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With ionic liquids and supercritical co 2 Biomass electrochemical liquefaction method and device as medium

A technology of ionic liquid and liquefaction device, which is applied in the field of biomass regeneration and energy utilization, can solve the problems of weakened hydrogen bond and unformed system, and achieve the effects of promoting biomass cracking, increasing electrical conductivity, and uniform heating

Active Publication Date: 2017-07-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent 201410251337.X "CO 2 Supercritical fluid carrying ionic liquid to improve the solubility of cellulose" proposed the use of supercritical CO 2 The swelling and osmotic effect of the ionic liquid allows the ionic liquid to enter the surface and interior of the cellulose, so that the ionic liquid forms a hydrogen bond with the hydroxyl groups on the cellulose, and weakens the hydrogen bond between the cellulose molecules or within the molecule, which is more conducive to the dissolution of cellulose , but it does not form a systematic biomass cracking method

Method used

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  • With ionic liquids and supercritical co <sub>2</sub> Biomass electrochemical liquefaction method and device as medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: with [Bmim]Cl-supercritical CO 2 As the medium, the porous plate-shaped Fe-Mo alloy hydrogen evolution electrode is the reactor cathode, the carbon fiber electrode is the anode, and the Al 2 o 3 The preparation method of pine wood liquefaction bio-oil as catalyst is as follows:

[0027] Such as figure 1 As shown, the device used in this embodiment includes mixer 1, CO 2 Gas tank 2, cracking reactor 3, solid-liquid separator 4, ionic liquid storage tank 5, solid collector 6, condenser 7, liquid collector 8, gas collector 9, transfer pump 10, mixer 1 through cracking reaction Device 3 is connected with condenser 7, and condenser 7 is connected with liquid collector 8, gas collector 9 respectively, and cracking reactor 3 bottom is connected with solid-liquid separator 4, and solid-liquid separator 4 is conveyed through ionic liquid storage tank 5 The pump 10 is connected, and the transfer pump 10 is connected to the cracking reactor 3 to form a loop, and ...

Embodiment 2

[0030] Embodiment 2: with [Amim]Br-supercritical CO 2 Tobacco leaf liquefied bio-oil was prepared as the medium, the plate-shaped activated carbon electrode as the reactor cathode, the mesh titanium electrode as the anode, and NaCl as the catalyst:

[0031] The structure of the device used in this embodiment is the same as in Embodiment 1;

[0032] Mix 23kg of dried tobacco leaf powder with a particle size of 35 mesh and 1.15kg of catalyst NaCl in the mixer, unscrew the valve after stirring evenly, put the mixture into the cracking reactor, and then add 345L of water and 57.5kg of ionic liquid [Amim] Br, close the valve, the CO 2 Pass it into the pyrolysis reactor, seal it and raise the temperature to 180°C, increase the pressure to 11MPa, and feed the anode of the reactor with an AC voltage of 45V. When the pyrolysis of biomass begins to produce gas and overpressure, the automatic exhaust valve will automatically exhaust the constant pressure. This state is maintained for 0...

Embodiment 3

[0033] Embodiment 3: with [Emim]OTf-supercritical CO 2 As the medium, the porous plate-shaped Pt-Ce alloy hydrogen evolution electrode is the reactor cathode, the rod-shaped aluminum electrode is the anode, and the NiCl 3 The corn stover liquefied bio-oil as catalyst was prepared as follows:

[0034] The structure of the device used in this embodiment is the same as in Embodiment 1;

[0035] 18kg of dried corn stalk powder with a particle size of 48 mesh and 0.9kg of catalyst NiCl 3 Mix in the mixer, unscrew the valve after stirring evenly, put the mixture into the cracking reactor, then add 270L water and 54kg ionic liquid [EMIM]OTf, close the valve; 2 Pass it into the pyrolysis reactor, seal it and raise the temperature to 210°C, increase the pressure to 9.5MPa, and pass an AC voltage of 0.8V to the cathode and anode of the reactor, and the automatic exhaust valve will automatically exhaust when the biomass pyrolysis starts to produce gas and overpressure Constant pressur...

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Abstract

The invention relates to an electrochemical liquefaction method and device for biomass taking ionic liquid and supercritical CO2 as media. According to the method disclosed by the invention, the supercritical CO2 is taken as a medium, the biomass is treated in the presence of a catalyst, ionic liquid and water, and hydrogen is supplied by electrolysis of water to promote the biomass to be cracked into a bio-oil product; in the method, the biomass is uniformly heated, chemical bonds of lignocellulose are broken to generate an ionic pair intermediate and is subjected to electric field stimulation to quicken the cracking speed with high efficiency, the process is easy to control, and the utilization ratio of the biomass is increased; free hydrogen is supplied by continuous electrolysis of water to timely cut off a free radical chain reaction, such that the yield of a liquid fuel is effectively increased and the quality of the liquid fuel is improved; the supercritical CO2 is well dissolved in the ionic liquid, such that the viscosity of the ionic liquid is remarkably reduced, the conductivity of the ionic liquid is improved, and biomass cracking is effectively promoted.

Description

technical field [0001] The invention relates to the technical field of biomass regeneration and utilization and its energy conversion, in particular to an electrolyzed water for hydrogen supply and an ionic liquid-supercritical CO 2 A method and device for preparing bio-oil by electrochemical liquefaction of biomass as a medium. Background technique [0002] At present, petroleum resources are becoming increasingly heavy and inferior. Heavy and inferior petroleum is mainly produced through coking, catalytic cracking or hydrocracking to produce light distillate oil. Due to the poor quality of raw materials, the processing cost is relatively high. Biomass is widely distributed, with huge output, low sulfur and nitrogen content, clean and pollution-free, and it is the only renewable resource containing carbon and hydrogen that can be used to prepare gasoline and diesel. Compared with coal, oil, natural gas and other fossil energy sources, it has outstanding advantages. advanta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/06
CPCC10G1/06C10G2300/1011C10G2300/1014
Inventor 瞿广飞赵茜李军燕宁平谷俊杰
Owner KUNMING UNIV OF SCI & TECH
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