7results about How to "Well-developed pore structure" patented technology

The invention discloses a blast furnace flue gas dechlorinating agent prepared from red mud and a preparation method and application of the blast furnace flue gas dechlorinating agent, and belongs to the technical field of energy conservation and environmental protection. In the process, firstly, the red mud is calcined and ground into powder; and then adding silica sol and polyethylene glycol into the red mud powder, carrying out extrusion molding, and roasting to prepare the dechlorinating agent with certain strength. Compared with the conventional calcium oxide dechlorinating agent, the dechlorinating agent taking the red mud as the active component has the advantages of no pulverization, simple preparation process and low cost, and the red mud belongs to solid waste, so that the purpose of treating waste with waste can be realized when the dechlorinating agent is prepared from the red mud. The dechlorinating agent prepared by the method is used for removing hydrogen chloride in blast furnace gas, and has the characteristics of high removal rate, long penetration time and high chlorine capacity.

The invention provides a preparation method of sludge-based biochar for directionally enriching iron phosphate through synergistic modification of ferrous sulfate and sodium persulfate, and belongs to the technical field of harmless treatment and resource utilization of municipal sludge and environmental functional materials. According to the method disclosed by the invention, active phosphorus in the sludge is converted into a stable iron phosphorus compound in advance through oxidation-complexation dual effects of the ferrous sulfate heptahydrate and the sodium persulfate; the phosphorus-rich sludge is converted into more stable phosphorus-rich biochar through two-step heat treatment, the whole process of sludge pyrolysis is cooperatively regulated and controlled through Fe < 2 + > / S2O8 < 2->, integration of phosphorus release, phosphorus fixation and heavy metal passivation is achieved, the problem that in the prior art, the phosphorus retention rate is low is solved, phosphorus resources in the phosphorus-rich sludge are extremely retained and stabilized, and the phosphorus-rich sludge is obtained. The fixed rate of phosphorus in the modified sludge-based biochar with directionally enriched iron phosphate prepared by the method is greater than 99%.

This invention relates to a phenolic resin-based porous carbon and its preparation method, comprising reacting a pore-forming agent with formaldehyde to generate an active intermediate, then polymerizing it with phenol to obtain a porous carbon precursor; subsequently, carbonization, activation treatment, acid solution treatment, washing, and drying are performed; the pore-forming agent is a first pore-forming agent and / or a second pore-forming agent, wherein the first pore-forming agent is selected from one or more of acrylamide polymers, water-soluble acrylate polymers, vinylpyrrolidone polymers, polyacrylates, and alginates; and the second pore-forming agent is selected from one or more of vinyl alcohol polymers, polyethers, and water-soluble aliphatic polyamide polymers. By directly introducing the pore-forming agent as a reactive component into the synthesis process of phenolic resin, allowing it to participate in the construction of molecular chain segments, molecular-level dispersion and covalent fixation of the pore-forming component in the resin matrix are achieved, which helps to form a more developed, interconnected, and uniform pore structure, thereby improving the overall performance of the carbon material.

This invention relates to the technical field of solid waste resource utilization and environmental pollution control, and particularly to a method for co-preparing a biochar-steel slag composite adsorbent using steel slag and biomass. First, the raw steel slag is pretreated by coarse grinding, then mechanically activated and modified by high-energy ball milling to obtain finely ground steel slag powder. Next, the finely ground steel slag powder is mixed with a sodium bicarbonate solution and subjected to ultrasonic treatment in a water bath. Then, biochar bran is added in a specific ratio, and further ultrasonic treatment is performed for chemical composite modification. Finally, after solid-liquid separation, washing, and drying, a biochar-steel slag composite structure adsorbent is obtained. This invention, through a combined mechanical and chemical technique, significantly increases the specific surface area of ​​the material, exposes the internal active components, constructs a composite structure, and enriches the surface active functional groups, exhibiting excellent adsorption performance and rapid adsorption kinetics for heavy metal ions in wastewater.

The application discloses an NH2-COFS@ZnS photocatalytic material and a preparation method and application thereof. A multi-amino aromatic ligand and a multi-aldehyde aromatic ligand are combined into an NH2-COFS material through a Schiff base reaction, and the NH2-COFS material is combined with a zinc salt and a sulfur source through a hydrothermal reaction to obtain an NH2-COFS@Zn photocatalytic material. The NH2-COFS@ZnS photocatalytic material has excellent photocatalytic activity, good structural stability and reusability, can be applied to photocatalytic reduction of CO2, and has the advantages of simple preparation method, low cost and meeting industrial production.

The invention discloses a porous carbon material and a template-free preparation method thereof. The specific surface area of the porous carbon material is not less than 500 m < 2 > / g, and the total content of pyrrole nitrogen and pyridine nitrogen accounts for not less than 85% of the total nitrogen element; the method comprises the following steps: dissolving carboxylated chitosan and glucosamine hydrochloride in water to obtain a mixed solution; carrying out hydrothermal reaction on the mixed solution to form a hydrogel precursor with a gap structure; and drying the precursor, and carrying out carbonization treatment in an inert atmosphere to finally obtain the porous carbon material rich in pyrrole nitrogen and pyridine nitrogen. The method does not need to use any template agent and etching agent, and is simple in process, low in cost, green, environment-friendly and easy for large-scale production. The porous carbon material prepared by the invention has high specific surface area and high content of electrochemical active nitrogen species, and the lithium ion battery silicon-carbon negative electrode material prepared by taking the porous carbon material as a substrate shows excellent electrochemical performance.

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.