Sains Malaysiana 41(7)(2012): 885–892
Optimization
of n-Hexane Reforming Using Taguchi Orthogonal Array Design
(Pengoptimunan Pembentukan Semula
n-Heksana Menggunakan Reka Bentuk Taguchi
Tatasusunan Ortogon)
Chandra Mohan Sinnathambi*
& Reem Ahmed Mohammed Ismail
Department
of Fundamental and Applied Science, Universiti Teknologi PETRONAS
Bandar
Seri Iskandar, 31750 Tronoh, Perak, Malaysia
Diserahkan:
16 Ogos 2011 / Diterima: 30 Januari 2012
ABSTRACT
Taguchi orthogonal array design, a statistical software is applied to n-hexane reforming. The purpose is to identify the most
significant process variable in reforming conditions favouring n-hexane
conversion to high aromatics and isomers and low cracked and coke precursor
reformate products. Actual experimental data were used for this study. Three
process variables i.e. temperature, contact time and hydrogen partial pressure
were investigated. From the study it was found that the contact time was the
most critical operating parameter for n-hexane conversion followed by reaction
temperature and hydrogen partial pressure. It was also noted that enhanced
n-hexane reforming conversion can be achieved by operating the process at
reaction temperature 723 K and contact time 7.1 min with a H2 partial pressure 300
kPa. For selectivity to aromatics and isomers lower contact time of 1.07 min
with intermediate hydrogen partial pressure of 300 to 500 kPa operating at a
reaction temperature of 723 K is most favourable.
Keywords: Aromatic; coke; conversion; n-hexane reforming;
selectivity
ABSTRAK
Reka bentuk Taguchi tatasusunan ortogon, satu
perisian, statistik telah digunakan untuk pembentukan semula n-heksana. Tujuan utama adalah untuk mengenal pasti
pemboleh ubah yang mementingkan proses pembentukan semula n-heksana bagi
menghasilkan aromatik dan isomer yang tinggi pengeluarannya dan kurangkan
produk retak dan kok. Data uji kaji telah digunakan untuk
kajian ini. Tiga pemboleh ubah telah dikaji iaitu
suhu, sentuhan masa dan separa tekanan hidrogen. Daripada
kajian ini, didapati bahawa sentuhan masa adalah parameter yang paling penting
dalam operasi penukaran n-heksana diikuti oleh suhu tindak balas dan separa
tekanan hidrogen. Selain itu, penukaran pembentukan semula n-heksana
boleh dipertingkatkan dengan menjalankan proses pada suhu 723 K, dengan
sentuhan masa selama 7.1 min dan pada 300 kPa separa tekanan hidrogen. Untuk
mementingkan penghasilan produk aromatik dan isomer, keadaan terbaik adalah
apabila sentuhan masa ialah 1.07 min, separa tekanan hidrogen yang sederhana
iaitu di antara 300 kPa sehingga 500 kPa dan pada suhu 723 K.
Kata kunci: Aromatik; kok; operasi penukaran;
pembentukan semula n-heksana; penghasilan produk
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*Pengarang
untuk surat-menyurat; email: chandro@petronas.com.my
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