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

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 ...

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.

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