Malaysian Journal of Analytical Sciences Vol 21 No 2 (2017): 452 - 459

DOI: https://doi.org/10.17576/mjas-2017-2102-21

 

 

 

RESPONSE SURFACE METHODOLOGY ON WAX DEPOSIT OPTIMIZATION

 

(Pengoptimuman Lilin Mendap Menggunakan Kaedah Gerak Balas Permukaan)

 

Norida Ridzuan*, Zulkefli Yaacob, Fatmawati Adam

 

Faculty of Chemical Engineering & Natural Resources,

Universiti Malaysia Pahang, 26300 Gambang, Pahang, Malaysia

 

*Corresponding author: norida@ump.edu.my

 

 

Received: 21 October 2015; Accepted: 14 June 2016

 

 

Abstract

In this study, the application of response surface method design based on rotatable central composite design (CCD) was used to optimize wax deposit using Design Expert 7.1.6 software. The process consisted of 13 experiments involving eight factorial points and five replications at the center point. The influence of operating parameters on the weight of wax deposit was investigated using cold finger apparatus. The experimental result indicated that the amount of wax deposit was significant due to factors of cold finger temperature and experimental duration. The wax deposit amount decreased significantly with the decrease of experimental duration when the cold finger temperature increased to 25 °C. The minimum value of 0.0042 g of wax deposit was obtained at the optimized conditions of 1.5 hours  and 25 °C, respectively.

 

Keywords:  cold finger method, crude oil, optimization

 

Abstrak

Dalam kajian ini, penggunaan kaedah gerak balas permukaan berdasarkan reka bentuk komposit berpusat berputar (CCD) digunakan bagi mengoptimumkan lilin mendap menggunakan perisian Design Expert 7.1.6. Proses ini terdiri daripada 13 eksperimen yang melibatkan lapan titik faktorial dan lima ulangan di titik pusat. Pengaruh parameter operasi terhadap berat lilin mendap telah dikaji dengan menggunakan radas jejari sejuk. Hasil eksperimen menunjukkan bahawa jumlah lilin mendap dipengaruhi oleh faktor suhu jejari sejuk serta tempoh eksperimen.  Jumlah lilin mendap akan berkurang sekiranya tempoh eksperimen dikurangkan berserta peningkatan suhu jejari sejuk kepada 25 °C. Nilai minimum 0.0042g lilin mendap telah diperolehi pada keadaan yang optimum iaitu pada 1.5 jam dan 25 °C .

 

Kata kunci:  kaedah jejari sejuk, minyak mentah, pengoptimuman

 

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