A method for co-producing ester-rich pyrolysis oil and activated carbon through microwave depolymerization of discarded filter tips

A filter and pyrolysis oil technology, which is applied in the field of waste resource utilization, can solve the problems of waste cigarette filters polluting the environment and being unable to be effectively used, and achieve the effect of improving technical economy

Active Publication Date: 2020-10-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for microwave-assisted depolymerization of discarded cigarette filters to co-produce ester-rich pyrolysis oil and activated carbon. The method promotes the efficient conversion of waste cigarette filters into the main product - pyrolysis oil rich in high-value esters and the by-product - activated carbon with high specific surface area, and promotes the efficient reduction, harmlessness and resource conversion of waste cigarette filters Utilization of added value realizes the transformation of discarded cigarette filters into treasure

Method used

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  • A method for co-producing ester-rich pyrolysis oil and activated carbon through microwave depolymerization of discarded filter tips

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Experimental program
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Effect test

Embodiment 1

[0031] Put 10g of discarded cigarette filters in a microwave reactor, pre-introduce nitrogen gas with a flow rate of 50mL / min for 10 minutes, then pass nitrogen gas through a Montessori scrubber bottle filled with methanol, and pass nitrogen gas carrying methanol into the reaction system for 3 minutes , The methanol carrying capacity is 5mg / min. Then turn on the microwave reactor, the microwave frequency is 2.45GHz, the microwave power is 100W, the temperature is raised to 120°C, and the heat is kept for 1 minute; then the microwave power is adjusted to 600W, the temperature is raised to 250°C, and the heat is kept for 30 seconds. The primary pyrolysis oil was collected under the same conditions. Continue to increase the microwave power to 1000W, raise the temperature to 550°C, and keep it warm for 5 minutes. The generated secondary pyrolysis steam is collected at -35°C to obtain secondary pyrolysis oil; reduce the microwave power to 200W to reduce the carrying capacity of met...

Embodiment 2

[0033] Put 10 g of discarded cigarette filters in a microwave reactor, pre-flow nitrogen with a flow rate of 200mL / min for 5 minutes, then pass the nitrogen through a Montessori gas scrubber bottle filled with methanol, and pass the nitrogen carrying methanol into the reaction system for 1 minute , The methanol carrying capacity is 200mg / min. Then turn on the microwave reactor, the microwave frequency is 2.45GHz, the microwave power is 150W, the temperature is raised to 180°C, and the heat is kept for 5 minutes; then the microwave power is adjusted to 800W, the temperature is raised to 350°C, and the heat is kept for 2 minutes, and the generated primary pyrolysis steam is at 5°C The primary pyrolysis oil was collected under the same conditions. Continue to increase the microwave power to 1500W, raise the temperature to 600°C, and keep it warm for 15 minutes. The generated secondary pyrolysis steam is collected at -20°C to obtain secondary pyrolysis oil; reduce the microwave po...

Embodiment 3

[0035]Put 10 g of discarded cigarette filters in a microwave reactor, pre-feed nitrogen gas with a flow rate of 100 mL / min for 8 minutes, then pass nitrogen gas through a Montessori gas scrubber bottle filled with methanol, and pass nitrogen gas carrying methanol into the reaction system for 2 minutes , The methanol carrying capacity is 50mg / min. Then turn on the microwave reactor, the microwave frequency is 2.45GHz, the microwave power is 120W, the temperature is raised to 150°C, and the heat is kept for 3 minutes; The primary pyrolysis oil was collected under the same conditions. Continue to increase the microwave power to 1300W, raise the temperature to 580°C, and keep it warm for 10 minutes. The generated secondary pyrolysis steam is collected at -25°C to obtain secondary pyrolysis oil; reduce the microwave power to 300W to reduce the carrying capacity of methanol in nitrogen The temperature is 5 mg / min, the temperature is raised to 700 ° C, and after 60 minutes of heat p...

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Abstract

The invention discloses a method for co-producing ester-rich pyrolytic oil and activated carbon through microwave-assisted depolymerization of a waste cigarette filter, the waste cigarette filter is put in a microwave reactor, nitrogen is introduced in advance to discharge the air in a reaction system, then the nitrogen goes through a vessel filled with methyl alcohol, the nitrogen carrying methylalcohol is introduced into the reaction system, and the waste cigarette filter is efficiently transformed into high-additional-value ester-rich pyrolytic oil and activated carbon through multiple stages of reactions. The method promotes the efficient reduction, harmless treatment, resource recycling and the high-additional-value utilization of the waste cigarette filter, and the waste cigarette filter is turned from waste into wealth.

Description

technical field [0001] The invention belongs to the field of resource utilization of waste, and in particular relates to a method for microwave-assisted depolymerization and co-production of ester-rich pyrolysis oil and activated carbon of discarded cigarette filter tips. Background technique [0002] Over six trillion cigarettes are produced in the world every year, and more than 1.2 million tons of discarded cigarette filter (cigarette butts) garbage will be generated every year. And with the rapid growth of the number of smokers all over the world, the amount of cigarette butt waste has increased dramatically. Cigarette butts may be small in size, but the harm they pose to the environment is no small matter. Cigarette filters absorb more than 4,000 types of chemical components in cigarettes, including tar, carbon monoxide and other harmful substances, and the cellulose acetate used to make filters is a plastic material that is difficult to decompose by nature. With the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/00C01B32/324
CPCC10B53/00C01B32/324Y02E50/30
Inventor 王文亮唐宁黄佳乐时宇杰党泽攀陈珊珊
Owner SHAANXI UNIV OF SCI & TECH
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