1results about How to "Enhance surface alkalinity" patented technology

The invention discloses a method for preparing nitrogen-doped biochar based on one-step co-pyrolysis of thermosetting resin and biomass. The method comprises the following steps: uniformly mixing urea resin solid powder, biomass and an activating agent; placing the mixed material in inert atmosphere protection, and carrying out temperature programming to 500-800 DEG C to carry out co-pyrolysis reaction; after the pyrolysis is completed, cooling, washing and drying to obtain the carbon material. According to the invention, one-step co-pyrolysis of urea-formaldehyde resin and biomass is utilized, effective doping of nitrogen element is realized at a relatively low temperature, in-situ molding of the material is realized by utilizing the thermosetting characteristic of urea-formaldehyde resin, and a molded carbon material with good mechanical strength can be obtained without an additional binder; the alkalescent potassium salt is selected as the activating agent and is environment-friendly, the prepared carbon material has high specific surface area and ultrahigh microporosity, the CO2 adsorption capacity is remarkably improved, the process is simple, and the energy consumption is low.