5results about How to "Low ash content" patented technology

The invention belongs to the technical field of quinoline insoluble extraction and utilization and carbon material preparation, and particularly relates to a quinoline insoluble extraction method, spherical capacitance carbon and a preparation method thereof. The extraction method of the quinoline insolubles comprises the following steps: mixing coal liquefaction residues, quinoline, an extraction agent and a dispersing agent to form a mixed solution containing the quinoline insolubles; and adding an auxiliary agent into the mixed solution, mixing, standing and filtering to obtain the quinoline insoluble substance and an asphalt solution. The extraction method of the quinoline insoluble substances has the beneficial effects that the quinoline insoluble substances are extracted from the coal liquefaction residues through mixed solvent extraction-sedimentation, the high-purity asphalt product is obtained, the purity of the asphalt product and the quinoline insoluble substances can be remarkably improved, the ash content in related products is effectively reduced, and the production cost is reduced. The preparation requirement of the carbon material is met; the spherical capacitor carbon has the advantages of high specific surface area, high mechanical strength, low porosity, high volume energy density and high capacitance performance.

This invention discloses a system, method, single-walled carbon nanotubes (SHUs), and battery prepared by magnetic field-assisted plasma CVD, relating to the field of materials technology. The system includes a plasma evaporation unit, a magnetic field screening unit, and a CVD growth unit arranged sequentially. The magnetic field screening unit includes a magnetic field screening cavity, a temperature control component, and a magnetic field generating component. The magnetic field screening unit is positioned between the plasma evaporation unit and the CVD growth unit. By applying a magnetic field and coordinating with temperature control, catalyst particles are screened. This unit selectively removes large-diameter catalyst particles while retaining small-diameter ones, allowing for precise control of the particle size distribution. This reduces the defect density and ash content of the SHUs from the source, overcoming the bottleneck of traditional processes in the mass production of SHUs and significantly improving product purity and structural consistency.

This invention provides an online pH adjustment system for rice slurry, aiming to solve the problems of long pH adjustment time, high reagent consumption, and untimely reaction termination in existing technologies. Specifically, it includes a reaction tank, a transfer pump, a pre-installed automatic regulating valve, a flow meter, a pH adjustment unit, a mixing unit, and a closed-loop control unit. After the rice slurry is adjusted to the acceptable pH level by the pH adjustment unit, it is output to the next stage via the closed-loop control unit. Unacceptable slurry is returned to the reaction tank via the closed-loop control unit. This invention significantly improves the speed and accuracy of pH adjustment through a two-stage pH adjustment system and automatic control technology. The system can complete the pH adjustment of the material within 15-20 seconds and the pH adjustment of the entire reaction tank within 10 minutes, ensuring timely termination of the enzymatic hydrolysis reaction.

According to the quick cracker for preparing the bio-oil from the biomass, the electric heating layer arranged on the side wall of the inner container of the pyrolysis reactor body is combined with the vacuum heat preservation layer, so that the temperature can be accurately controlled, the heat loss is reduced, and the cracking reaction is ensured to be carried out in a uniform high-temperature environment; the matching design of a conical flow guide baffle and a stirring rod effectively prevents the materials from being accumulated and coked, and meanwhile, high-pressure gas introduced by an airflow spray head further strengthens turbulent mixing in the reactor; the cyclone separator is communicated with the pyrolysis reactor through a side filter screen, and is combined with two-stage collection of the material collecting bin, so that efficient separation of pyrolysis gas and solid residues is realized, and the ash content in bio-oil is reduced; and through cooperative work of a first spiral feeder and a second spiral feeder in the conveying assembly, continuous feeding of raw materials and timely discharging of products are guaranteed, and the automation degree of device operation is improved. The whole structure is compact, the heat efficiency is high, and the device is especially suitable for large-scale bio-oil preparation processes.

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.