Author/Authors :
abd-talib, norfahana universititeknologi malaysia(utm) - institute of bioproduct development, Skudai, Malaysia , ahmad, akil universititeknologi malaysia(utm) - centre of lipid engineering and applied research, ibnu sina institute for industrial and scientific research, Skudai, Malaysia , ahmad, akil university of kwazulu-natal - department of chemical engineering, Durban, South Africa , mohd-setapar, sitihamidah universititeknologi malaysia(utm) - centre of lipid engineering and applied research, ibnu sina institute for industrial and scientific research, Skudai, Malaysia , khamis, aidee kamal universititeknologi malaysia(utm) - institute of bioproduct development, Skudai, Malaysia , lokhat, david university of kwazulu-natal - department of chemical engineering, Durban, South Africa , ., . university of kwazulu-natal - department of chemical engineering, Durban, South Africa , rafatullah, mohd universiti sains malaysia - school of industrial technology, Malaysia
Abstract :
This paper investigates the efficiency of alkaline hydrogen peroxide (AHP) solution to remove silica from rice straw in a fixed-bed column. Characterization of rice straw was performed by using Fourier transforms infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) techniques. The experiments were operated with different bed heights (12 and 7 cm), influent H_2O_2 concentrations (2, 4, 6, 8 and 10 %) using constant flow rates (2 mL/min) in order to obtain experimental breakthrough curves. The maximum silica removal was observed 3.0575 mg/g at 8% of AHP influent concentration at 12 cm bed depth. To evaluate the column performance, Adams–Bohart model and Thomas model were used. To analyzed the Adams– Bohart and Thomas model parameter the value of rate constant decreases with increase of influent concentration, but increases with increasing the bed depth.
Keywords :
Rice straw , AHP , Fixed bed column , Silica , Breakthrough analysis
