Thermal plasma technology: synthesis of nanoparticles

热等离子体技术是一个高科技领域，完全符合魁北克丰富的水电能源令人羡慕的地位。热等离子体是一种生产纳米粒子(金属、陶瓷和金属间化合物)的高效方法，我们已经展示了它们在几个系统(镍、铜、铝、二氧化硅、锡)中的用途。在本提案中，我们将重点介绍在两个相互竞争的系统C(转移弧等离子体和感应耦合等离子体)中合成陶瓷纳米颗粒，以便对最有前景的技术进行评估。具体地说，我们将研究二氧化硅稳定纳米二氧化钛的合成。挑战是保持这种材料的高光催化活性，同时将其应用于相对较高的温度体系。与我们以前的工作一样，主要的重点是反应堆的设计和放大。工业生产需要数百千瓦到兆瓦的功率，而大多数实验工作都在50千瓦以下。我们将在过去建模和实验工作的基础上再接再厉。

Thermal plasma technology is a high technology area which fits perfectly with Quebec's enviable position in abundant hydroelectric energy. Thermal plasmas are a highly effective way of producing nanoparticles (metallic, ceramic and intermetallic) and we have demonstrated their use in several systems (Ni, Cu, Al, SiO2, TiN). In the present proposal we will focus on the synthesis of ceramic nanoparticles in two competing systemc (transferred arc and induction coupled plasmas) to allow an assessment to be made of the most promising technology. Specifically we will study the synthesis of stable nanosized titania stabilized with silica. The challenge is to maintain the high photocatalytic activity of this material while applying it in relatively high temperature systems. As in our previous work, the major focus is on reactor design and scale up. Industrial production requires powers of hundreds of kW to MW while most experimental work has been at the sub 50 kW scale. We will build on past modelling and experimental work.