Method for preparing biomass base liquid fuel by using ordered mesoporous TiO2-base catalyst

A liquid fuel, biomass technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as poor catalytic activity, achieve a single pore size distribution, Good catalytic cracking performance, the effect of preventing carbon deposition reaction

Active Publication Date: 2014-07-16
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Several ordered mesoporous catalysts have been reported for online catalytic cracking, such as MCM-41, SBA-15, etc. However, at the atomic level, these ordered mesoporous catalysts are composed of amorphous SiO 2 composed of, with and SiO 2 Same chemical properties, poorer catalytic activity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Ordered Mesoporous TiO 2 The preparation of catalyst: take by weighing 10g of P123 (EO 20 PO 70 EO 20 ), it was dissolved in 200g of absolute ethanol, and then successively weighed 6g of titanium tetrachloride (TiCl 4 ) and 25g titanium isopropoxide (Ti(OC 3 h 7 ) 4 ) slowly drop into the above mixed solution, so that TiCl 4 and Ti(OC 3 h 7 ) 4 The molar ratio of P123 and TiCl is 1:2.8 4 The mass ratio is 5:3; the mixture was stirred at room temperature for 2h, then the mixture was transferred to a Petri dish and allowed to stand at 40°C for 1 day in an air atmosphere, and finally the solid xerogel was baked at 350°C in air 2h, 5.7g ordered mesoporous TiO was obtained 2 .

[0021] The above ordered mesoporous TiO 2 Grind to a particle size of about 0.5 mm, and put them all into a fixed-bed catalytic reactor for online catalytic cracking experiments.

[0022] Using dry poplar with a particle size of about 2mm as raw material, rapid pyrolysis is carried out ...

Embodiment 2

[0025] Measure the palladium nitrate dihydrate of 0.192g to be dissolved in deionized water, and the ordered mesoporous TiO prepared in 5.0g embodiment 1 2 Add the powder into the above salt solution, slowly drop ammonia water under stirring until the pH value reaches 9, continue to stir at room temperature for 12 hours, filter and dry at 100°C for 3 hours, and finally reduce the dried product at 280°C under hydrogen and nitrogen atmosphere 3h, 5.08g of Pd-loaded ordered mesoporous TiO was obtained 2 (Pd / TiO 2 ), wherein the mass percentage of Pd is 1.5%.

[0026] The above ordered mesoporous Pd / TiO 2 Grind to a particle size of about 0.5 mm, and put them all into a fixed-bed catalytic reactor for online catalytic cracking experiments.

[0027] Using dry poplar with a particle size of about 2mm as raw material, rapid pyrolysis is carried out at 500°C in a nitrogen atmosphere. After gas-solid separation, the high-temperature pyrolysis gas is directly passed into the ordered ...

Embodiment 3

[0030] Ordered Mesoporous TiO 2 The preparation of catalyst: take by weighing 8g of P123 (EO 20 PO 70 EO 20 ), it was dissolved in 160g of absolute ethanol, and then successively weighed 6g of titanium tetrachloride (TiCl 4 ) and 25g titanium isopropoxide (Ti(OC 3 h 7 ) 4 ) slowly drop into the above mixed solution, so that TiCl 4 and Ti(OC 3 h 7 ) 4 The molar ratio of P123 and TiCl is 1:2.8 4 The mass ratio is 4:3; the mixture was stirred at room temperature for 2h, then the mixture was transferred to a Petri dish and allowed to stand at 40°C for 1 day in an air atmosphere, and finally the solid xerogel was baked at 350°C in air 2h, 5.7g ordered mesoporous TiO was obtained 2 .

[0031]The above ordered mesoporous TiO 2 Grind to a particle size of about 0.5 mm, and put them all into a fluidized bed catalytic reactor for online catalytic cracking experiments.

[0032] Using natural air-dried poplar wood (moisture content 8%) with a particle size of about 2mm as ra...

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Abstract

The invention, belonging to the technical field of utilizing biomass energy, particularly relates to a method for preparing a biomass base liquid fuel by using an ordered mesoporous TiO2-base catalyst, comprising the following steps: using pure ordered mesoporous TiO2 or Pd-supported ordered mesoporous TiO2 as the catalyst, carrying out rapid pyrolysis on the biomass under anaerobic conditions at 400-600 DEG C, then letting the high temperature pyrolysis gases in a reactor containing the catalyst, letting the pyrolysis products under the effect of the catalyst be subject to cracking, dehydration, rearrangement and other reactions, and then rapidly condensing the pyrolysis gases to room temperature and collecting the liquid products to obtain the liquid fuel with good quality. According to the invention, by using the ordered mesoporous TiO2-base catalyst, the macromolecular oligomer in the pyrolysis products can be effectively promoted to generate cracking reaction, the inactivation of the catalyst caused by the blockage of the pore channels is prevented, and aldehyde, acid and other ingredients which have negative effects on the properties of the liquid fuel product in the pyrolysis products can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of utilization of biomass energy, in particular to a method for utilizing ordered mesoporous TiO 2 A method for preparing a biomass-based liquid fuel based on a catalyst. Background technique [0002] With the depletion of fossil fuels, the development and utilization of biomass energy has aroused widespread concern around the world. Rapid pyrolysis of biomass to produce bio-oil is an efficient way to utilize biomass energy. As a new type of liquid fuel, bio-oil is expected to replace petroleum fuel. However, the low fuel grade of conventional bio-oil limits its application in various thermal equipment. On-line catalytic cracking is an effective bio-oil refining and upgrading method. Under the action of a catalyst, the pyrolysis products of large molecules are further cracked into smaller molecules, and deoxidation, aldehydes and acids are achieved in the process Transformation of substances and many othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00B01J21/06B01J23/42
Inventor 陆强董长青杨勇平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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