2results about How to "High carbon yield" patented technology

This invention belongs to the field of environmental engineering technology, and specifically discloses a method for treating phytoremediation-derived biomass containing heavy metals. This method utilizes bone meal to immobilize heavy metals in the biomass through a co-hydrothermal process, controlling the leaching of Cd within a safe threshold range and Zn far below the safe threshold. This ensures that the resulting hydrothermal carbon composite material does not pose an ecological risk due to excessive heavy metal release. Furthermore, the hydrothermal carbon composite material obtained by this method possesses characteristics such as uniformity, porosity, and a large specific surface area, exhibiting excellent heavy metal adsorption capacity, thus enabling its reuse as a soil remediation agent. This method eliminates the need for separating heavy metals from the phytoremediation-derived biomass, is simple in process, and avoids problems such as acid washing wastewater pollution and treatment.

This invention discloses a method for producing porous biomass carbon using Casuarina equisetifolia. The method involves reactively extruding Casuarina equisetifolia powder, ammonium polyphosphate, melamine, potassium acetate, urea, and water using a twin-screw extruder to obtain a rheological phase plasticizing precursor. This precursor is then refined through segmented curing and foaming, high-temperature reforming activation, hot water digestion, and ultrasonic acid washing to obtain porous biomass carbon. This invention utilizes a eutectic system to achieve low-temperature continuous processing of the precursor and inhibits equipment corrosion. A well-developed pore structure is constructed through a stepwise cross-linking foaming and mild activation strategy. The porous biomass carbon prepared by this invention has an ash content ≤1.12%, a carbon yield ≥35.7%, an iodine adsorption value ≥1278 mg / g, and a methylene blue adsorption value ≥175 mg / g. Furthermore, the process is continuous, with minimal equipment corrosion, making it suitable for industrial production.