8results about How to "Increase the adsorption rate" patented technology

The invention belongs to the technical field of air purification, and particularly relates to an activated carbon adsorbent with ultra-high molecular weight polyethylene fibers as a framework and a preparation method of the activated carbon adsorbent. The activated carbon adsorbent is of a porous sheet structure and comprises 85-95 wt% of activated carbon powder, 1-10 wt% of a polymer and 0.2-3.0 wt% of an auxiliary agent, wherein the polymer is ultra-high molecular weight polyethylene or a mixture of ultra-high molecular weight polyethylene and high-density polyethylene; the polymer presents a cross network skeleton structure in a fibrous form, and the active carbon powder and the auxiliary agent are attached to the polymer fiber. The activated carbon adsorbent has the advantages of extremely low dust capacity in the use process, high content of effective components, small bed resistance, high harmful gas adsorption rate and the like.

This invention belongs to the field of activated carbon modification, specifically disclosing a method for controlling the synergistic enhancement of nitrogen and oxygen modification in activated carbon for H2S adsorption. The invention involves adding a nitrogen-containing reagent or continuously introducing a nitrogen-containing gas into an activated carbon reactor, causing the activated carbon to form a large number of nitrogen-containing functional groups on its surface after nitrogen modification treatment. The temperature of the activated carbon is then lowered to a first temperature, and a water vapor modification atmosphere is introduced into the reactor, thereby opening and generating adsorption channels in the activated carbon. Next, the temperature of the activated carbon is lowered to a second temperature, and an oxygen modification atmosphere is introduced into the reactor, causing a large number of oxygen-containing functional groups to form on the surface of the activated carbon. Finally, the activated carbon is cooled to room temperature in an inert gas atmosphere. This invention can generate a large number of nitrogen-containing and oxygen-containing functional groups on the surface of activated carbon, while simultaneously creating a large number of activated carbon adsorption channels, greatly improving the adsorption capacity of the activated carbon.

This invention provides a flow electrode particle, its preparation method, and its application. The flow electrode particle is a composite microsphere comprising a lithium-intercalating active material and a conductive material; the conductivity of the flow electrode particle is not less than 4.8 × 10⁻⁶. ‑4 S / m; the contact angle between the flowing electrode particles and water is 60-80°; the specific surface area of ​​the flowing electrode particles is 30-60 m². 2 / g. The flowing electrode particles provided by this invention have good conductivity and hydrophilicity, and good adsorption of lithium. The flowing electrode slurry prepared from them can be used in flowing electrode lithium extraction devices to improve the adsorption capacity and adsorption rate of lithium.

This invention provides a one-step in-situ preparation method for high-performance oatmeal-like composite adsorbent materials, along with its application, belonging to the field of liquid resource development and rare metal recovery technology. The preparation method includes the following steps: dissolving ferrous cyanide and sodium alginate in water to obtain solution A; dissolving a metal salt in water to obtain solution B; adding solution A dropwise to solution B to initiate a cross-linking reaction and then separating and washing to obtain the oatmeal-like composite adsorbent material. This invention also provides an application of the oatmeal-like composite adsorbent material in the separation and enrichment of cesium in radioactive wastewater. The preparation method of this invention greatly simplifies the process flow, avoiding the technical difficulties of complex preparation processes, easy powder agglomeration, and cumbersome composite processes inherent in traditional powder adsorbents. Furthermore, the prepared composite adsorbent material exhibits high adsorption capacity, adsorption rate, and cycle stability, making it easy to achieve continuous industrial operation.

This invention discloses a hierarchical guanidine resin-based CO2 adsorbent material and its preparation method, belonging to the field of polymer synthesis technology. The adsorbent material prepared by this invention has a composite spherical structure and a hierarchical pore structure, including micropores, mesopores, and macropores. By introducing a hierarchical pore structure, the adsorption capacity of the material for CO2 is effectively improved. The introduction of hierarchical pores can significantly reduce molecular diffusion resistance and increase the contact area between the adsorbent and CO2 molecules, thereby achieving rapid adsorption. Furthermore, pyridyl, polyamino compounds, and guanidine groups have strong basicity and chemical affinity for CO2. Through surface functionalization modification, the number of active sites on the material surface is significantly increased, thereby further improving the CO2 adsorption capacity and selectivity.

The application belongs to the technical field of biomass green high-value utilization, and more particularly relates to a traditional Chinese medicine stem biomass charcoal as well as a preparation method and application thereof. The traditional Chinese medicine stem-based porous carbon material with a columnar network porous structure is prepared through low eutectic solvent impregnation reflux pretreatment, high-temperature carbonization, acid washing, filtration and drying. The preparation method provided by the application can not only control the specific surface area of the traditional Chinese medicine stem-based porous carbon, but also retain N and S heteroatoms in the traditional Chinese medicine stem, and can also regulate the pore structure of the traditional Chinese medicine stem-based porous carbon. The obtained traditional Chinese medicine stem-based porous carbon is suitable for being used as an adsorption material for adsorbing and separating pollutants in water bodies, soil and other environments, and can also store a large amount of charges to improve the energy storage property of the material and be used for preparing electrochemical devices. The overall preparation method is low-carbon and environmentally friendly, the obtained biomass charcoal has a high specific surface area, and has good commercial application value.

The application belongs to the technical field of lithium extraction, and particularly relates to a titanium-based lithium extraction adsorbent and a preparation method and application thereof. The preparation method provided by the application comprises the following steps: a) mixing and grinding a lithium compound, a titanium compound, a zirconium compound, a niobium compound, an iron compound, a pore former and water, and drying to obtain a mixed powder; b) placing the mixed powder in a calcination device, first heating from ambient temperature to a first temperature at a first heating rate, then heating from the first temperature to a second temperature at a second heating rate, and calcining at the second temperature to obtain a precursor powder; c) granulating the precursor powder to obtain activated adsorbent particles; and d) placing the activated adsorbent particles in an acid solution for activation treatment to obtain the titanium-based lithium extraction adsorbent. The preparation method provided by the application can improve the adsorption capacity, ion selectivity and structural stability of the lithium extraction adsorbent, reduce the solution loss of the lithium extraction adsorbent, and prolong the service life of the lithium extraction adsorbent.

The invention relates to a water treatment technology, and aims to provide a preparation method of modified activated carbon and application of the modified activated carbon in PFASs adsorption. Comprising the following steps: carrying out acid activation treatment on granular activated carbon, washing with water, drying, and dispersing amorphous iron-based alloy powder containing Fe, Si and B into ethanol; immersing the activated carbon into an inorganic adhesive, uniformly stirring, adding an alloy dispersion liquid, and carrying out ultrasonic treatment, so that the iron-based alloy and the adhesive are uniformly distributed on the surfaces of activated carbon particles; and drying the composite material, and roasting in an inert atmosphere to obtain the granular modified activated carbon. After the activated carbon is modified, the diffusion path is remarkably shortened, and the adsorption rate can be increased; due to the small particle size and abundant surface active sites, the adsorption rate and capacity of PFASs are improved, and the modified activated carbon has good removal and stabilization effects on the precursor; gAC-Fe shows excellent performance in the aspect of adsorbing PFASs in AFFF, and the dual purposes of regeneration and pollutant removal can be effectively achieved.