PEROLEHAN SILIKAT DARI ABU SEKAM PADI DALAM SPOUTED-BED: EFEK PERPINDAHAN MASSA
Abstract
A 5 cm diameter spouted-bed reactor has been applied for solid-liquid reaction, paddy ash and NaOH producing Na-silicate. Hydrodinamics of spouted-bed reactor was studied by using paddy ash-water system. Correlation for minimum superfisial spouting (Ums) was determined and follows the equation.
( in cgs unit)
The spouted bed (SB) operates under transition regime i.e. Reynold number particle range 7-25 or Re number uid ranging from 19 to 254. The mass transfer is the controlling step for this system as for all solid-liquid reactions are very fast. So, a model of mass transfer has been derived and mass transfer correlation in SB follows equations Sh = 191,34 + 0,6325 Sc0.35 Re1.89
Above correlation shows high mass transfer at stagnant uid compared to other mass transfer correlations which is due to reacting system involved.
Kata kunci : sunbungan adhesives, perfonnansi kekakuan. performansi perpindahan panas.
References
Alex, J, dan Wanadri, A., Perolehan Natrium Silikat dari Abu Sekam Padi dalam Spouted-Bed, Penulisan Laporan dan Seminar & Penelitian, Jurusan Teknik Kimia ITB, 1995&1996.
Ali, R., and Yi, M-K, Production of Sodium Silicate from Paddy Husk, Union Burma, J. Sci. Technology, pp. 149-153, 1968.
Chen, J-M, and Chang, F-W, The Chlorination Kinetics of Rice Hull, Ind. Eng. Chem. Res., 30, pp. 2241-2247, 1991.
Grbavcic, Z.B., Vukovic, D.V., Zdanski, F.K., and Litmann, H., The Fluid Flow Pattern, Minimum Spouting Velocity and Pressure Drop in Spouted"Beds, Can. J. Chem. Eng., 54, pp.33-40, 1976.
Kirk, and Orthmer, Encyclopedia of Chemical Technology, 2"" Ed., 18,- John Wiley and Son Inc., USA, 1969.
Manurung, R, Sasmojo, R., dan Sitompul, J., Pengeringan Padi dalam Spouted-Bed dengan Menggunakan Energi Biomassa, Laporan Penelitian 940718_8, LP ITB, 1988.
Manurung, R., The Novel Reactor of Paddy Husk Gasifier, Doctor Thesis, University of Twente, Nelherland, 1994.
Mathur, K.B., and Epstein, N., Spouted Beds, Academic Press, NY, 1974.
Mulyono, H.A., Studi Terrno-Ekonomi terhadap Pengolahan.Natrium Silikat dari Sekam Padi, Laporan Penelitian Kerja Utama, Departemen Teknologi Kimia, 1974.
Nitta, B.V., and Morgan III, Particle Circulation and Liquid Bypassing in Three Phase Draft Tubed Spouted Beds, Chem. Eng. Sci., 47, pp. 3459-3466, 1992.
Reid, R.C.,, Prausnitz,'J., and Sherwood T.K., The Properties of Gases and Liquids, 3rd ed., McGraw-Hill, New York, 1917.
Tarigan, R, dan Husni, M., Pemanfaatan Abu Sekam Padi Limbah Pedesaan untuk Pembuatan Sodium Silikat, Laporan Penelitian Teknik Kimia, ITB, Bandung, 1986.
Trisnohadi, A., Suatu Percobaan Spouted-Beds Sistem Tjair-Padat, Laporan Kerja Utama, Departemen Teknologi_Kimia ITB, 1976.
