Preparation process for columnar activated carbon capable of efficiently removing benzene in air, and product and application thereof

A preparation process, activated carbon technology, applied in other chemical processes, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of poor adsorption effect and high cost, and achieve the effects of increased adsorption capacity, long penetration time, and obvious adsorption capacity

Pending Publication Date: 2019-11-19
SHANGHAI NAT ENG RES CENT FORNANOTECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The modified granular coconut shell activated carbon has the characteristics of high efficiency and high unit adsorption capacity for the adsorption of benzene, but the cost is often high
Although the cost of columnar coal-based activated carbon is low, its adsorption effect is poor

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 process for columnar activated carbon capable of efficiently removing benzene in air, and product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A columnar activated carbon that efficiently removes benzene in the air. The columnar activated carbon is subjected to vacuum heat treatment to remove the gas and easily decomposed substances adsorbed in the pores; Ozone is used to oxidize the functional groups inside the pores; finally, an alkaline solution is used to adjust the surface groups to increase the number of oxygen-containing groups including carboxyl groups, lactone groups and hydroxyl groups. It is prepared according to the following steps:

[0033] Step 1 Vacuum heat treatment: take 10ml of columnar activated carbon (Xinhua Chemical, ZJ20) and vacuum heat treatment at 175°C in an oven for 10h;

[0034] Step 2 Pore adjustment: soak the activated carbon treated in step 1 with 1.0 mol / L sulfuric acid solution for 12 hours to adjust the micropores to move toward the mesopores, increase the number of acidic functional groups on the surface of the pores, and filter to remove excess acid;

[0035] Step 3 Drying ...

Embodiment 2

[0039] A kind of columnar activated carbon that efficiently removes benzene in the air is prepared according to the following steps:

[0040] Step 1 Vacuum heat treatment: take 10ml of columnar activated carbon (Xinhua Chemical, ZJ20) and vacuum heat treatment at 175°C in an oven for 10h;

[0041] Step 2 Pore channel adjustment: Immerse the activated carbon that has been vacuum heat-treated in step 1 with 1.0mol / L nitric acid solution for 12 hours to adjust the movement of the micropores to the mesopore direction, increase the number of acidic functional groups on the surface of the channels, and filter to remove excess acid solution;

[0042] Step 3 drying treatment: spread the columnar activated carbon obtained in step 2 and dry in an oven at 105°C for 24 hours;

[0043] Step 4 Ozone surface treatment: Add 10ml of coconut shell activated carbon into an ozonation device equipped with 100ml of deionized water, control the flow rate to 500ml / min, and pass through 100mg / L of ozo...

Embodiment 3

[0048] A kind of columnar activated carbon that efficiently removes benzene in the air is prepared according to the following steps:

[0049] Step 1 Vacuum heat treatment: take 10ml of columnar activated carbon (Xinhua Chemical, ZJ20) and vacuum heat treatment at 200°C in an oven for 10h;

[0050]Step 2 Pore adjustment: soak the activated carbon that has been vacuum heat-treated in step 1 with 1.5mol / L sulfuric acid solution for 12 hours to adjust the micropores to move toward the mesopores, increase the number of acidic functional groups on the surface of the pores, and filter to remove excess acid;

[0051] Step 3 drying treatment: spread the columnar activated carbon obtained in step 2 and dry in an oven at 105°C for 24 hours;

[0052] Step 4 Ozone surface treatment: add 10ml of coconut shell activated carbon into an ozone oxidation device equipped with 100ml of deionized water, control the flow rate to 500ml / min, and pass through 100mg / L of ozone for 2 hours;

[0053] Ste...

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

No PUM Login to View More

Abstract

The invention discloses a preparation process for columnar activated carbon capable of efficiently removing benzene in the air, and a product and application thereof. The preparation process comprisesthe following steps: subjecting columnar activated carbon to vacuum heat treatment to remove gases and easily-decomposable substances adsorbed inside pore channels; then carrying out impregnation treatment with an acid solution to increase surface acidic functional groups and adjust the structure of the pore channels; introducing ozone for oxidization of the functional groups inside the pore channels; and finally, adjusting the surface groups by using an alkali solution so as to increase the number of oxygen-containing groups including a carboxyl group, a lactone group and a hydroxyl group, and successively performing drying and cooling to obtain the columnar activated carbon. The columnar activated carbon prepared in the invention can efficiently remove benzene in the air, realizes the enrichment of benzene, and provides a healthy living environment for people.

Description

technical field [0001] The invention relates to a method for modifying columnar activated carbon, in particular to a preparation process of columnar activated carbon for efficiently removing benzene in the air and its product and application. Background technique [0002] Air pollution is one of the prominent problems facing our country at present. Volatile organic compound (VOC) pollution is an important source of air pollutants, among which benzene, toluene, and xylene are the most representative, and among these three, benzene is the most harmful , belonging to a class of carcinogens. [0003] The treatment methods of benzene include destructive methods such as catalytic combustion, corona method or plasma method. These methods have high requirements on processing equipment and a large one-time investment; Liquid and recycling is inconvenient, and it is not common in civil occasions. [0004] For benzene in indoor air, adsorption is the most commonly used method, among ...

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): C01B32/354C01B32/36B01J20/20
CPCC01B32/354C01B32/36B01J20/20
Inventor徐荣赵昆峰袁静蔡婷金彩虹
OwnerSHANGHAI NAT ENG RES CENT FORNANOTECH