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Kitchen garbage and CO2 source hydrothermal synergistic conversion method

A kitchen waste and CO2 technology, applied in chemical instruments and methods, separation methods, preparation of organic compounds, etc., to achieve the effects of no secondary pollution, simple process, and reduced process cost

Pending Publication Date: 2021-09-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Kitchen waste and CO 2 The research on co-transformation of two kinds of carbonaceous wastes has not been reported so far

Method used

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  • Kitchen garbage and CO2 source hydrothermal synergistic conversion method
  • Kitchen garbage and CO2 source hydrothermal synergistic conversion method
  • Kitchen garbage and CO2 source hydrothermal synergistic conversion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1: Starch, cellulose, protein and CO respectively 2 hydrothermal co-conversion

[0055] In this embodiment, the model compound of kitchen waste is taken as a representative, and it is combined with CO 2 Research on hydrothermal synergistic conversion. First, prepare starch, cellulose, and protein aqueous solutions with a water:solid ratio of 10:1, fill them into the reactor to make the filling rate 40%, and then pass CO into the reactor through the air valve. 2 , where the carbon content of kitchen waste model compounds: CO 2=1:20 molar ratio, then add a certain amount of NaOH and let stand for 5-10 hours to make the pH=9, then seal the reactor, react at 350°C for 3 hours and then cool down rapidly. The liquid phase product after the reaction is analyzed by gas chromatography (GC-MS), and the GC-MS figure of product analysis gained is as follows figure 1 , 2 , 3, carry out high-performance liquid chromatography (HPLC) analysis after liquid phase constant...

Embodiment 2

[0056] Example 2: Green vegetables and CO 2 hydrothermal co-conversion

[0057] In this example, green vegetables are selected as a representative of kitchen waste to study its relationship with CO 2 Hydrothermal synergistic conversion. First, the vegetables are simply crushed, then the vegetables and water are mixed (the ratio of solid to liquid mass of the vegetables and water is 1:10) and put into the reactor, accounting for 40% of the volume of the reactor, and then CO is introduced into the reactor through the air valve. 2 , of which the carbon content of green vegetables: CO 2 =1:20 molar ratio, then add a certain amount of NaOH and let it stand for 5-10 hours to make the pH=9, then seal the reactor. After reacting at 350° C. for 3 hours, it was rapidly cooled. After the liquid phase product after the reaction was constant volume, it was analyzed by high-performance liquid chromatography (HPLC), and the gas phase was sampled and analyzed by GC-TCD. The obtained GC-TC...

Embodiment 3

[0058] Example 3: Rice and CO 2 hydrothermal co-conversion

[0059] As one of the components with higher content in kitchen waste, leftover rice is one of the typical model compounds of kitchen waste. In this example, mix cooked rice and water after pulverization (the solid-to-liquid mass ratio of rice and water is 1:10) and fill it into the reactor, accounting for 40% of the volume of the reactor, and then pass CO into the reactor through the air valve. 2 , the carbon content of leftover rice: CO 2 =1:20 molar ratio, then add a certain amount of NaOH and let it stand for 5-10 hours to make the pH=9, then seal the reactor. After reacting at 350° C. for 3 hours, it was rapidly cooled. After the liquid phase product after the reaction was constant volume, it was analyzed by high-performance liquid chromatography (HPLC), and the gas phase was sampled and analyzed by GC-TCD. The obtained GC-TCD and HPLC were quantified by the standard curve method, and the CO was calculated. 2...

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Abstract

The invention relates to a kitchen garbage and CO2 source hydrothermal synergistic conversion method, which comprises the following steps: mixing kitchen garbage and water, and adding the mixture into a hydrothermal reactor, wherein the volume of the mixed kitchen garbage and water accounting for 35-50% of the volume of the hydrothermal reactor; adding a CO2 source into the hydrothermal reactor for hydrothermal reaction, wherein the molar ratio of the carbon content to the CO2 source of the kitchen garbage is 1: (10-30), the pH value of the hydrothermal reaction is 8-10, and the reaction temperature is 280-380 DEG C; and after the reaction is carried out for 2-4 hours, the CO2 source is reduced into formic acid by the kitchen garbage, and the kitchen garbage is converted into at least one of formic acid, acetic acid, lactic acid and a nitrogen-containing compound.

Description

technical field [0001] The invention relates to a kitchen waste and CO 2 A method for synergistic transformation of source water and heat, specifically involving the use of kitchen waste as a reducing agent, CO 2 As an oxidant, the hydrothermal reduction of CO 2 The invention relates to a method for synchronously oxidizing kitchen waste into high value-added chemicals, and belongs to the technical field of chemical and biomass waste recycling. Background technique [0002] CO 2 Climate anomalies and their hazards caused by excessive emissions have become one of the most concerned environmental issues in the world. Reducing atmospheric CO 2 Concentration is the consensus of all mankind. my country surpassed the United States in 2005 to become the world's largest CO 2 At the same time, my country made a commitment at the 75th session of the United Nations General Assembly to achieve CO2 emissions by 2030. 2 peak emissions and strive towards carbon neutrality by 2060, so ...

Claims

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Application Information

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IPC IPC(8): C07C51/00C07C53/02C07C53/08C07C59/08B01D53/62B01D53/80B01D53/60
CPCC07C51/00B01D53/62B01D53/80B01D53/60B01D2251/21B01D2257/504C07C53/02C07C53/08C07C59/08
Inventor 金放鸣杨阳钟恒
Owner SHANGHAI JIAO TONG UNIV
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