Catalyst for rapid pyrolysis and liquefaction of biomass as well as preparation method and application thereof

A catalyst and biomass technology, used in physical/chemical process catalysts, preparation of liquid hydrocarbon mixtures, metal/metal oxide/metal hydroxide catalysts, etc. The problems of weak carbon deposition ability and poor comprehensive catalytic effect can achieve the effect of easy modulation, low cost and special electronic performance.

Inactive Publication Date: 2014-04-02
BEIJING FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although a certain amount of catalytic pyrolysis research has been carried out in terms of catalyst selection and catalytic process regulation, however, due to the complexity of the catalytic pyrolysis liquefaction process of pyrolysis gas, the relevant research has not yet achieved ideal research results. The main problems are as follows: (1) In terms of catalyst selection, mainly focus on supported catalysts, but usually the carrier is not strong in anti-carbon deposition, and the catalytic life is short, resulting in poor overall catalytic effect; (2) In the catalytic process regulation In terms of research, at present, the research on the effect of catalytic pyrolysis mainly relies on analytical instruments, so that it cannot really reflect the situation of catalytic pyrolysis.
The carbon materials involved in many patented technologies are mostly commercially available activated carbon or conventionally prepared activated carbon as catalyst supports, and there are few reports on carbon-based catalysts for rapid pyrolysis and liquefaction of biomass.

Method used

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  • Catalyst for rapid pyrolysis and liquefaction of biomass as well as preparation method and application thereof

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preparation example Construction

[0022] The preparation method of the catalyst that the present invention proposes is used for biomass rapid pyrolysis liquefaction, comprises the following steps:

[0023] (1) Make the biomass particles react in nitrogen atmosphere at 450-600°C for 0.5-1.5 seconds to generate a mixture of fast pyrolytic charcoal and pyrolytic steam, and make the mixture of fast pyrolytic charcoal and pyrolytic steam undergo gas-solid separation , to obtain fast pyrolysis carbon and pyrolysis steam, and condense the pyrolysis steam at 0-10°C to obtain bio-oil and reducing non-condensable gas;

[0024] (2) Using the Soxhlet extraction method, extract the above-mentioned fast pyrolytic carbon with an organic solvent for 5 to 8 hours to remove the residual bio-oil in the fast pyrolytic carbon. The organic solvent is toluene, dichloromethane, anhydrous Any of diethyl ether or petroleum ether;

[0025] (3) Soak the fast pyrolytic carbon treated in step (2) in an alkaline solution with a molar conce...

Embodiment 1

[0034] (1) Catalyst carrier preparation process

[0035] The larch particles are reacted at 500°C for 1 second in a nitrogen atmosphere to generate a mixture of larch fast pyrolysis charcoal and larch pyrolysis vapor, and the mixture of larch fast pyrolysis charcoal and larch pyrolysis vapor is subjected to gas-solid separation , to obtain larch fast pyrolysis charcoal and larch pyrolysis vapor, and condense the larch pyrolysis vapor at 5° C. to obtain larch bio-oil and larch reducing non-condensable gas;

[0036] (2) Catalyst carrier pretreatment process

[0037] Using the Soxhlet extraction method, the larch fast pyrolytic charcoal was extracted with toluene for 5 hours to remove the larch bio-oil remaining in the larch fast pyrolytic charcoal; then soaked in a KOH solution with a molar concentration of 2mol / L for 0.5 hours , the weight ratio of fast pyrolytic carbon to KOH solution is 1:1, then washed with deionized water to pH = 7, and dried at 105°C for 3 hours; the trea...

Embodiment 2

[0041] (1) Catalyst carrier preparation process

[0042] The straw particles are reacted at 450°C for 0.5 seconds under a nitrogen atmosphere to generate a mixture of straw rapid pyrolysis charcoal and straw pyrolysis steam, and the mixture of straw rapid pyrolysis charcoal and straw pyrolysis vapor is subjected to gas-solid separation to obtain straw rapid pyrolysis Decomposing charcoal and straw pyrolysis steam, condensing the straw pyrolysis steam at 0-2°C to obtain straw bio-oil and straw reducing non-condensable gas;

[0043] (2) Catalyst carrier pretreatment process

[0044] Using the Soxhlet extraction method, the straw rapid pyrolysis carbon was extracted with anhydrous ether for 6 hours to remove the residual straw bio-oil in the straw rapid pyrolysis carbon; then soaked in NaOH solution with a molar concentration of 4mol / L for 2 hours, The weight ratio of fast pyrolytic carbon to NaOH solution is 1:0.5, then washed with deionized water to pH = 7, and dried at 120°C ...

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Abstract

The invention relates to a catalyst for rapid pyrolysis and liquefaction of biomass as well as a preparation method and application of the catalyst and belongs to the technical field of biomass energy. The catalyst consists of a carrier and an active component, wherein the active component is loaded onto the carrier through an immersion method. The carrier is a side product rapid pyrolysis carbon produced from the rapid pyrolysis and liquefaction of biomass; the rapid pyrolysis carbon is deoiled, delimed, activated and oxidized to form a middle-large hole structure with holes of 20-80 nanometers; the active component is a transition metal which is immersed onto the carrier through the steps of loading and reducing; then the catalyst for the rapid pyrolysis and liquefaction of biomass is prepared. By adopting the catalyst provided by the invention, the problem of high additional value utilization of the side product rapid pyrolysis carbon is solved, the adaptability to a pyrolysis reaction environment is strong, and the directional adjustment and control for the rapid pyrolysis and liquefaction of biomass can be realized.

Description

technical field [0001] The invention relates to a catalyst for rapid thermal cracking and liquefaction of biomass, a preparation method and application thereof, and belongs to the technical field of biomass energy. Background technique [0002] Pyrolysis liquefaction can efficiently convert biomass into liquid products—bio-oil (more than 70%), which can be used to prepare liquid fuels and chemical products to replace traditional fossil resources. It is internationally recognized that biomass energy conversion has the greatest development potential one of the technologies. However, although the crude bio-oil directly obtained by conventional pyrolysis liquefaction has the basic characteristics of being used as fuel and contains a variety of high value-added chemical components, its composition is very complex, containing acids, alcohols, phenols, aldehydes, ketones and other substances. There are hundreds of compounds such as saturated hydrocarbons, and the relative content ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/44B01J23/46B01J23/755C10G1/00C10B53/02
CPCY02E50/14Y02E50/10
Inventor 常建民王文亮任学勇李露霏司慧虞宇翔
Owner BEIJING FORESTRY UNIVERSITY
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