Device and method for preparing hydrocarbon-rich bio-oil by continuous lignin catalytic pyrolysis

Abstract

The invention provides a device and a method for preparing hydrocarbon-rich bio-oil by continuous lignin catalytic pyrolysis. The device comprises a feeding system, a fluidized bed reactor, a cycloneseparation system, a fixed bed reactor, a bio-oil collection system, a gas detection system, a device control system and a carrier gas circulation system. The application method comprises the steps that: lignin enters the fluidized bed reactor through the feeding system to carry out deep cracking under the action of a bond breaking catalyst; the cyclone separation system separates and purifies a cracking product generated in the fluidized bed reactor, the cracking product enters the fixed bed reactor and is subjected to a further reforming reaction under the action of a reforming catalyst, theproduct is condensed to obtain hydrocarbon-rich bio-oil, and meanwhile, non-condensed gas is collected and passes through a fan, a gas mixing tank and a preheater to realize carrier gas self-circulation. According to the method, the hydrocarbon-rich bio-oil can be efficiently prepared by modulating the reaction working condition and the catalyst combination, the process is simple, and the methodhas good economic benefits and commercialization prospects.

Description

technical field [0001] The invention relates to the field of high-value lignin utilization, in particular to a device and method for producing hydrocarbon-rich bio-oil by continuous catalytic pyrolysis of lignin. Background technique [0002] Rapid pyrolysis liquefaction technology can convert low-grade lignin into bio-oil, solid charcoal and combustible gas, which is one of the main ways of high-value utilization of lignin resources. However, the traditional rapid pyrolysis technology of lignin has uncontrollable chemical bond breaking, and one-sided pursuit of bio-oil yield. At the same time, the composition of lignin pyrolysis oil is complex, which greatly increases the cost of subsequent separation and purification, and also limits lignin production. Commercial development of preparation chemicals. Therefore, increasing the content of some specific high value-added chemicals (aromatic compounds) in bio-oil to achieve directional regulation of lignin pyrolysis process ha...

AI Technical Summary

Problems solved by technology

[0004] During the directional conversion of lignin pyrolysis gas, the presence of oxygen-containing macromolecular compounds in the initial lignin pyrolysis gas increases the possibility of carbon deposition precursors, causing rapid deactivation of catalysts, resulting in low yields of target products and low selectivity

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