Fundamental study of ultra clean, high efficiency combustion system with integrated mass and Heat recirculations

研究人员提出并研究了一种超清洁(不含CO2、NOx、SOx)、高效燃烧和气化系统，该系统使用煤炭或生物质等低质量燃料。通过将质量和热再循环相结合，提出了燃烧气化系统的新概念。对NOx和SOx排放大幅度降低的机理进行了实验和理论研究。一个有热再循环的超高温度场和一个全新的有质量再循环的反应场，二氧化碳的量很大，很容易液化，还原反应降低了NOx浓度，脱硫剂分解减少了SOx浓度。并对气化过程进行了研究。由于热再循环实现了高温场，富氢气化被证明是可能的，这是未来氢基能源系统最有前途的生物质利用技术之一。

The investigators has proposed and studied a ultra clean (CO2, NOx, SOx free), high efficiency combustion and gasification system that uses low quality fuels such as coal or biomass. By integrating the mass and heat recirculation, a new concept of combustion and gasification system has been proposed. The drastic reduction mechanisms of NOx and SOx emission are investigated both experimentally and theoretically. An unexpectedly high temperature field with heat recirculation and a totally new reaction field with mass recirculation, the amount of CO2 is so large that it can be easily liquefied, the NOx concentration is decreased due to the reduction reaction, and the SOx concentration is decreased due to the decreased decomposition of desulfurizer. Also, the gasification process has been investigated. Due to the high temperature field realized with the heat recirculation, the hidrogen-rich gasification is shown to be possible , which is one of the most promising utilization technology of biomass for future hydrogen -based energy systems.