Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for preparing light aromatic compounds by coupling catalytic reforming of biomass solvent liquefaction

A technology for catalytic reforming and biomass, which is applied in the preparation of liquid hydrocarbon mixtures and the petroleum industry. The effect of carbon generation

Inactive Publication Date: 2016-08-17
NANJING NORMAL UNIVERSITY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to realize the high-efficiency conversion of biomass to produce light aromatic compounds, after conventional biomass liquefaction to prepare liquid fuel, the product is condensed and then enters the catalytic reforming reactor for reforming reaction. This type of conversion method mainly has two disadvantages: 1. Biomass Substance liquefaction and reforming reactions generally adopt the process of first liquefying to generate liquefied oil and then reforming the liquefied oil. The high-temperature pyrolysis steam of biomass is first condensed by a rapid condensation device to obtain liquid oil at room temperature, and then the liquefied oil is heated to a specified temperature for liquefied oil The steam reforming reaction wastes a lot of energy in the intermediate step of first condensing and then heating; 2. The catalyst used in the catalytic reforming reaction is prone to coking and carbon deposition, resulting in catalyst deactivation and reduced catalytic efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] Preparation of microporous-mesoporous composite molecular sieve catalyst: firstly, the molecular sieve is treated with alkali to form molecular sieve sub-units or fragments, and then as an inorganic source, under the induction of mesoporous soft template or hard template, sucrose, glucose and phenolic Resin, etc. are used as carbon sources, and a suitable method for pyrolytic carbonization of precursors (carbon sources) and deposition in the pores of mesoporous materials is studied. High-temperature nitrided nitrogen atoms replace oxygen atoms on the molecular sieve framework, and finally assemble to form a micropore-mesoporous composite Molecular sieve.

[0023] The hydrogen-donating solvent includes methanol, ethanol, phenol, acetone, tetralin, and a mixture of any combination of one or more solvents.

[0024] Biomass is a lignocellulosic biomass raw material, including a mixture of any combination of one or more of crops, crop waste, wood, wood waste or forestry wast...

Embodiment 1

[0030] Take 5g of pine sawdust raw material with a particle size ranging from 0.3 to 0.6mm, mix it with methanol solution, and the mass volume ratio of sawdust / methanol is 1 / 5 (g / mL), then move the mixture to a high-pressure reactor, and heat it at 200°C, The solvent liquefaction degradation reaction is carried out under a nitrogen atmosphere, and the gaseous reaction product is directly moved to the subsequent catalytic reforming reactor without condensation. Under the action of a microporous-mesoporous composite molecular sieve catalyst, the catalytic reforming reaction is carried out at 400 ° C. After the reaction is complete, The yield of the liquid product obtained through condensation was 46.1%, and the content of light aromatics (benzene, toluene, xylene, naphthalene) was analyzed by GCMS, and the content of light aromatics was calculated to be 6.4%.

Embodiment 2

[0032] Take 5g of pine sawdust raw material with a particle size ranging from 0.3 to 0.6mm, mix it with methanol solution, and the mass volume ratio of sawdust / methanol is 1 / 5 (g / mL), then move the mixture to a high-pressure reactor, and heat it at 250°C, The solvent liquefaction degradation reaction is carried out under a nitrogen atmosphere, and the gaseous reaction product is directly transferred to the subsequent catalytic reforming reactor without condensation. Under the action of a microporous-mesoporous composite molecular sieve catalyst, the catalytic reforming reaction is carried out at 420°C. After the reaction is complete, The yield of the liquid product obtained through condensation was 49.3%, and the content of light aromatics (benzene, toluene, xylene, naphthalene) was analyzed by GCMS, and the content of light aromatics was calculated to be 6.7%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for preparing light aromatic hydrocarbon compounds through solvent liquefaction coupled catalytic reforming of biomass, and belongs to the field of biomass energy utilization. The method comprises the following steps: mixing biomass with a hydrogen supply solvent, completing a solvent liquefaction reaction in a high pressure reaction apparatus, directly introducing the obtained gaseous product into a catalytic reforming reaction apparatus without condensation, carrying out a catalytic reforming reaction under the action of a microporous-mesoporous composite molecular sieve catalyst, collecting the obtained gas, and condensing the gas to obtain a liquid product rich in the light aromatic hydrocarbon compounds. The method is simple, is easy to operate, effectively couples existing technologies, uses an improved catalyst, allows the aromatic hydrocarbon compounds containing a carbon chain with the carbon number of 5 or more to be directionally generated, and guarantees high a raw material conversion rate; a condensation step of the biomass solvent liquefaction gas product, so energy is saved; and contacts and the catalytic reforming reaction of the gas product and the catalyst are carried out in a fast time, so the energy efficiency is improved.

Description

technical field [0001] The invention relates to the field of biomass energy utilization, in particular to a method for preparing light aromatic compounds by coupling catalytic reforming of biomass solvent liquefaction. Background technique [0002] Light aromatics are one of the raw materials of organic chemical industry. They are widely used in plastics, pesticides, medicine, fuel and other industries. Their output and production technology level are important symbols to measure the development level of a country's organic chemical industry. At present, light aromatics mainly come from the petrochemical industry, but fossil fuels such as coal and petroleum not only have limited reserves, but also produce a large amount of sulfur oxides and nitrogen oxides during use, seriously polluting the environment, and seek new renewable energy The preparation of light aromatic compounds instead of fossil energy is becoming the focus of public attention. [0003] As a renewable resour...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00
Inventor 姜小祥卢平杨宏旻张居兵解晓健任佳新
Owner NANJING NORMAL UNIVERSITY