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A method for catalyzing biomass pyrolysis using heat treatment products of waste lithium batteries
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A waste lithium battery and biomass pyrolysis technology, which is applied in special forms of dry distillation, coke oven, petroleum industry, etc., can solve the problems of short cycle life, increase yield, reduce oxygen-containing compound content, and increase H2O content Effect
Active Publication Date: 2022-04-15
CHONGQING UNIV
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Problems solved by technology
However, the lithium-ion battery itself has a short cycle life, and a large number of waste lithium-ion batteries will be produced every year.
Method used
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Embodiment 1
[0023] Embodiment 1, a method for utilizing waste lithium battery heat treatment products to catalyze biomass pyrolysis, the method comprises the following steps:
[0024] Step 1, pretreating the waste lithium battery to obtain cathode and anode electrode materials of the waste lithium battery; specifically: first removing the hard shell of the waste lithium battery, grinding, and sieving to obtain the cathode and anode electrode materials.
[0025] Step 2: Pyrolyzing the cathode and anode electrode materials to obtain electrode material heat treatment products, namely mixed metal element and oxide, the main components of which include Ni, Co, Mn and Fe.
[0026] Step 3, using wheat straw as the original biomass, mix the wheat straw with the electrode material heat treatment product, and mix the mixed sample at 500°C under the carrier gas N 2 When the flow rate is 300mL / min, pyrolysis is rapid until the reaction is complete. The yield of bio-oil collected was 47.13%, and the ...
Embodiment 2
[0027] Embodiment 2 is different from Embodiment 1:
[0028] Step 3: Taking wheat straw as the biomass as it is, mixing the wheat straw and the electrode material heat treatment product, and mixing the mixed sample at 600°C under the carrier gas N 2 When the flow rate is controlled at 1000mL / min, pyrolysis is rapid until the reaction is complete. The collected bio-oil yield was 46.35%. The chemical composition of the bio-oil was analyzed, and the ester content was only 8.08%, and the hydrocarbon content rose to 5.77%. H in the test gas product composition 2 The concentration ratio is 26.02%, and the generated H 2 The total mass is 3.73 mg / g wheat straw.
Embodiment 3
[0029] Embodiment 3 is different from Embodiment 1:
[0030] Step 3, using rice straw as biomass, mix rice straw and electrode material heat treatment product, and mix the sample at 400°C under carrier gas N 2 When the flow rate is controlled at 100mL / min, pyrolysis is rapid until the reaction is complete. The collected bio-oil yield was 42.74%. The chemical composition of the bio-oil was analyzed, and the ester content was only 9.61%, and the hydrocarbon content rose to 9.29%. H in the test gas product composition 2 The concentration ratio is 17.53%. Generated H 2 The total mass is 1.66 mg / g rice straw.
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Abstract
The invention discloses a method for catalyzing biomass pyrolysis by utilizing heat treatment products of waste lithium batteries, which is characterized in that the method comprises the following steps: step 1, pretreating waste lithium batteries to obtain cathode and anode electrode materials of waste lithium batteries ; Step 2, pyrolyzing the cathode and anode electrode materials to obtain heat-treated products of the electrode materials; Step 3, mixing the biomass and the heat-treated products of the electrode materials in a certain proportion, and then performing rapid pyrolysis of the mixture under an inert atmosphere, and collecting after cooling The bio-oil, coke and gas products produced by pyrolysis can obtain high-quality bio-oil and gas products; the invention directly uses the heat treatment products of waste lithium batteries as the catalyst for biomass pyrolysis, and improves the production efficiency while recycling and processing waste lithium batteries. The yield rate of material oil can be widely used in energy, environmental protection and other fields.
Description
technical field [0001] The invention relates to the fields of biomass energy utilization and waste lithium battery recycling industry, in particular to a method for catalyzing biomass pyrolysis by using waste lithium battery heat treatment products. Background technique [0002] Due to the excessive exploitation and utilization of fossil energy, the energy crisis and a large number of environmental pollution problems have been caused. Researchers are looking for alternatives to fossil fuels to meet the growing demand for fuels and chemicals. Biomass energy has been widely valued by countries all over the world due to its characteristics of recycling, renewability, environmental friendliness, and large reserves. Biomass is one of the most important renewable energy resources, second only to the three traditional fossil energy sources of coal, oil, and natural gas, and it accounts for 10-15% of the world's total energy consumption. Moreover, biomass is a raw material with ze...
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Application Information
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