Treatment and application method of nut waste

An application method and waste technology, applied in the field of nut waste treatment and application, can solve the problems of low calorific value, unstable chemical properties and high cost of bio-oil

Pending Publication Date: 2021-07-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If these biomass (such as nut waste) are used to catalyze pyrolysis to prepare liquid fuel, the energy crisis and environmental problems can be greatly alleviated, but there are still many problems, such as the bio-oil obtained by pyrolysis contains a large amount of oxygenated compounds , acids, phenols, etc., causing problems such as low calorific value and unstable chemical properties of bio-oil
Existing research generally uses high-pressure hydrogen and noble metal catalysts to catalytically upgrade the obtained bio-oil, but compared to the degree of upgrading, the cost is relatively high

Method used

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  • Treatment and application method of nut waste
  • Treatment and application method of nut waste
  • Treatment and application method of nut waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0036]Nitrogen gas was passed into the microwave pyrolysis furnace at a flow rate of 50ml / min for 15 minutes, and then under the conditions of microwave power of 750W and pyrolysis reaction temperature of 550°C, microwave pyrolysis of nut waste peanut shells was carried out for 15 minutes. The solid product biochar after pyrolysis was collected and put into a ball mill for 1 h at 500 r / min. Prepare 0.1mol / L hydrochloric acid: take 3.5ml of concentrated hydrochloric acid with a mass fraction of 36wt%-38wt% and mix it with 400ml deionized water, then mix the polished peanut shell biochar with the prepared hydrochloric acid solution on a magnetic stirrer Stirring was continued for 6h. Then carry out suction filtration, wash and put in the oven of 90 ℃ to carry out overnight drying. The metal salt solution configuration method is as follows: respectively weigh ferrous chloride tetrahydrate and anhydrous ferric chloride with a molar ratio of 1:2 and dissolve them in deionized wate...

Embodiment example 2

[0044] In order to quickly verify the performance of Fe-modified biochar catalysts, the pyrolysis products were analyzed by fast pyrolysis-gas chromatography-mass spectrometry (Py-GC / MS). Use an electronic balance with an accuracy of 0.1 mg to weigh a small amount of peanut shell material powder and put it into a small pyrolysis crucible, then weigh the Fe-modified biochar catalyst that is 20% of the mass of the peanut shell material and place it on the peanut shell powder. The total amount should not exceed half of the small crucible, and finally take a small ball of quartz wool to cover the material to prevent the powdery material from rushing out during rapid pyrolysis. The pyrolysis temperature was set at 550 °C and the residence time was 18 s. The interface temperature was maintained at 250°C, helium was used as the mobile phase to maintain vacuum at a flow rate of 0.5-1ml / min, and the split ratio was 1:25. A DB-5 capillary column (30 m x 0.25 mm x 0.25 μm) was used for ...

Embodiment example 3

[0047] In order to verify the effect of Fe-modified biochar catalyst on the selectivity of bio-oil components obtained by microwave pyrolysis of peanut shells, catalytic pyrolysis experiments were carried out using a combined catalytic fixed-bed reactor and microwave pyrolysis reactor. The raw material selects peanut shells, weighs a certain amount of peanut shells and activated carbon (microwave absorber) on an electronic balance and places them in a 500ml quartz flask, then places the quartz flask in a microwave pyrolysis device, and places 20% of it in a fixed bed reactor. Fe modified biochar catalyst, catalytic fixed bed reaction temperature is set to 550 °C. In order to verify the effect of Fe-modified biochar catalyst on the selectivity of bio-oil components obtained by microwave pyrolysis of peanut shells, two sets of comparative experiments were set up, one without catalyst and one with catalyst. The temperature of the microwave pyrolysis reactor was set at 550°C, and ...

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Abstract

The invention belongs to the technical field of agriculture and forestry waste biomass energy, and particularly relates to a treatment and application method of nut waste. According to the invention, a biochar catalyst is prepared by collecting biochar which is one of the products obtained by pyrolysis of nut waste, and then a modified biochar catalyst is prepared by loading cheap transition metal onto the biochar by utilizing a precipitation method. Then the modified biochar catalyst is returned to be applied to the catalytic pyrolysis reaction of the nut waste, high-quality bio-oil and charcoal are generated through the reaction, and the charcoal is modified to serve as a catalyst for the catalytic pyrolysis reaction of the nut waste, so that a circulating closed loop is formed. The mode of recycling the catalyst preparation material and the conversion product reflects the high-value full-quality utilization of the nut waste.

Description

technical field [0001] The invention belongs to the technical fields of agricultural and forestry waste biomass energy conversion, resource utilization and chemical engineering, and specifically relates to a treatment and application method of nut waste. Background technique [0002] Energy is an important material basis for the survival and development of human society. Throughout the history of the development of human society, every major progress of human civilization is accompanied by the improvement and replacement of energy. In recent years, renewable energy such as wind energy, nuclear energy, and solar energy has attracted people's attention, among which biomass (such as nut waste) is one of the most important renewable resources. These energies are stored in plants in nature. Plants use biomass as a medium to store solar energy in their bodies through photosynthesis, and the output of these biomass raw materials can reach hundreds of millions of tons per year. Ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J35/10B01J37/08B01J37/00B01J37/02B01J37/03C10L1/02
CPCB01J23/745B01J35/1019B01J35/1038B01J35/1061B01J37/0036B01J37/0201B01J37/035B01J37/082B01J37/084C10L1/02
Inventor 卜权曹梦杰陈伟甘鹏建毛罕平
Owner JIANGSU UNIV
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