Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A nano-cluster, sludge carbon technology, applied in physical/chemical process catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve problems such as low uniformity, blocking of carrier voids, and large catalyst particles.
Inactive Publication Date: 2020-03-24
SUN YAT SEN UNIV
View PDF5 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0002] Magnesium oxide catalyst has excellent catalytic ozone oxidation effect, but because it exists in the form of powder, it is difficult to separate after use, which seriously hinders its practical promotion and application. Therefore, in order to solve the above defects, a magnesium oxide supported catalyst has emerged
[0003] At present, the preparation of magnesia-supported catalysts is usually prepared by the traditional deposition-precipitation method, but in the process of precipitation, it is difficult to control the nucleation position of the catalyst, and the catalyst particles formed by loading are large, low in uniformity, and easy to block. The gaps in the carrier lead to fewer catalytic sites, and the magnesia loaded on the surface of the carrier is prone to agglomeration, resulting in a decrease in catalytic efficiency, and the prepared magnesia-supported catalyst has disadvantages such as poor repeatability.
[0004] Although the magnesia-supported catalyst is intersected with magnesia powder, the catalytic efficiency and application have been improved to a certain extent, but the shortcomings of the above-mentioned magnesia-supported catalyst still need to be improved urgently, which will be more conducive to the promotion of magnesia-supported catalysts Applications
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0054] A preparation method of sludge carbon-based nano-cluster magnesium oxide catalyst, specifically comprising the following steps:
[0055] S1. Using residual sludge from municipal sewage treatment plants as a precursor material, coupled with paint slag and zinc benzoate as a pore-forming agent, a sludge carbon material with three-level structural pores, including macropores, mesopores, and micropores, was prepared. denoted as SC PS-Zn ;
[0056] S2. Weigh 2g of SC PS-Zn , add 1mol L -1 HNO 3 -3HCl 40mL, carry out surface carboxylation treatment under the condition of hydrothermal 150℃, 10h, after natural cooling, use deionized water to clean the residual oxidant (HNO 3 -HCl), dried and stored for later use, denoted as SC PS-Zn (AR);
[0057] S3. Using modified material SC PS-Zn (AR) is used as an adsorbent to adsorb magnesium ions in magnesium nitrate solution, and by controlling the contact time between the adsorbent and the adsorbate, the SC PS-Zn (AR) Carboxyli...
Embodiment 2
[0060] The influence of condition in the preparation process of embodiment 2
[0061] 1. To adopt SC PS-Zn Cause Analysis
[0062] Using nitric acid as an oxidant, the non-porous, macroporous, micro-mesoporous, microporous-mesoporous-macroporous sludge carbon materials (SC, SC PS 、SC Zn 、SC PS-Zn ) for surface carboxylation treatment, and its carboxylation effect was studied, and the content of acidic functional groups on the surface of different materials after carboxylation was determined by Boehm titration.
[0063] The measured results are as figure 1 shown by figure 1 It can be seen that different sludge carbon materials modified under the same hydrothermal conditions have a hierarchical pore structure sludge carbon (SC PS-Zn ) surface contains the highest amount of acidic groups (Acidic group), which is 0.95mmol L -1 , is a micro-mesoporous sludge carbon material (SC Zn ) is 1.94 times that of macroporous sludge carbon material (SC PS ) is 4.25 times that of slu...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention discloses a sludge carbon-based nanocluster magnesium oxide catalyst, a preparation method and applications thereof. The preparation method comprises the following steps: S1, adding a pore-forming agent to sludge used as a precursor material to prepare a three-level pore sludge carbon material, and recording the three-level pore sludge carbon material as SCPS-M; S2, carrying out surface carboxylation treatment on the SCPS-M by adopting an oxidizing agent, drying after the treatment is finished, and recording the obtained material as SCPS-M(AR); S3, adding the SCPS-M(AR) as an adsorbent into a magnesium nitrate solution, adsorbing magnesium ions, forming magnesium carboxylate on the surface of the porous sludge carbon, and recording the obtained material as Mg<2+>/SCPS-M(AR);and S4, calcining the Mg<2+>/SCPS-M (AR) to dehydrate the carboxyl so as to form the nano magnesium oxide cluster on the surface of the porous sludge carbon material, so that the sludge carbon-based nano-cluster magnesium oxide catalyst is obtained and is recorded as MgO/SCPS-M(AR). According to the method disclosed by the invention, the nucleation position of the catalyst is controlled, the covering uniformity of magnesium oxide on the surface of the precursor material is ensured, the formed magnesium oxide is small nano-particles, the hierarchical pore structure of the precursor material ismaintained to the greatest extent, and the catalytic efficiency of the catalyst is high.
Description
technical field [0001] The invention relates to the technical field of magnesium oxide catalysts, in particular to a sludge carbon-based nano-cluster magnesium oxide catalyst and its preparation method and application. Background technique [0002] Magnesium oxide catalyst has an excellent catalytic effect on ozone oxidation, but because it exists in the form of powder, it is difficult to separate after use, which seriously hinders its practical promotion and application. Therefore, in order to solve the above defects, a magnesium oxide-supported catalyst has appeared. [0003] At present, the preparation of magnesium oxide-supported catalysts is usually carried out by traditional deposition-precipitation method, but in the process of precipitation, it is difficult to control the nucleation position of the catalyst, and the catalyst particles formed by loading are large, low in uniformity, and easy to block. The gaps in the carrier cause fewer catalytic sites, and the magnes...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more