Optimization of Alkaline Peroxide Pretreated Rice Husks Using Response Surface Methodology
- Type: Conference Presentation
- Conference Type: AIChE Spring Meeting and Global Congress on Process Safety
- Presentation Date: April 3, 2019
- Duration: 30 minutes
- Skill Level: Intermediate
- PDHs: 0.50
In the present work, rice husks were pretreated by NaOH combined with H2O2. High Performance Liquid Chromatography (HPLC) analysis was undertaken as the basis to investigate the reaction. RSM based on Box-Behnken statistical experiment design was applied to optimize operating conditions, which are suitable for maximum lignin and silica removal while maintaining most cellulosic components in the solid residues. Hence, as a result such modified rice husk residues will turn out to be more suitable for the utilization of energy production. Three independent variables of NaOH concentration, H2O2concentration and reaction temperature were studied by using Box-Behnken design. The optimized conditions are discussed according to two different criteria. The first one focused on the productivity and the optimized conditions are 8% NaOH, 1% H2O2and 20 °C. The second one emphasized the cost effectiveness and the optimized conditions are 5.29% NaOH, 1% H2O2and 20 °C. The validation experiments additionally confirm the reliability of the predicted model.
When emphasizing the productivity, the optimized conditions are 8% NaOH, 1% H2O2and 20 °C. When cost effectiveness is included, the optimized conditions are 5.29% NaOH, 1% H2O2and 20 °C. The 50.89% actual solid yield under criteria (a) has confirmed the successful treatment when considering the initial concentration of different components in rice husk (28.21% lignin, 16.5% ash and 5.01% extractives). The effectiveness of the designed experiment suggested rice husks can be considered as a possible sorbent candidate to relieve the water pollution issue cause by oil spills.
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