Gas hydrate accelerant based on nanoparticles and Gemini surfactant and application of accelerant

A technology of surfactants and gas hydrates, applied in the direction of gas fuels, other chemical processes, chemical instruments and methods, etc., can solve the problems of deposition, promotion efficiency that cannot meet the requirements of industrial applications, cluster aggregation, etc., and achieve biological safety High, excellent surface activity, the effect of increasing the reaction rate

Active Publication Date: 2021-06-11
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the high thermal conductivity and large surface area of ​​nanofluids, the literature "Zhou Shidong, Yu Xuewei, Li Qingling, Li Le. Effects of Nano-Graphite Particles and SDS on Hydrate Formation Characteristics [J]. Natural Gas Chemical Industry (C1 Chemistry and Chemical Industry) ,2017,42(2), 50-53+118."It was found that dispersing graphite nanoparticles in surface-active SDS can strengthen CO 2 Hydrate formation, but due to high hydrophobicity, nanoparticles are prone to cluster aggregation and deposition in the aqueous phase
Generally speaking, the promotion efficiency of existing accelerators for hydrate formation cannot meet the requirements of industrial applications, and the recovery and secondary utilization of chemical reagents need to be solved

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
  • Gas hydrate accelerant based on nanoparticles and Gemini surfactant and application of accelerant
  • Gas hydrate accelerant based on nanoparticles and Gemini surfactant and application of accelerant
  • Gas hydrate accelerant based on nanoparticles and Gemini surfactant and application of accelerant

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The preparation method provided by the invention has simple process, mild conditions, low original cost and broad application prospect. Compared with traditional single-chain anionic surfactants (such as sodium lauryl sulfate SDS), the Gemini surfactant used in the present invention has double hydrophilic and hydrophobic groups, has lower critical micelle concentration and stronger surface reduction Tension ability, showing more excellent surface activity; and has a very low Kraff point, strong temperature stability, and high biological safety.

[0036] The experimental methods described in the following examples can be carried out with reference to conventional techniques for the process parameters not specifically noted; the reagents and materials can be obtained from commercial sources unless otherwise specified.

[0037] The method for detecting and measuring this method to prepare product promoting effect is as follows:

[0038] The detection equipment is a visual...

Embodiment 1

[0043] Firstly, styrene was rinsed three times with 10% sodium hydroxide solution to remove hydroquinone as a polymerization inhibitor, then washed three times with deionized water, and stored in a freezer at -20°C. Add 95g of deionized water, 0.1g of nano Fe 3 o 4 and 1.0g emulsifier AOT, turn on the magnetic stirring at 300rpm and stir for 30min, and then use ultrasonic waves to disperse the liquid. Vacuum the nitrogen to remove the air in the pipeline. Add 5.0g styrene and 0.1g ammonium persulfate, raise the temperature to 70°C, under the protection of nitrogen, carry out emulsion polymerization reaction, keep stirring for 5h, and naturally cool down to room temperature to obtain the product 10% Fe 3 o 4 &AOT@PSN-1.

[0044] Detection and determination:

[0045] The above-mentioned accelerator is configured as 1.0mol surfactant AOT / L aqueous solution, and under the conditions of initial temperature 6°C and initial pressure 8.0MPa, the natural gas hydrate promotion perf...

Embodiment 2

[0047] The same operating steps as in Example 1, quantitatively weigh 90g deionized water, 0.1g nanometer Fe 3 o 4 , 1.0g emulsifier AOT, 10.0g styrene and 0.1g ammonium persulfate, emulsion polymerization for 5h, after the reaction, the product 10% Fe 3 o 4 &AOT@PSN-2.

[0048] Detection and determination:

[0049] The above-mentioned promoters are configured as 0.5mol, 1.0mol, 2.0mol surfactant AOT / L aqueous solution, and under the conditions of initial temperature 6°C and initial pressure 8.0MPa, test and determine The accelerator accelerates the induction time of hydrate formation, and the experimental results are shown in Table 1.

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
purityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a gas hydrate accelerant based on nanoparticles and a Gemini surfactant and application of the gas hydrate accelerant. According to the gas hydrate accelerant based on nanoparticles and a Gemini surfactant, the gas hydrate accelerant is formed by immobilizing nano Fe3O4 and an emulsifier on the surface of polystyrene based on emulsion polymerization reaction under an anaerobic operation condition by taking styrene as a monomer, deionized water as a solvent, peroxide as an initiator and the Gemini surfactant as the emulsifier. According to the gas hydrate accelerant provided by the invention, the Gemini surfactant and the nano Fe3O4 are wrapped on the surface of the polystyrene sphere, so that the heat and mass transfer rate can be improved, and the gas storage capacity cannot be reduced due to the fact that the Fe3O4 immobilized on the surface of a polymer occupies the position originally belonging to a single-chain surfactant SDS.

Description

technical field [0001] The invention relates to the technical field of natural gas hydrate formation and application, in particular to a gas hydrate accelerator based on nanoparticles and Gemini surfactant and its application. Background technique [0002] Hydrate is a non-stoichiometric cage compound formed between guest molecules and water under certain pressure and temperature conditions. Theoretically, 1m 3 Natural gas hydrate can store 120~170m 3 Standard state natural gas. Due to the high density and good stability of gas storage, the hydrate technology is widely used in gas storage and transportation, CO 2 It has potential application prospects in the fields of capture, gas separation, seawater desalination and cold storage. However, due to technical problems such as high formation conditions, slow hydration rate, long induction period, and low gas storage density, the large-scale industrial application of hydrate technology is greatly restricted. [0003] In ord...

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
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00C10L3/10C08F2/26C08F112/08C08F2/44C08K3/22
CPCC09K3/00C10L3/108C08F2/26C08F112/08C08F2/44C08K3/22C08K2003/2275C08K2201/011
Inventor 龙臻梁德青周雪冰何勇
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap