Enhancing Hydrogen Production Efficiency from Diamond-Wire Sawing Silicon Waste
Key Ideas
- A study proposes a technique to improve hydrogen production efficiency from Diamond-Wire Sawing Silicon Waste (DSSW).
- Grinding DSSW with KCl as a grinding agent significantly increases hydrogen yield and initial hydrogen generation rate.
- DSSW-KCl 25 wt% ground for 3 minutes shows the best performance with 86.1% hydrogen yield and high IHGR.
- The research explores the influence of grinding duration, addition amount, and temperature on hydrogen production efficiency.
The article discusses a study conducted in Kunming, China, aimed at enhancing hydrogen production efficiency from Diamond-Wire Sawing Silicon Waste (DSSW). DSSW, a byproduct of the silicon wafer sawing process, poses environmental challenges if not properly managed. The research proposes a simple technique involving grinding DSSW to accelerate the hydrolysis reaction for efficient hydrogen production. Among various grinding agents studied, KCl demonstrates superior performance. The study highlights the significant impact of grinding duration, addition amount, and temperature on the hydrogen yield and initial hydrogen generation rate (IHGR). DSSW-KCl 25 wt% ground for 3 minutes achieves the best performance with 86.1% hydrogen yield and a high IHGR of 399.37 mL min−1 (g DSSW)−1 within 650 seconds. Furthermore, the research investigates the influence of temperature on the reaction, showing that at 338 K, the reaction can reach 85% conversion in 100 seconds with a remarkable IHGR. The study also determines the apparent activation energy for the hydrolysis reaction of the DSSW-KCl composite powder. Overall, the findings suggest that this method could significantly enhance hydrogen production efficiency from DSSW, contributing to sustainable energy solutions.