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Method for preparing C6-C18 power fuel from biomass

A biomass and power technology, which is applied in the field of catalytic conversion of biomass to produce liquid fuels and chemical products, can solve problems such as difficulty in direct utilization, high requirements for raw materials, and low yield, and achieve cost-saving effects.

Inactive Publication Date: 2020-08-28
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the quality of liquid fuel directly prepared from biomass is poor. Even if a catalyst is used, the carbon number of the product is difficult to control, and the oil will be acidic, making it difficult to use directly.
[0007] From the above, it can be seen that the current catalytic pyrolysis of biomass is mainly to directly prepare bio-oil in one step. The composition analysis of the prepared bio-oil shows that the yield of alkanes and aromatics is below 45%, and it contains a large amount of acetic acid and macromolecules. Compounds, etc., even if the optimized product is refined by various subsequent methods, the entire process from raw materials to the target product is independent, discontinuous, low yield, high requirements for raw materials, and high cost is difficult for industrial production

Method used

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  • Method for preparing C6-C18 power fuel from biomass
  • Method for preparing C6-C18 power fuel from biomass
  • Method for preparing C6-C18 power fuel from biomass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In the two-stage pyrolysis reactor, the straw is rapidly pyrolyzed at 380 °C, and the pyrolysis gas is transformed into oxygen-containing small molecular compounds under the action of ceria catalyst at 420 °C. The pyrolysis reaction time is 30min to ensure that all raw materials are fully pyrolyzed.

[0048] In a fixed-bed continuous reactor, under the action of 20% copper-loaded red mud catalyst (prepared by equal-volume impregnation method), the oxygen-containing small molecule compounds generated by biomass pyrolysis, the internal pressure of the reactor is 6.2MPa, and the reaction The temperature is 350°C, the hydrogen flow rate is 100mL / min, and a one-step C-C coupling hydrogenation reaction is carried out to obtain C 6 ~C 18 power fuel, the reaction time is 20min.

[0049] Among them, the oxygen-containing small molecular compound is detected by gas chromatography-mass spectrometry. According to the gas chromatography-mass spectrometry inspection results, the ca...

Embodiment 2

[0057] In the two-stage pyrolysis reactor, the straw is rapidly pyrolyzed at 380 °C, and the pyrolysis gas is oriented to oxygen-containing small molecular compounds under the action of ceria catalyst (prepared by equal volume impregnation method) at 420 °C. conversion, the pyrolysis reaction time is 30 minutes to ensure that all raw materials are fully pyrolyzed.

[0058] In a fixed-bed continuous reactor, the content of oxygen-containing small molecular compounds generated by biomass pyrolysis is about 20%. , the hydrogen flow rate is 150mL / min, and a one-step C-C coupling hydrogenation reaction is carried out to obtain C 6 ~C 18 power fuel, the reaction time is 40min.

[0059] In the reflux condenser, C 6 ~C 18 The staged condensation of the motive fuel realizes product separation, and the temperatures of the split condensers are set at 15°C, -5°C and -15°C, respectively.

[0060] Wherein, the oxygen-containing small molecular compound is detected by gas chromatography...

Embodiment 3

[0067] In the two-stage pyrolysis reactor, cypress is rapidly pyrolyzed at 380°C, and the pyrolysis gas is transformed into oxygen-containing small molecular compounds under the action of ceria catalyst at 420°C. The pyrolysis reaction time is 30min to ensure that all raw materials are fully pyrolyzed.

[0068] In a fixed-bed continuous reactor, under the action of 20% copper-loaded red mud catalyst (prepared by co-precipitation method), the oxygen-containing small molecule compounds generated by biomass pyrolysis, the pressure inside the reactor is 6.2MPa, and the reaction temperature at 350°C, with a hydrogen flow rate of 200mL / min, perform a one-step C-C coupling hydrogenation reaction to obtain C 6 ~C 18 power fuel, the reaction time is 60min. The carbon yield of the oxygen-containing small molecular compound is 78.93, and the carbon yield of the power fuel is 62.4.

[0069] In the reflux condenser, C 6 ~C 18 The fractional condensation of the power fuel realizes prod...

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Abstract

The invention relates to a method for preparing C6-C18 power fuel from biomass. The method mainly comprises the following steps: 1) in a two-stage pyrolysis reactor, carrying out catalytic pyrolysis on biomass under the action of a metal oxide catalyst to prepare an oxygen-containing small molecular compound; 2) in a fixed bed continuous reactor, carrying out one-step C-C coupling hydrogenation onthe oxygen-containing small molecule compound to form alkane and aromatic hydrocarbon in a C6-C18 range; and 3) in a reflux condenser, alkane and aromatic hydrocarbon in the range of C6-C18 are subjected to fractional condensation according to the carbon number distribution of gasoline, kerosene and diesel oil. According to the method, all the steps are continuously carried out, catalyst separation and product rectification are not needed, the cost is greatly saved, and the reaction time is effectively shortened. The renewable biomass is used as a raw material, meanwhile, gasoline, kerosene,diesel oil and other power fuels are prepared and separated, and a traditional petroleum source refining technology can be partially replaced.

Description

technical field [0001] The invention belongs to the field of producing liquid fuel and chemical products through catalytic conversion of biomass, in particular to a method for preparing C 6 ~C 18 method of power fuel. Background technique [0002] Today's world is facing the depletion of fossil fuels and various problems of environmental protection. Human beings urgently need to find a sustainable alternative energy source. The fuel sources currently used are mainly coal, oil and natural gas, but these are non-renewable resources. Power fuels prepared from fossil fuels will emit a large amount of carbon dioxide into the atmosphere during use, which will cause a greenhouse effect and is extremely unfavorable to the environment. Protect. Biomass resources, as an inexhaustible and inexhaustible energy source, have gradually entered the field of vision of human beings. They can be converted into various forms of energy and high-value chemicals, and are renewable and low-emiss...

Claims

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Application Information

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IPC IPC(8): C10G1/00C10B53/02
CPCC10G1/00C10G1/002C10B53/02C10G2300/1014Y02E50/30Y02E50/10
Inventor 邵珊珊项贤亮刘成跃李小华
Owner JIANGSU UNIV