Abstract: The present disclosure relates to an electrochemical method for converting captured CO2 into formate (HCOO?). This method involves capturing waste CO2 by co-absorption of the waste CO2 with green ammonia (NH3) to form ammonium bicarbonate (NH4HCO3) and converting the ammonium bicarbonate (NH4HCO3) into formate (HCOO?), wherein said converting is carried out in an integrated flow electrolyzer system. Another aspect of the present disclosure relates to an integrated flow electrolyzer system comprising an alkaline electrolyzer for producing green NH3 from NO3?, an NH3—CO2 absorbing unit whereby waste CO2 is co-absorbed with ammonia (NH3) to form ammonium bicarbonate (NH4HCO3), and a bicarbonate electrolyzer for converting the ammonium bicarbonate (NH4HCO3) into formate (HCOO?).

Abstract: The present disclosure relates to a membrane-free alkaline electrolyzer (MFAEL) system for converting nitrogen (N)-containing waste into ammonia (NH3). The system includes a reaction medium comprising H2O—NaOH—KOH; a pair of electrodes, wherein the electrodes are in contact with the reaction medium; and a power supply operably connected to the electrodes. Also disclosed is a method for converting nitrogen (N)-containing waste into ammonia (NH3). This method involves introducing nitrogen (N)-containing waste into a membrane-free alkaline electrolyzer (MFAEL) system and applying current between the electrodes to perform oxidative and reductive transformation of the nitrogen (N)-containing waste into ammonia (NH3).

Abstract: The present application relates to a system for removal of nitrate from water. The system includes a first reactor comprising a porous oxide-derived silver electrode (OD-Ag) for electrocatalytic reduction of nitrate (NO3?) to nitrite (NO2?) and a second reactor comprising a Pd-based catalyst for catalytic reduction of nitrite (NO2?). Also disclosed is a method of removing nitrate from water.

Abstract: This invention involves a method and plant of production of combustible gas using biomass. This plant comprises a furnace body, a furnace cavity, gasifying agent inlet, combustible gas outlet (arranged on furnace cavity and higher than gasifying agent inlet), and a device that ignites biomass arranged at intersection between the horizontal plane where the combustible gas outlet is located and the internal wall of the furnace cavity. Method of operation: load biomass in the plant and ignite the upper part; gasifying agent will run through the material from bottom to top, gasifying the material and generating flue gas. This invention features outstanding advantages of stable gasifying reaction, safe and reliable operation, high fuel gas calorific value, low environmental pollution, and easy purification of combustible gas etc. This method can be used to produce combustible gas from not only biomass, but also solid organic gasifying raw materials such as household garbage and industrial refuse etc.