Preparation method of reed-based biochar adsorption material

A technology of adsorption material and biochar, which is applied in the field of environmental engineering, can solve problems such as environmental pollution and waste of resources, and achieve the effects of shortening reaction time, reducing emissions, and improving the value of recycling

Inactive Publication Date: 2018-12-11
SHENYANG ACAD OF ENVIRONMENTAL SCI
View PDF3 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing reed-based biochar adsorption materials that overcomes the shortcomings of the existing modified biochar prepared from reed straws, which not only solves the problem of environmental pollution caused by the random treatment and disposal of w

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
  • Preparation method of reed-based biochar adsorption material
  • Preparation method of reed-based biochar adsorption material
  • Preparation method of reed-based biochar adsorption material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] A preparation method of reed-based biochar adsorption material is specifically:

[0036] Step 1: Wash, dry and crush the reed straw. The reed straw is taken from the wetland reed waste, and the size of the crushed reed straw is 50-100 mesh.

[0037] Step 2: Immerse the crushed reed straw into the KOH solution for activation and then dry it. The mass concentration of the KOH solution is 1000 kg / m³, and the mass ratio of KOH to the reed straw in the solution is 2:1 , The alkalization time is 12 h.

[0038] Step 3: Put the dried reed straw pulverized material into an atmosphere furnace, and conduct anaerobic high-temperature cracking under the protection of nitrogen, specifically:

[0039] ① Before heating up, pass N into the atmosphere furnace 2 30 min.

[0040] ② Continuous access to N 2 Heating under the conditions:

[0041] a. Within 10 minutes, the temperature in the furnace rises from room temperature to 100 o C, and at 100 o Keep at the temperature of C for...

Example Embodiment

[0047] Example 2

[0048] A preparation method of reed-based biochar adsorption material. Reed straws are washed, dried, crushed, immersed in an activation solution for activation treatment, dried, placed in an atmosphere furnace, cracked at high temperature under the protection of inert gas argon, and then cooled At room temperature, the pyrolyzed material is cleaned to neutrality, and the resulting product is a reed-based biochar adsorption material.

[0049] In this embodiment, the activation solution used is still KOH solution, the mass concentration is 1000 kg / m³, the mass ratio of KOH to reed straw is 3:1, and the activation treatment time is 12 h. When cleaning the carbonized straw, a HCl solution with a volume percentage of 10% is used.

[0050] The pyrolysis process is specifically:

[0051] ① Before heating up, inert gas is introduced into the furnace for 30 minutes.

[0052] ② Heating up under the condition of continuous inert gas:

[0053] a. Within 10 minutes, the temperat...

Example Embodiment

[0059] Example 3

[0060] A method for preparing a reed-based biochar adsorption material. After cleaning, drying, crushing, immersing in an activation solution for activation, drying, reed straws are put into an atmosphere furnace, cracked at high temperature under nitrogen protection, and then cooled to room temperature, Then the pyrolyzed material is cleaned to neutrality, and the resulting product is a reed-based biochar adsorption material.

[0061] In this embodiment, the activation solution used is still KOH solution, the mass concentration is 1000 kg / m³, the mass ratio of KOH to reed straw is 4:1, and the activation treatment time is 12 h. When cleaning carbonized straw, an HCl solution with a volume percentage of 8% is used.

[0062] The pyrolysis process is specifically:

[0063] ① Before heating up, pass N into the furnace 2 30 min.

[0064] ② Continuous access to N 2 Heating under the conditions:

[0065] a. Within 10 minutes, the temperature in the furnace increased from ...

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
Specific surface areaaaaaaaaaaa
Average pore sizeaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparation method of a reed-based biochar adsorption material. The preparation method is technically characterized by comprising the following steps of cleaning the reed stalk, drying and crushing; soaking the crushed reed stalk into a KOH (potassium hydroxide) solution to activate, and drying; putting the dried crushed reed stalk into an atmosphere furnace, and performing oxygen-free high-temperature cracking under the nitrogen or inert gas protection atmosphere; after high-temperature cracking treatment, cooling to room temperature, and cleaning the cracked material to be neutral by an acid solution, so as to prepare the reed-based biochar adsorption material. The preparation method has the advantages that the problems of pollution to environment and waste ofresources due to irresponsible disposal of the wetland plant wastes are solved; compared with the prior art, the specific surface area is large, the pollutant adsorption ability is strong, the environment-friendly value is greatly increased, and the resource utilization of the wastes is realized.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a preparation method of a reed-based biochar adsorption material. Background technique [0002] Constructed wetland is a sewage treatment ecological engineering technology developed on the basis of natural wetland to degrade sewage. In recent years, constructed wetlands have developed rapidly in my country, effectively improving the water environment quality of regions and river basins. As of 2014, the total wetland area in my country was 53.6026 million hectares, of which the constructed wetland area was 6.7459 million hectares. As my country's requirements for improving the quality of the water environment become increasingly stringent, and people's desire for a better environment continues to increase, the construction area of ​​constructed wetlands will continue to increase. [0003] As the main wetland plant, reed is an important part of constructed wetland. First...

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
IPC IPC(8): B01J20/20B01J20/28B01J20/30
CPCB01J20/20B01J20/28054B01J2220/485
Inventor 李子音赵传起张华张帆陈晓东许翼孙莹邵冰
Owner SHENYANG ACAD OF ENVIRONMENTAL 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