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Biochar/zeolite composite adsorbent material and preparation method thereof

A composite adsorption and biochar technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as difficult to achieve purification effect, complicated treatment process, etc., to achieve environmental protection and good economic benefits Effect

Inactive Publication Date: 2020-02-11
SHANXI AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when treating some wastewater with complex components, it is difficult to achieve the purification effect by using activated carbon or zeolite as a single adsorbent, and the combined treatment process is relatively complicated.

Method used

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  • Biochar/zeolite composite adsorbent material and preparation method thereof
  • Biochar/zeolite composite adsorbent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a method for preparing biochar / zeolite composite adsorbent material from biomass, comprising the following steps:

[0028] 1) The biomass raw material is dried and dehydrated to less than 1%: After the solid biomass is preliminarily cleaned to remove impurities such as soil, the biomass is fully dehydrated in a drying oven or under natural ventilation conditions until the moisture content does not exceed 1%.

[0029] 2) The dried raw materials are crushed to particles below 1mm: the dried raw materials are crushed by a pulverizer and passed through a 1mm sieve to make them into particles with a diameter not greater than 1mm;

[0030] 3) Thermal cracking treatment: pyrolyze the obtained biomass particles in a microwave pyrolysis furnace under protective gas such as nitrogen, helium or oxygen-limited conditions, using a temperature of 400°C and a holding time of 1-2 hours to obtain biochar Material;

[0031] 4) Alkali zeolite treatment: add the o...

Embodiment 2

[0035] This embodiment provides a method for preparing biochar / zeolite composite adsorbent material from biomass, comprising the following steps:

[0036] 1) The biomass raw material is dried and dehydrated to less than 1%: After the solid biomass is preliminarily cleaned to remove impurities such as soil, the biomass is fully dehydrated in a drying oven or under natural ventilation conditions until the moisture content does not exceed 1%.

[0037] 2) The dried raw materials are crushed to particles below 1mm: the dried raw materials are crushed by a pulverizer and passed through a 1mm sieve to make them into particles with a diameter not greater than 1mm;

[0038] 3) Thermal cracking treatment: pyrolyze the obtained biomass particles in a microwave pyrolysis furnace under nitrogen, helium and other protective gases or oxygen-limited conditions, using a temperature of 600°C and a holding time of 1-2 hours to obtain biochar Material;

[0039] 4) Alkaline zeolite treatment: add...

Embodiment 3

[0042] This embodiment provides a method for preparing biochar / zeolite composite adsorbent material from biomass, comprising the following steps:

[0043] 1) The biomass raw material is dried and dehydrated to less than 1%: After the solid biomass is preliminarily cleaned to remove impurities such as soil, the biomass is fully dehydrated in a drying oven or under natural ventilation conditions until the moisture content does not exceed 1%.

[0044] 2) The dried raw materials are crushed to particles below 1mm: the dried raw materials are crushed by a pulverizer and passed through a 1mm sieve to make them into particles with a diameter not greater than 1mm;

[0045] 3) Thermal cracking treatment: pyrolyze the obtained biomass particles in a microwave pyrolysis furnace under nitrogen, helium and other protective gases or oxygen-limited conditions, using a temperature of 700°C and a holding time of 1-2 hours to obtain biochar Material;

[0046] 4) Alkaline zeolite treatment: the...

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Abstract

The invention discloses a biochar / zeolite composite adsorbent material and a preparation method thereof. The preparation method comprises steps as follows: 1) drying and dehydrating a biomass raw material to 1% or below; 2) crushing the dried raw material into granules of 1 mm or below; 3) performing thermal cracking treatment; 4) performing alkali liquor zeolitization treatment; and 5) performingcleaning. By use of the method, ash components in biochar are subjected to hot alkali liquor treatment to obtain Y-type zeolite, the Y-type zeolite and a bonding effect with biochar to form a super adsorbent material, and the material has significant effects on heavy metals, nitrogen oxides, sulfur oxides, antibiotics and the like in sewage.

Description

technical field [0001] The invention belongs to the technical field of adsorbent preparation, and in particular relates to a biochar / zeolite composite adsorbent material and a preparation method thereof. Background technique [0002] With the development of industrialization and urbanization, the problem of water environment pollution in my country has become more and more prominent. Although environmental protection laws and regulations have become stricter in recent years, law enforcement has been strengthened, and environmental conditions have improved year by year, the total amount of pollution discharge is still huge. According to reports, in 2012 The annual national total discharge of boiling water is 68.46 billion tons, the total discharge of chemical oxygen demand is 24.237 million tons, and the total discharge of ammonia nitrogen is 2.536 million tons. [0003] Due to its rich pore structure and large specific surface area, and zeolite's strong ion exchange capacity,...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28
CPCB01J20/20C02F1/281
Inventor 邢泽炳刘德元肖东冯晓燕孙凤坤王俊龙吴晓东
Owner SHANXI AGRI UNIV
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