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Method for preparing bio-oil by coupling biomass pyrolysis and methane aromatization

A biomass pyrolysis and aromatization technology, applied in the energy field, can solve the problems of high reaction conditions, restricted application, and high cost of hydrogen production, so as to reduce costs and achieve the effect of yield and quality.

Inactive Publication Date: 2021-02-02
赵海玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the acidic ion pretreatment method and the bipolar catalytic method have high requirements on the reaction conditions, and the sources of waste polyolefin plastics in the catalytic co-pyrolysis method are not extensive, and the bio-oil yield and quality achieved by the above methods still cannot meet the requirements; although adding The hydropyrolysis process phase can significantly improve the quality and yield of bio-oil, but the high cost of hydrogen production restricts its application in industrial production

Method used

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  • Method for preparing bio-oil by coupling biomass pyrolysis and methane aromatization
  • Method for preparing bio-oil by coupling biomass pyrolysis and methane aromatization
  • Method for preparing bio-oil by coupling biomass pyrolysis and methane aromatization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The biomass used in this example is corn stalks, and its industrial analysis and elemental analysis are shown in Table 1.

[0040] Table 1

[0041]

[0042] 1. Preparation of Mo / HZSM-5 catalyst

[0043] Immerse the ammonium molybdate solution on the HZSM-5 powder, immerse at room temperature for 18 hours, dry at 90°C for 10 hours, calcinate at 550°C for 6 hours, press into tablets, and screen out 20-40 mesh particles to obtain Mo / HZSM-5 catalyst.

[0044] 2. Preparation of bio-oil by catalytic pyrolysis

[0045] (1) crush the corn stalks and pass through a 100-mesh sieve, and then mix the two according to the mass ratio of Mo / HZSM-5 catalyst: corn stalks=5:1 to obtain a mixture;

[0046](2) The mixture is placed in a fixed-bed pyrolysis reactor, and methane gas is introduced from the inlet of the pyrolysis reactor at a gas flow rate of 60ml / min, and the catalytic pyrolysis reaction is carried out at a constant temperature of 750°C and a pressure of 0.1Mpa for 30min...

Embodiment 2

[0049] The biomass used in this example is corn stalks, and its industrial analysis and elemental analysis are shown in Table 1.

[0050] 1. Preparation of Fe / HZSM-5 catalyst

[0051] Immerse the iron nitrate nonahydrate solution on the HZSM-5 powder, soak it at room temperature for 24 hours, dry it at 80°C for 12 hours, bake it at 550°C for 6 hours, press it into tablets, and screen out 20-40 mesh particles to obtain Fe / HZSM-5 catalyst.

[0052] 2. Preparation of bio-oil by catalytic pyrolysis

[0053] (1) crush the corn stalks and pass through a 100-mesh sieve, and then mix the two according to the mass ratio of Fe / HZSM-5 catalyst: corn stalks=0.8:1 to obtain a mixture;

[0054] (2) Put the mixture in a fixed-bed pyrolysis reactor, feed methane gas from the inlet of the fixed-bed pyrolysis reactor at a gas flow rate of 36000ml / min, and carry out catalytic pyrolysis reaction at a constant temperature of 800°C and 3Mpa pressure for 200min ;

[0055] (3) The liquid products...

Embodiment 3

[0057] The biomass used in this example is wheat straw, and its industrial analysis and elemental analysis are shown in Table 2.

[0058] Table 2

[0059]

[0060] 1. Preparation of Fe / HZSM-5 catalyst

[0061] Immerse iron nitrate nonahydrate solution on HZSM-5 powder, soak at room temperature for 23 hours, dry at 79°C for 11 hours, bake at 545°C for 5.5 hours, form into tablets, screen out 20-40 mesh particles, and obtain Fe / HZSM-5 catalyst.

[0062] 2. Preparation of bio-oil by catalytic pyrolysis

[0063] (1) crush the corn stalks and pass through a 100-mesh sieve, and then mix the two according to the mass ratio of Fe / HZSM-5 catalyst: corn stalks=3:1 to obtain a mixture;

[0064] (2) The mixture is placed in a fixed-bed pyrolysis reactor, and natural gas is introduced from the inlet of the fixed-bed pyrolysis reactor at a gas flow rate of 10000ml / min, and the catalytic pyrolysis reaction is carried out at a constant temperature of 60min at 700°C and a pressure of 2Mp...

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Abstract

The invention discloses a method for preparing bio-oil by coupling biomass pyrolysis and methane aromatization, and belongs to the technical field of energy. The method comprises the following steps:(1) crushing biomass, and mixing the crushed biomass with a supported metal catalyst to obtain a mixture; (2) in a methane atmosphere, subjecting the mixture obtained in the step (1) to a catalytic pyrolysis reaction at a constant temperature of 600-800 DEG C and a pressure of 0.1-3.0 Mpa for 60-600 min; and (3) condensing and collecting the gas obtained by catalytic pyrolysis. According to the present invention, the hydropyrolysis cost is reduced, the participation of the oxidizing agent is not required, the yield and the quality of the bio-oil are higher than those of bio-oil subjected to hydropyrolysis under the same conditions, and the method has important industrial promotion value.

Description

technical field [0001] The invention relates to the field of energy technology, in particular to a method for preparing bio-oil by coupling biomass pyrolysis and methane aromatization. Background technique [0002] Today's society is facing problems such as energy shortage and increasingly serious environmental damage. As a renewable green energy, biomass energy, as a renewable green energy, is of great significance to industrial and social life. Biomass pyrolysis technology is to convert biomass into biomass energy. One of the effective and feasible methods. [0003] The liquid product obtained from biomass pyrolysis, that is, bio-oil, is an important chemical raw material. Bio-oil contains a large amount of aromatic hydrocarbons and heterocyclic compounds, and is the raw material for some special chemical preparations and new chemical materials. However, traditional biomass pyrolysis The quality of the bio-oil in the process is low and it is difficult to use it directly. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02C10L1/02
CPCC10B53/02C10L1/02Y02E50/10
Inventor 赵海玲刘越洋王瑞雪
Owner 赵海玲
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