Method for simultaneously preparing phenol-rich biomass oil and biomass charcoal for adsorbing heavy metal ions by microwave pyrolysis of poplar sawdust

A technology for adsorbing heavy metals and biomass oil, which is applied in the field of comprehensive utilization of resources, can solve the problems of low resource utilization, only consider or ignore the comprehensive utilization of biomass oil and biomass carbon, etc., to achieve recycling, clean performance, and The effect of alleviating the pressure on resources and the environment

Inactive Publication Date: 2019-11-22
KUNMING UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

However, only the utilization of biomass gas products is considered, while the comprehensive utilization of biomass oil and biomass carbon is ignored, and the utilization rate of resources is greatly reduced.

Method used

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  • Method for simultaneously preparing phenol-rich biomass oil and biomass charcoal for adsorbing heavy metal ions by microwave pyrolysis of poplar sawdust
  • Method for simultaneously preparing phenol-rich biomass oil and biomass charcoal for adsorbing heavy metal ions by microwave pyrolysis of poplar sawdust
  • Method for simultaneously preparing phenol-rich biomass oil and biomass charcoal for adsorbing heavy metal ions by microwave pyrolysis of poplar sawdust

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: A kind of method of microwave pyrolysis poplar sawdust simultaneously prepares the biomass oil rich in phenol and is used for absorbing the biochar of heavy metal ion, concrete steps are as follows:

[0026] (1) Poplar sawdust was crushed, placed in a nitrogen atmosphere at 400°C for 30 minutes to obtain pyrolysis gas and pyrolysis solids, and the pyrolysis solids were cooled to obtain biochar; the microwave power was 1500W, and the nitrogen flow rate was 300 mL / min;

[0027] (2) Pass the pyrolysis gas in step (1) into a condensation pipe connected to a circulating condensation pump at a temperature of -5°C to quickly condense and separate to obtain liquid biomass oil and biomass gas fuel;

[0028] The GC-MS collection of illustrative plates of present embodiment biomass oil composition sees figure 1 ,from figure 1 It can be seen that the peak value of biomass oil is less, which means that there are fewer components, which highlights the advantages of mi...

Embodiment 2

[0031] Embodiment 2: A kind of method of microwave pyrolysis poplar sawdust simultaneously prepares the biomass oil rich in phenol and is used for absorbing the biochar of heavy metal ion, and concrete steps are as follows:

[0032] (1) Poplar sawdust was crushed, placed in a nitrogen atmosphere at a temperature of 500°C for 45 minutes to microwave pyrolysis to obtain pyrolysis gas and pyrolysis solids, and the pyrolysis solids were cooled to obtain biochar; the microwave power was 1000W, and the nitrogen flow rate was 200mL / min;

[0033] (2) Pass the pyrolysis gas in step (1) into a condensation pipe connected to a circulating condensation pump at a temperature of -1°C to quickly condense and separate to obtain liquid biomass oil and biomass gas fuel;

[0034] In this embodiment, the content of phenol in the liquid biomass oil is 49.05%, and CO and H in the biomass gaseous fuel are measured by gas chromatography. 2 The total volume content of biochar is 57.19%, and the spec...

Embodiment 3

[0036] Embodiment 3: A kind of method of microwave pyrolysis poplar sawdust simultaneously prepares the biomass oil rich in phenol and is used for absorbing the biochar of heavy metal ion, and concrete steps are as follows:

[0037] (1) Poplar sawdust was crushed and placed in a nitrogen atmosphere at 600°C for microwave pyrolysis for 60 minutes to obtain pyrolysis gas and pyrolysis solids, and the pyrolysis solids were cooled to obtain biochar; the microwave power was 2000W, and the nitrogen flow rate was 400mL / min;

[0038] (2) Pass the pyrolysis gas in step (1) into a condensation pipe connected to a circulating condensation pump at a temperature of -3°C to quickly condense and separate to obtain liquid biomass oil and biomass gas fuel;

[0039] The scanning electron micrograph of the present embodiment biochar is shown in image 3 ,from image 3It can be seen that the surface of biomass charcoal under this pyrolysis condition is smooth and has uniform pores;

[0040] T...

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Abstract

The invention relates to a method for simultaneously preparing phenol-rich biomass oil and biomass charcoal for adsorbing heavy metal ions by microwave pyrolysis of poplar sawdust, and belongs to thetechnical field of comprehensive utilization of resources. The method comprises the following steps: crushing poplar sawdust, placing the crushed poplar sawdust in a nitrogen atmosphere, carrying outmicrowave pyrolysis at 400-600 DEG C for 30-60 min to obtain pyrolysis gas and pyrolysis solid, and cooling the pyrolysis solid to obtain biomass charcoal; and introducing the pyrolysis gas into a reaction kettle at the temperature of -1 to -5 DEG C, and carrying out rapid condensation separation to obtain liquid biomass oil and biomass gas fuel. The biomass charcoal is rich in functional groups,and has relatively large adsorption capacity on lead and cadmium in wastewater; according to the method, poplar sawdust is used as a raw material, biomass oil, biomass gas fuel and biomass charcoal which are high-added-value products are prepared through microwave pyrolysis, and the purposes of comprehensive utilization of waste resources and treatment of waste with waste are achieved.

Description

technical field [0001] The invention relates to a method for simultaneously preparing phenol-rich biomass oil and biomass charcoal for absorbing heavy metal ions by microwave pyrolysis of poplar sawdust, and belongs to the technical field of comprehensive utilization of resources. Background technique [0002] With the depletion of fossil energy, human beings have to face the increasingly serious energy crisis and chemical resource crisis, and the search for clean and renewable energy and green chemicals has become the focus of research in various countries; at the same time, with the rapid growth of the economy, the environment The problem is becoming more and more prominent, especially the pollution of heavy metal wastewater. Biomass resources, as a cheap, easy-to-obtain and widely sourced renewable resource, have great potential for development and application. Researchers from all over the world have conducted active exploration and experimental research on the utilizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/20C10B53/02
CPCB01J20/20B01J2220/4825C10B53/02Y02E50/10
Inventor 夏洪应程松张利波彭金辉胡文海陈权
Owner KUNMING UNIV OF SCI & TECH
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