Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for synthesizing granular activated carbon catalyst while self-activating coconut shells under catalysis of calcium

A technology for synthesizing particles and self-activation, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of uneven dispersion of metal oxides, complicated preparation steps, Problems such as specific surface area and pore volume decrease

Pending Publication Date: 2020-10-23
中国林科院林产化工研究所南京科技开发有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another technical problem to be solved by the present invention is to provide a method for synchronously synthesizing granular activated carbon catalysts from calcium catalyzed coconut shells to prepare carbon-based CaO catalysts, which solves the problem of uneven dispersion of metal oxides in current carbon-based metal oxide catalysts and the preparation of The steps are cumbersome, the micropores are easily blocked, and the specific surface area and pore volume are seriously reduced.

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
  • Method for synthesizing granular activated carbon catalyst while self-activating coconut shells under catalysis of calcium
  • Method for synthesizing granular activated carbon catalyst while self-activating coconut shells under catalysis of calcium
  • Method for synthesizing granular activated carbon catalyst while self-activating coconut shells under catalysis of calcium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix dry coconut shells with a particle size of 0.18mm~0.28mm and 0.5mol / L lanthanum nitrate solution at a solid-to-liquid ratio of 1g:1.5mL, vacuum impregnate for 25 hours, and vacuum dry; place Ca-coir in the middle of the tube furnace , close the inlet valve, and after the tube furnace is pumped to vacuum, close the outlet valve, raise the temperature to 800°C, control the pressure at 0.12~0.13MPa by adjusting the outlet valve, and activate the catalytic pyrolysis for 4 hours; feed nitrogen into the tube furnace (200mL / min), heated to 900°C and calcined under normal pressure for 2h to prepare a hierarchical porous carbon-based CaO catalyst. The specific surface area of ​​the catalyst is 712.3m 2 / g, the total pore volume is 0.509cm 3 / g, the mesoporosity is 47.47%, and the average particle size of nano-CaO is 23.2nm.

Embodiment 2

[0028] Mix dry coconut shells with a particle size of 0.18mm~0.28mm and 0.5mol / L lanthanum nitrate solution at a solid-to-liquid ratio of 1g:1.5mL, vacuum impregnate for 24 hours, and vacuum dry; place Ca-coir in the middle of the tube furnace , close the inlet valve, and after the tube furnace is pumped to vacuum, close the outlet valve, raise the temperature to 800°C, control the pressure at 0.12~0.13MPa by adjusting the outlet valve, and activate the catalytic pyrolysis for 2 hours; feed nitrogen into the tube furnace (200mL / min), heated to 900°C and calcined under normal pressure for 2h to prepare a hierarchical porous carbon-based CaO catalyst.

[0029] figure 1 After the Ca-coconut shell obtained in this implementation case is cut and processed, the scanning electron microscope-X-ray energy spectrum analysis diagram of the inner cell wall shows no obvious change in the inner cell wall, and the elemental analysis at the box is detected to contain 2.77wt% lanthanum element...

Embodiment 3

[0037] Mix dry coconut shells with a particle size of 0.18mm~0.28mm and 0.5mol / L lanthanum nitrate solution at a solid-to-liquid ratio of 1g:1.5mL, vacuum impregnate for 24 hours, and vacuum dry; place Ca-coir in the middle of the tube furnace , nitrogen gas (200mL / min) was introduced into the tube furnace, the temperature was raised to 800°C for 2 h, and the temperature was raised to 900°C for 2 h under normal pressure to prepare the carbon-based CaO catalyst. The specific surface area of ​​the catalyst is 451.5m 2 / g, the total pore volume is 0.232cm 3 / g, the mesoporosity is 20.00%, and the average particle size of nano-CaO is 7.6nm.

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
sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

A method for synthesizing a granular activated carbon catalyst while self-activating coconut shells under the catalysis of calcium comprises the following steps: by using coconut shell particles as araw material, introducing calcium ions (Ca-coconut shells) into coconut shell cell walls by an isopyknic vacuum impregnation method; controlling a micro-positive pressure catalytic pyrolysis self-activation process of the calcium-coconut shell in a tubular furnace, regulating a microporous-mesoporous structure for synchronously generating the hierarchical porous granular carbon material and the nano size of a CaO active site, and synthesizing the hierarchical porous carbon-based CaO solid base catalyst. The yield of fatty acid methyl ester prepared by catalyzing soybean oil transesterificationreaches 98% or above, the catalyst can be filtered, recovered and recycled, and the catalytic activity of the catalyst is 6 times or above that of a CaO catalyst. When the carbon-based CaO granular catalyst is synchronously synthesized by using the method, an activating agent does not need to be additionally added, Ca in coconut shell cell walls can improve the mesoporous rate of the synthesizedcarbon material and form nano-oxides in situ in mesoporous channels, the prepared granular carbon-based catalyst is high in catalytic activity, and the preparation and recovery processes of the catalyst are simple, convenient and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of preparation and application of carbon-based catalytic materials, in particular to a method for synchronously synthesizing granular activated carbon catalysts through self-activation of calcium-catalyzed coconut shells. The preparation process is green and convenient, has high catalyst activity, and is conducive to regeneration and recycling. Background technique [0002] As an ideal alternative energy source for petrochemical diesel, biodiesel can be produced by transesterification of renewable vegetable oils. Traditional homogeneous transesterification catalysts have disadvantages such as corrosive equipment, difficult separation of catalysts, and easy generation of waste water, which makes heterogeneous transesterification catalysts attract more and more attention from researchers. CaO not only has strong basicity and high activity, but also is insoluble in methanol, so it can be used as a solid heter...

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): B01J23/02B01J35/10B01J37/02B01J37/08C11C3/10C10L1/02
CPCB01J23/02B01J37/0201B01J37/082C11C3/10C10L1/02B01J35/40B01J35/60
Inventor 孙昊蒋剑春孙康王傲卢辛成许伟陈超徐茹婷马明哲朱光真
Owner 中国林科院林产化工研究所南京科技开发有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com