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Unformatted text preview: e was carried out over the catalysts using acetonitrile as solvent at 343 K under atmosphere pressure. The high activity and phenol selectivity observed under mild reaction conditions (343 K, atmospheric pressure) could be correlated to the 2 -1 enhanced textural properties such as BET surface area (403 -279 m g ) and large pore volume (0.903 -1 0.54 m g ). Conversion during catalytic performance followed the order RHA –10Cu50Ce >RHA– 10Cu20Ce > RHA–10Cu5Ce while phenol selectivity followed the order RHA –10Cu20Ce >RHA–10Cu50Ce 3+ > RHA–10Cu5Ce. Using method 2, a series of iron incorporated rice husk silica catalysts (5 - 20 wt % Fe ) were prepared. These catalysts were probed for the oxidation of phenol using H 2O2 as the oxidant. 3+ Catalytic performance increased up to 10 wt % Fe loading. Further increase in the Fe content reduced 3+ the phenol conversion. Higher Fe loading (>10 % Fe ) resulted in smaller pore size which lead to catalytic deficiency in phenol oxidation. Phenol oxidation by RH -10Fe gave 95.2 % conversion at 343 K with selective formation of 61.3 % catechol (CAT) and 38.7 % hydroquinone (HQ). The CAT/HQ ratio was found to be constant during the reaction suggesting a non free radical mechanism was operative. 45 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia KN-06 A NEWLY WATER SOLUBLE LIGNIN GRAFT COPOLYMER FROM OIL PALM LIGNOCELLULOSIC WASTE FOR HYDROCARBON DRILLING OPERATION
1 M. N. Mohamad Ibrahim, M. R. Ahmed-Haras and C. S. Sipaut 1 2 2 School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia School of Engineering and Information Technology, Universiti Malaysia Sabah, 88999 Sabah , Malaysia E-mail: firstname.lastname@example.org 1 In this study, water soluble lignin graft copolymer (LGC) was synthesis using oil palm empty fruit bunch (OPFEFB) fibre as a renewable biomass source. Initially, Kraft lignin (KL) was extract ed by exploiting the OPEFB fibre Kraft pulping residue. KL was grafted with acrylic acid (AA) by using p-toluenesulfonic acid (PTS) as a catalyst in the condensati...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.
- Spring '11