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Solar Energy Renewable, Abundant, clean and readily available

Solar Energy Renewable, Abundant, clean and readily available . Recovery of Glycol oil from Silicon Waste. Yu-Pei Shih Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, Taiwan. What is silicon waste??.

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Solar Energy Renewable, Abundant, clean and readily available

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  1. Solar Energy Renewable, Abundant, clean and readily available Recovery of Glycol oil from Silicon Waste Yu-Pei Shih Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, Taiwan. What is silicon waste?? In silicon wafer manufacturing, silicon ingots must be cut by multiple wiresaws with an abrasive slurry composed of SiC particles in a glycol oil. This silicon waste drains away with the slurry. In the world at least 3000 ktons of silicon waste is generated and this glycol oil drains away with the slurry. However, the glycol oil in sawing waste can be as high as 45% by weight. Therefore, a sufficient recovering glycol oil from silicon waste could yield enough glycol oil to support silicon solar cell production and reduced pollution. • Difficulty: • Particles suspended stability • High viscosity of waste • With a lot of small size particles 4. The properties of glycol oil 2. The solid-liquid separation Part 1-Appearance • Recovered glycol oil may be reuse to silicon cutting process. How can I do to recovery the glycol oil from silicon waste?! Part 1- Centrifugation separation (3000 g / 5500 rpm / 25℃&40℃) For origin oil Suspension solids =0 g/L Turbidity= 0.5 NTU Part 3-Suspension • Recycling Origin Part 2-Newtonian fluid Part 4- GC Analysis Part 2- Centrifugation separation with 50 wt% dilutes.(3000 g / 5500 rpm / 25℃) For origin oil Suspension solids =0 g/L Turbidity= 0.5 NTU 3. Liquid-Liquid separation • Advantages of liquid-liquid phase separation: • Without the equipments for vacuum or the • formation of steam • Prevented pyrolysis • Fast & simple equipment • Recycled the water • Removed the small size particles • =particles • Controlled by: • Viscosity & hindered effect • Removal small size particles origin • Compared ability of removal water by • simple distillation & phase separation: recovery Richwaterphase Richoilphase hydrogen bonds • oil & water mixing • oil & water separation Electrochemistry Process Waste Reduction Lab Centrifugation with 50 wt% water. (3000 g / 6 hr/ 25℃)

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