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A method for degrading polypropylene with high conversion rate driven by solar thermal-electrical coupling

A technology of solar heat and high conversion rate, applied in the direction of electrolytic components, electrolytic process, electrolytic organic production, etc., can solve the problems of high cost and low degradation rate

Inactive Publication Date: 2019-08-13
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high cost and low degradation rate existing in the degradation of polypropylene plastic waste, the present invention provides a method for degrading polypropylene with high conversion rate driven by solar thermal-electrical coupling

Method used

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  • A method for degrading polypropylene with high conversion rate driven by solar thermal-electrical coupling
  • A method for degrading polypropylene with high conversion rate driven by solar thermal-electrical coupling
  • A method for degrading polypropylene with high conversion rate driven by solar thermal-electrical coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Embodiment 1), can adopt the reaction device with following structure:

[0079] The outer layer of the reaction device is a reaction kettle made of stainless steel. The reaction kettle is divided into upper and lower parts. The upper part is a stainless steel cover. The stainless steel cover and the flange of the lower part of the reaction kettle are sealed by graphite packing. Fasten with bolts and nuts. The fastened reactor can ensure that the gas generated by the reaction does not leak. There are five channels distributed on the upper part of the flange cover, one of which can be set in the center of the flange cover as a thermocouple channel through which the thermocouple can go deep into the center of the reactant to realize real-time monitoring of the reaction temperature; in addition The two channels are symmetrically distributed along the thermocouple channel. As the electrode channel, the anode electrode and the cathode electrode can be connected to the extern...

Embodiment 6

[0099] Embodiment 6 is basically the same as Embodiment 1, the difference is:

[0100] The preset temperature of the reactor is 400°C.

[0101] The preparation methods of Examples 7 to 10 are basically the same as those of Example 6, except that the current intensities are 100mA, 200mA, 300mA, and 400mA, respectively.

[0102] image 3 The voltage changes during the degradation process of Examples 6 to 10 are shown. At 400°C, the current changes from 50mA to 400mA, and the fluctuation range of the voltage gradually increases.

[0103] Figure 4 The polypropylene conversions for Examples 6 to 10 are shown. It can be seen that at 400 °C, the conversion rate of thermal-electrical coupling degradation polypropylene is higher; when the current is increased, the improvement of the total conversion and gasification rate of the reaction is more obvious.

Embodiment 11

[0104] Example 11 is basically the same as Example 1, except that the electrolysis is carried out at a constant voltage of 1.5V.

[0105] Embodiment 12 to Embodiment 16 are basically the same as Embodiment 11, except that the preset temperatures in the reactor are 360°C, 370°C, 380°C, 390°C, and 400°C respectively.

[0106] Figure 5 The polypropylene conversions for Examples 11 to 16 are shown. It can be seen that the total conversion rate, gasification rate and liquefaction rate of polypropylene all increase with the increase of temperature.

[0107] Embodiment 17 to Embodiment 23 are basically the same as Embodiment 11, except that the dosage of polypropylene is 0.5g, 1g, 1.5g, 2.5g, 3g, 3.5g, 4g respectively.

[0108] Figure 6 The conversion ratio comparison results of Example 11, Example 17 to Example 23 are shown. It can be seen that as the dosage of polypropylene increases, the total conversion rate, gasification rate and liquefaction rate of polypropylene decrease...

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Abstract

The invention relates to a method for degrading polypropylene with a high conversion rate driven by solar heat-electric coupling, comprising the following steps: (1) drying the polypropylene, adding conductive materials and mixing them uniformly, and putting the mixed materials into a reaction device; 2) Insert the electrolysis electrode into the mixed material of the reaction device, then seal the reaction device, and use the solar heat collector to heat the sealed reaction device; (3) when the temperature in the reaction device reaches the preset temperature, use solar energy to The battery applies a constant current or constant voltage to the mixed material through the electrolysis electrode to perform electrolysis; (4) stop heating and electrolysis, and cool the reaction device to complete the degradation. Use solar energy to degrade polypropylene to achieve green, clean and sustainable degradation of waste plastics, and the degradation efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of polymer degradation, in particular to a method for degrading polypropylene with high conversion rate driven by solar thermal-electrical coupling. Background technique [0002] Polypropylene accounts for a large proportion of discarded plastic waste. The traditional pyrolysis method has the characteristics of energy consumption and low value of products. Although the molecular sieve catalytic degradation method can improve the distribution of products and reduce the reaction temperature, there are also problems such as energy consumption and expensive catalysts. [0003] Solar energy is a clean, green and renewable energy source. In the current severe situation of environmental protection and energy crisis, if solar energy can be used as an energy source to degrade polypropylene, it will undoubtedly greatly reduce the cost of plastic waste disposal. Contents of the invention [0004] (1) Technical pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/10C25B11/02C25B11/04C25B15/00C25B3/29
CPCC25B11/02C25B11/04C25B15/00C25B3/29Y02P20/133
Inventor 姜婷婷谷笛江泓朱凌岳赵许乐王宝辉
Owner NORTHEAST GASOLINEEUM UNIV
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