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Sang Kompiang Wirawan
Chemical Engineering Department, Faculty Of Engineering, Universitas Gadjah Mada, Jalan Grafika No. 2, Yogyakarta 55281, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Social Sciences Other

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Journal : Equilibrium Journal of Chemical Engineering

 1 
Mathematical Modelling of Micronutrient Recovery from Vegetable Oil by Silica-based Adsorption: Vitamin E from Palm Fatty Acid Distillate Ari Diana Susanti; Wahyudi Budi Sediawan; Sang Kompiang Wirawan; Budhijanto Budhijanto
Equilibrium Journal of Chemical Engineering Vol 1, No 1 (2017): Volume 1 No 1 January 2017
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v1i1.40363

Abstract

Mathematical modelling on kinetics of batch adsorption of vitamin E separation from palm fatty acid distillate (PFAD) has been set-up and then applied for literature experimental data. Since the sizes of adsorbent particles used are usually relatively small, the concentration in the particles is assumed to be uniform. Hence, the adsorption rate is controlled by the rate of solute mass transfer from the bulk fluid to the surface of particles. In this model, the rate of mass transfer is assumed to be proportional to the concentration deviation from the equilibrium state. Meanwhile, the equilibrium models applied were coefficient distribution, Freundlich, and  Langmuir with  the  values  of  the  parameters obtained from literature data. It turned out that the model set-up can quantitatively describe the experimental kinetics data from literature. The value of mass transfer coefficient per unit adsorbent mass (kca) is obtained by curve fitting. It is also observed that the model proposed quantitatively describes the batch adsorption process well. The three equilibrium models applied are suitable for the mathematical modelling. Adjustment of the values of equilibrium isotherm parameters from literature significantly improves the accuracy of the model.
Penentuan Pelarut untuk Adsorpsi Oryzanol dari Minyak Bekatul dengan Investigasi Kromatografi Lapis Tipis (Thin Layer Chromatography) Ari Diana Susanti; Wahyudi Budi Sediawan; Sang Kompiang Wirawan; Budhijanto Budhijanto
Equilibrium Journal of Chemical Engineering Vol 1, No 2 (2017): Volume 1 No 2 July 2017
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v1i2.40424

Abstract

Oryzanol yang terkandung dalam minyak bekatul mempunyai kekuatan antioksidan lebih  tinggi  daripada vitamin E  dan  terbukti  mempunyai efek hipokolesteromik sehingga berguna untuk kesehatan jantung dan pembuluh darah. Metode adsorpsi menggunakan adsorben silika merupakan salah satu metode isolasi oryzanol yang menjanjikan. Keberhasilan proses pemungutan oryzanol sangat ditentukan oleh pemilihan pelarut yang digunakan karena oryzanol merupakan senyawa ester sehingga sifatnya mirip dengan sifat trigliserida minyak bekatul yang ingin dipisahkan darinya. Oleh karena itu perlu ditentukan pemodifikasi pelarut sehingga diperoleh campuran pelarut yang cocok untuk proses tersebut. Modifikasi dilakukan terhadap pelarut utama n-heksana dan pemodifikasi potensial yang digunakan adalah etil asetat, diklorometana, kloroform, dan aseton. Performa campuran pelarut diuji menggunakan metode kromatografi lapis tipis (thin layer chromatography - TLC) menggunakan plat TLC silika gel grade 60. Hasil penelitian menunjukkan  kombinasi  n-heksana/aseton  =  85/15  memberikan  hasil  pemisahan oryzanol terbaik, sedangkan kombinasi    n-heksana/etil asetat = 90/10 patut dipertimbangkan apabila elusi secara gradien dipilih dalam proses pemisahan.
Co-Authors Afrizal Luthfi Anggara Agus Prasetya Ari Diana Susanti Arif Rahman Hakim Asdi Restana Aswanti Mindaryani Bakti Berlyanto Sedayu Budhijanto Budhijanto Budhijanto Budhijanto Cahyono, Rochim Bakti Chandra Wahyu Purnomo Daniel Timotius Derek Creaser Derek Creaser Dian Ika Nugraha Dian Ika Nugraha Endang Tri Wahyuni Endhy Kesuma Ernie Ernie Hirofumi Hinode I Made Bendiyasa I Wayan Warmada Ihda Novia Indrajati Ivone Marselina Nugraha Jayanudin Jayanudin Martin Petersson Moh. Fahrurrozi Moh. Fahrurrozi Mohammad Fahrurrozi Muhammad Fajar Setiaji Muhammad Hartono Natalia Anasta Pandu Prabowo Jati Panut Mulyono Prasakti, Laras Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Sayoga Hidayatullah Sudibyo, Hanifrahmawan Suryo Purwono Venitalitya A. S. Augustia Venitalitya A. S. Augustia Wahyu Tri Handoyo Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Widra Putri Juwita Wiratni Budhijanto Yusmardhany Yusuf Zuliyana