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Electrochemical upgrading method for bio-oil

An electrochemical and bio-oil technology, which is applied in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problems of poor thermal stability of bio-oil, difficult reactions, and reduced upgrading efficiency, and achieves no coking, carbon deposits, acid The effect of content reduction, suitability for transportation and storage

Active Publication Date: 2020-11-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal stability of bio-oil is poor, and it is easy to coke and form carbon deposits when heated, which will cause reactor blockage or catalyst deactivation, reduce the upgrading efficiency, and even make the reaction difficult to carry out

Method used

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  • Electrochemical upgrading method for bio-oil
  • Electrochemical upgrading method for bio-oil
  • Electrochemical upgrading method for bio-oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment specifically includes the following steps:

[0044] (a) first add 0.1mol / L LiCl supporting electrolyte to methanol, then mix bio-oil and methanol at a mass ratio of 4:1, and the mixed liquid is used as catholyte for standby;

[0045] (b) configuration concentration is the dilute sulfuric acid solution of 0.5mol / L as anolyte standby;

[0046] (c) Assembly of electrochemical reactor: prepare H-type electrolytic cell, separate it with Nafion-117 cation exchange membrane in the middle, put catholyte and anolyte into both sides of H-type electrolytic cell respectively, and insert platinum in catholyte A sheet electrode, a platinum sheet electrode is inserted in the anolyte, and the electrode is connected with a constant current meter;

[0047] (d) After 15 minutes of passing nitrogen gas into the catholyte side, turn on the power supply, set a constant current of 50 mA, a reaction temperature of 20° C., and a reaction time of 8 hours to realize bio-oil upgra...

Embodiment 2

[0052] The concentration of dilute sulfuric acid in the anolyte used in this embodiment is 0.2 mol / L, and other conditions are the same as those in Embodiment 1. After upgrading for 8 hours, the content of acetic acid in bio-oil decreased by 26.7%, the content of aromatic components decreased by 34.1%, and the molecular weight of bio-oil decreased.

Embodiment 3

[0054] This embodiment specifically includes the following steps:

[0055] (a) First add 0.1mol / L Bu to methanol 4 NBF 4 supporting electrolyte, and then mix bio-oil and methanol at a mass ratio of 6:1, and the mixed liquid is used as catholyte for standby;

[0056] (b) configuration concentration is the dilute sulfuric acid solution of 0.5mol / L as anolyte standby;

[0057] (c) Assembly of electrochemical reactor: prepare H-type electrolytic cell, separate it with Nafion-117 cation exchange membrane in the middle, put catholyte and anolyte into both sides of H-type electrolytic cell respectively, insert carbon into catholyte For the ruthenium-based electrode, a platinum sheet electrode is inserted into the anolyte, and the electrodes are connected by a galvanostat; the carbon-based ruthenium electrode is prepared by electroplating (the specific process of the electroplating method can directly refer to relevant prior art).

[0058] (d) After feeding nitrogen into the cathol...

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Abstract

The invention belongs to the field of biomass energy utilization, and discloses a bio-oil electrochemical upgrading method which comprises the following steps: (a) mixing bio-oil, an organic solvent and a supporting electrolyte to obtain a catholyte; (b) preparing an acid solution as an anolyte; (c) constructing an electrochemical reactor by adopting the catholyte and the anolyte and separating the catholyte from the anolyte through one or two ion exchange membranes, thus forming a current loop; and (d) introducing a protective gas into one side of the catholyte, and introducing current through the working electrode and the anode electrode to carry out electrochemical reaction, thereby realizing the electrochemical upgrading of the bio-oil. Compared with the prior art, the problem that carbon deposition is easily formed when the bio-oil is upgraded by a thermochemical method can be effectively solved, the bio-oil is subjected to electrochemical upgrading under mild conditions, and thecontent of bio-oleic acid, the content of aromatic components and the content of heavy components can be reduced by upgrading, so that the bio-oil is suitable for transportation and storage; and meanwhile, carbon deposition is avoided in the upgrading process.

Description

technical field [0001] The invention belongs to the field of biomass energy utilization, and more specifically relates to a method for electrochemically upgrading bio-oil. Background technique [0002] Bio-oil, the pyrolysis product of biomass, is the only carbon-containing renewable energy source in liquid form. Compared with biomass, bio-oil has a high energy density, usually up to 10 times the energy density of biomass. Converting biomass into bio-oil is a promising low-cost utilization of biomass energy. However, there is still no mature industrial application or treatment technology for bio-oil. The root cause of the intractability and application of bio-oil is its unique physical and chemical properties. Bio-oil has complex components, high acid value, high viscosity, and corrosiveness, making it difficult to carry out large-scale transportation and storage. Bio-oil has high oxygen content, many heavy components (high molecular weight), and low calorific value, mak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/02
CPCC10L1/02
Inventor 汪一邓伟熊哲汪雪棚彭丹陈元静向军胡松苏胜江龙
Owner HUAZHONG UNIV OF SCI & TECH
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