1.​  Advanced combustion / gasification technologies with intensified interactions with pyrolysis ​

       Including two major advanced technologies based on intensified interactions with pyrolysis reaction to realize the leading-level low-tar and low-NOx targets at commercial scales for  gasification and combustion based on fluidized bed reactors, respectively.

        Fluidized bed two-stage low-tar gasification. It was successfully developed and commercialized to solve the "tar" problem of biomass gasification for production of clean producer gas. This was implemented by decoupling the reactions of gasification into fuel pyrolysis and char gasification to allow the optimal arrangement of tar cracking over high-temperature char. By far, 4 commercial plants treating 10-50 kt/a Chinese Herb Residue have been built and run for several years. The tar in their produced fuel gas by air-blown gasification is about 50 mg/Nm3. This in fact break through the technical difficulty encountered in deep “tar” abatement / removal for biomass gasification. Its application to low-rank coal for fuel gas is in construction of a commercial plant producing 30000 Nm3/h in Liaoning Province. Currently, we are in discussing the technology cooperation with FPInnovations of Canada to establish an oxygen-blown gasifier for producing wood-based syngas and in turn the substitute nature gas (SNG).

        Biomass low-NOx decoupling combustion. Taking advantage of the interaction between pyrolysis and combustion, this technology based on decoupling of fuel pyrolysis and char combustion, is then able to establish the reburning of gaseous pyrolysis products inside the char combustor to sufficiently suppress NOx formation and consequently realizes the high-efficiency burning of high-moisture and high-N fuels to reach the possibly extra low NOx emission, say, reducing about 80% in comparison with other traditional combustion methods. A plant treating 60 kt/a distilled dispirit lees has been built and run for more than 5 years in Luzhou, Sichuan province, while a few other plants treating 10-30 kt/a biomass wastes or furfural residue have also been built in different areas of China. More deployments are expected in the next 2 years.