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（无二氧化碳、无氮氧化物、无硫氧化物）、高效燃烧和气化系统，该系统使用低质量燃料，如煤或生物质。将质量再循环与热量再循环相结合，提出了燃烧气化系统的新概念。从实验和理论两方面研究了氮氧化物和硫氧化物排放的急剧减少机理。热循环的意外高温场和质量循环的全新反应场，CO2量大，容易液化，还原反应使NOx浓度降低，脱硫剂分解减少使SOx浓度降低。此外，还对气化过程进行了研究。由于利用热循环实现高温场，富氢气化成为可能，是未来氢基能源系统中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.