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Method for electrochemically preparing micro-nano carbon spheres from biomass pyrolytic oil

A biomass pyrolysis oil, micro-nano carbon sphere technology, applied in chemical instruments and methods, microsphere preparation, chemical/physical processes, etc., can solve the problems of low yield of carbon material products, carbon loss, etc. Low, simple process effect

Active Publication Date: 2021-11-30
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, one of the major challenges in the preparation of carbon materials by thermochemical methods is the release of large amounts of volatiles during heat treatment leading to carbon loss, resulting in low yields (less than 30%) of carbon material products.
However, there has been no research on the electrochemical preparation of carbon materials using biomass pyrolysis oil as a raw material

Method used

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  • Method for electrochemically preparing micro-nano carbon spheres from biomass pyrolytic oil
  • Method for electrochemically preparing micro-nano carbon spheres from biomass pyrolytic oil
  • Method for electrochemically preparing micro-nano carbon spheres from biomass pyrolytic oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment specifically includes the following steps:

[0040] (a) Add 0.1 mol / L LICL to methanol to support the electrolyte, and then mix the biomass hottelling oil and methanol to mix the mass ratio of 19: 1, mixed liquid as a precursor solution; the thermal solution is the rice shell Pyrolysis under 600 ° C.

[0041] (b) Prepare a single chamber electrolytic cell, a precursor solution is placed in an electrolytic cell, and two electrodes are inserted into the solution, which is an anode electrode and a cathode electrode, and a current circuit is formed; in this example, a platinum sheet is used as a cathode electrode. , Platinum wire as an anode electrode, platinum sheet and platinum split surface area is 1 cm 2 , Electrode connection with DC power supply;

[0042] (c) After 15 minutes of nitrogen in the electrolytic cell, open the DC power supply, and 50mACM is fixed. -2 The reaction temperature is 25 ° C, and the electrochemical preparation process is started by...

Embodiment 2

[0046] The current density used in this example is 150mAcm -2 The timing electrode cleaning interval is set to 10 min, and the remaining conditions are the same as in Example 1. The mass of the micro-tank carbon ball is approximately 77% of the pyrolytic oil mass in the electrochemical reactor, and most of the carbon ball particles are 2-3 μm.

Embodiment 3

[0048] The current density used in this example is 200mAcm -2 The timing electrode cleaning interval is set to 7 min, and the remaining conditions are the same as in Example 1. The mass of the micro-tank carbon ball is approximately 67% of the pyrolytic oil mass in the electrochemical reactor, and most of the carbon balls are 2-3 μm.

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Abstract

The invention belongs to the field of biomass energy utilization, and discloses a method for electrochemically preparing micro-nano carbon spheres from biomass pyrolytic oil. The method comprises the following steps of: (S1) obtaining a precursor solution from biomass pyrolytic oil; (S2) putting the precursor solution into an electrochemical reactor, and inserting an electrode at the same time; (S3) starting an electrochemical reaction to enable a carbon-containing component in the biomass pyrolysis oil to form a micro-nano spherical structure; and cleaning solid attachments which are obtained by the reaction and are attached to the surface of the electrode into a precursor solution phase at a preset time interval; and (S4) collecting the precursor solution phase after the reaction, carrying out solid-liquid separation, collecting solids, and drying the solids to obtain the product micro-nano carbon spheres. According to the invention, the overall process design and the like of the method are improved, such that the problem of low yield of a carbon material product obtained from biomass oil can be effectively solved, and the biomass pyrolysis oil can be adopted as the raw material to prepare the micro-nano carbon spheres by using an electrochemical reaction process with a mild condition.

Description

Technical field [0001] The present invention belongs to the field of biomass, and more particularly to a method of preparing a microa-nanophotochemocytochemistry in biomass pyrolysis oil electrochemistry. Background technique [0002] The promotion and application of renewable energy is considered to promote economic development, safeguarding energy supply and alleviating global warming fossil energy alternatives. Among them, biomass energy distribution is wide, rich in reserves is the only carbon-containing renewable resource. my country has used biomass resource utilization as a comprehensive strategy to achieve the goals and rural rejuvenation in 2060 carbon. Biomass can be converted into pyrolysis, thermal solution and pyrolysis oil by pyrolysis, pyrolyze and pyrolysis oil, and the first two can be directly utilized as fuel and soil corrosion inhibitor, and the pyrolysis oil is complex, and oxygen content is complicated. High, high viscosity, poor thermal stability, is diffic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/08B01J13/02
CPCB01J19/087B01J13/02Y02P20/133
Inventor 汪一邓伟熊哲汪雪棚陈元静向军胡松苏胜江龙徐俊
Owner HUAZHONG UNIV OF SCI & TECH