the
workplace.
IC-051 ADSORPTION OF METALLIC IONS
FROM A METAL PLATING PROCESS ON
ACTIVATED CARBON
Suwassa Pongamphai, Supaporn Douglas,
Wittaya Teppaitoon, Peter L. Douglas
The 55 th Canadian Chemical Engineering
Conference, October 16-19, 2005, Metro
Toronto Convention Centre, Toronto, Ontario,
Canada
A shrinking core model was applied to
metallic ion adsorption on compacted particles
of coconut shell activated carbon. The model is
based on the shrinking core formulation for
catalytic reactions. The analysis of the external
liquid film mass transfer and intraparticle
KMUTT Annual Research Abstracts 2005
diffusion on the adsorption kinetics with
nonlinear adsorption and diffusion in a single
particle is presented.
The model was solved numerically and
optimized using nonlinear parameter estimation
to determine the film mass transfer coefficient
and internal effective diffusivity. Using the
estimated parameters, a parametric study was
carried out to study the effects of initial mass
and concentration of the adsorbate and adsorbate
particle size on the system kinetics.
The accuracy of the model will be
demonstrated by comparison with experimental
data on the adsorption of heavy metals from the
effluent stream from a metal plating process.
IC-052 EXTRACTION OF NIMBIN FROM
NEEM SEEDS USING SUPERCRITICAL
CARBON DIOXIDE WITH MODIFIER
Pathumthip Tonthubthimthong,
Supaporn Douglas, Suwassa Pongamphai,
Peter L. Douglas
The 55 th Canadian Chemical Engineering
Conference, October 16-19, 2005, Metro
Toronto Convention Centre, Toronto, Ontario,
Canada
The objective of this research was to
study the extraction of nimbin from neem seeds
(Azadirachta indica var siamensis valeton) using
supercritical carbon dioxide and modifier. Our
previous work, which focused on the extraction
of nimbin from neem seeds using pure
supercritical carbon dioxide, indicated that the
optimum extraction pressure was about 20 MPa.
In this paper, the effect of extraction
pressure, temperature, and the type of modifier
on extraction yield were studied using the Latin
Square technique to plan the experiments.
Extraction pressures were 10, 15, 20, 25 MPa;
extraction temperatures were 30, 35, 40, 45 °C
and methanol, ethanol, ethyl acetate and
dichloromethane modifiers were investigated.
The nimbin extraction experiments were
performed using 2 g of neem seed kernels with
an average size of 850 nm and 10% modifier for
an extraction time of 1 hour.
The results indicated that the extraction
yield depends significantly on the extraction
modifier. The maximum extraction yield was
0.099 mg/g neem seeds kernel, (fractional yield
of 97.17 %), obtained at P = 25 MPa, T = 45°C
using methanol. The maximum extraction yield
using methanol and a soxhlet was 0.1004 mg/g
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