8results about How to "Good adsorption and separation performance" patented technology

This invention discloses an N,S co-doped ultraporous carbon material, its preparation method, and its applications. The method involves synthesizing a precursor PS-3 via polymerization using 3-cyanopyridine and p-toluenesulfonic acid as raw materials. The precursor PS-3 is then subjected to high-temperature carbonization at different temperatures to obtain the N,S co-doped ultraporous carbon material with pore size. This invention eliminates the activation step, requiring only one reaction step, with mild reaction conditions and simple equipment. The ultraporous pores obtained in this invention have a pore size <0.6 nm, classifying them as ultraporous. This is mainly due to their lack of nitrogen adsorption but high carbon dioxide adsorption, indicating the presence of numerous ultraporous structures with pore sizes around 0.33 nm. The specific pore size and pore area were then determined using 195K carbon dioxide. Testing showed that the material can be used for ethane / ethylene adsorption separation, exhibiting excellent adsorption separation performance and a large adsorption ratio.

The application provides a bimetallic ZIF-8 adsorbent, a preparation method and application thereof, and the preparation method of the bimetallic ZIF-8 adsorbent is that a zinc metal precursor, a cobalt metal precursor and 2-methyl imidazole are fully ball-milled and uniformly mixed in a molar ratio of 1:(0.1-0.9):(2-10), then the uniformly mixed material is put into a reaction kettle, and is reacted at 120-200 DEG C, and then the product after reaction is calcined under air isolation conditions, so that the bimetallic ZIF-8 product is obtained. The preparation method of the bimetallic ZIF-8 adsorbent is simple in process, free of pollution and friendly to the environment. The bimetallic ZIF-8 adsorbent has a large specific surface area and pore volume, is used for separating single branched-chain and double branched-chain (multi branched-chain) alkanes from a C6-C10 isomeric alkane mixture, has a large adsorption amount of single branched-chain alkanes, and can efficiently separate single branched-chain / double branched-chain (multi branched-chain) alkanes.

This invention provides a method for synthesizing and applying modified SSZ-16 zeolite molecular sieve to CO2 adsorption and separation, relating to the field of chemical adsorbent technology. The invention involves mixing a silicon source, an aluminum source, an alkali source, a template agent, and water; crystallizing the resulting initial reaction gel and calcining it, then mixing it with an ammonium chloride solution for ion exchange; and then reacting the resulting ammonium-type SSZ-16 zeolite molecular sieve with a metal cation solution (Li). + Na + K + After ion exchange, the mixture is calcined to obtain modified SSZ-16 zeolite molecular sieve. This invention applies modified SSZ-16 zeolite molecular sieve to the field of selective CO2 adsorption and separation for the first time. The resulting modified SSZ-16 zeolite molecular sieve exhibits excellent CO2 / N2 and CO2 / CH4 gas adsorption and separation performance. In addition, this modified zeolite molecular sieve has the advantages of easy regeneration and excellent structural stability, and has better application prospects compared with other adsorbents.

The application relates to the field of water treatment, and particularly discloses a material membrane and a method for extracting humic acid in leachate. The material membrane comprises, by weight, 10-20 parts of polyvinyl alcohol, 5-10 parts of nano-aluminum oxide, 3-5 parts of mesoporous molecular sieve, 1-3 parts of glycerol and 80-100 parts of deionized water; the preparation method comprises the following steps: uniformly mixing the polyvinyl alcohol, the nano-aluminum oxide, the mesoporous molecular sieve, polyethylene glycol diacrylate and the glycerol, adding the deionized water, stirring and dissolving under the condition of temperature rising to 75-80 DEG C to obtain a mixed solution, pouring the mixed solution into a plane mold, drying and forming the plane mold under the condition of temperature of 50-60 DEG C, and keeping warm for 10-14 hours to obtain the material membrane. The material membrane is used for extracting humic acid in leachate, and has the advantages of reducing the content of humic acid in the leachate.

The invention belongs to the technical field of metal-organic framework (MOF) crystalline materials and gas adsorption and separation, and relates to a microporous 3D Zr-MOF material and a preparation method and application thereof. The chemical formula of Zr-MOF is {Zr6 (mu3-O) 2.66 (mu3-OH) 5.33 L3 (H2O) 2}, L is an organic ligand formed by removing four protons from H4L, and the structural formula of H4L is as follows: the microporous 3D Zr-MOF material provided by the invention can selectively separate C3H8 / CH4 and C2H6 / CH4 at normal temperature, and has the advantages of good stability, simple preparation method and the like.

This invention discloses a diesel fuel aromatic removal adsorbent, its preparation method, and its application. The main component of the adsorbent is silicon dioxide, which is synthesized through a hydrolysis reaction of organosilanes and alcohols in water. After washing and drying, the adsorbent is formed by rolling to control the particle size and achieve high sphericity. The formed adsorbent is then metal-modified, resulting in a large specific surface area and fast mass transfer rate. It is used to adsorb and separate aromatic components in diesel fuel, exhibiting advantages such as large adsorption capacity and high aromatic selectivity.

This utility model belongs to the field of coal chemical wastewater pretreatment technology, and discloses a resource substance recovery system for coal chemical wastewater, including an adsorption separation system, an adsorption material regeneration system, and a recovery and regeneration system. The adsorption separation system is used to adsorb and separate resource substances in the wastewater to be treated using adsorption materials. The resource substances in the wastewater to be treated include oils and phenols. The adsorption material regeneration system is used to regenerate the adsorption material using a regeneration solution. The recovery and regeneration system is used to regenerate the regeneration solution and separate and recover the adsorbed resource substances. This utility model achieves efficient separation of oils and phenols by filling the adsorption separation device with adsorption material. The adsorption material regeneration system provides a regeneration solution to the adsorption separation device to achieve elution and regeneration of the adsorption material, thereby realizing the recycling of the adsorption material and effectively reducing the recycling and treatment cost.

The invention relates to a preparation method and application of an MOFs / MWCNTs composite material adsorbent for CO2 / N2 adsorption separation. According to the method, the high-stability UiO-66-NH2 / MWCNTs composite material is synthesized in situ by adding multi-walled carbon nanotubes (MWCNTs) into the material UiO-66-NH2, and the composite adsorbent is more stable in physical property, higher in adsorption efficiency and better in cycle performance. The UiO series MOFs material selected in the adsorbent disclosed by the invention has good hydrothermal stability, the UiO-66-NH2 / MWCNTs have relatively high BET (Brunauer, Emmett and Teller) surface area and micropore volume, and the adsorbent has good adsorption separation performance.