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A kind of biomass catalytic pyrolysis method

A technology of catalytic pyrolysis and biomass, which is applied in the field of biomass energy conversion and utilization, can solve the problems of less research, achieve strong adsorption performance, high yield, and improve the efficiency of conversion and utilization

Active Publication Date: 2020-02-04
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this method is less studied in biomass microwave pyrolysis or microwave catalytic pyrolysis

Method used

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  • A kind of biomass catalytic pyrolysis method
  • A kind of biomass catalytic pyrolysis method
  • A kind of biomass catalytic pyrolysis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Prepare the loaded phosphotungstic acid HZSM-5 active agent by impregnation method, the loading of phosphotungstic acid (hereinafter referred to as PW) is 5%, that is, 5% PW / HZSM-5, and the loaded PW is Dawson structure; TiC and SiC The powder is mixed to make a composite wave absorbing agent with a mass ratio of 0.2:1; the active agent and wave absorbing agent are mixed at a ratio of 0.6:1 to make a microwave-induced catalyst; the prepared catalyst and biomass particles (from agricultural and forestry straw) After mixing evenly, put it into the microwave reactor. The average particle size of biomass particles is 0.3mm, the mass ratio of catalyst to biomass is 0.3:1, the microwave power is adjusted to 400W, the vacuum pressure is 10kPa, and the reaction time is 3min. The product bio-oil was obtained after fully condensing and cooling at 0°C under the suction of the pump; the solid residue mixture in the reactor was washed with distilled water for 6 minutes, centrifuged fo...

Embodiment 2

[0039] Prepare the loaded phosphotungstic acid HZSM-5 active agent by impregnation method, the loading of phosphotungstic acid (hereinafter referred to as PW) is 10%, that is, 10% PW / HZSM-5, and the loaded PW is Dawson structure; TiC and SiC The powder is mixed to make a composite wave absorbing agent with a mass ratio of 0.3:1; the active agent and wave absorbing agent are mixed at a ratio of 0.8:1 to make a microwave-induced catalyst; the prepared catalyst and biomass particles (from agricultural and forestry straw) After mixing evenly, put it into the microwave reactor. The average particle size of biomass particles is 1.5mm, the mass ratio of catalyst to biomass is 0.4:1, the microwave power is adjusted to 500W, the vacuum pressure is 20kPa, and the reaction time is 4min. The product bio-oil was obtained after full condensation and cooling temperature of -5°C under the suction of the reactor; the solid residue mixture in the reactor was washed with distilled water for 8 min...

Embodiment 3

[0046] Prepare the loaded phosphotungstic acid HZSM-5 active agent by impregnation method, the loading of phosphotungstic acid (hereinafter referred to as PW) is 15%, that is, 15% PW / HZSM-5, and the loaded PW is Dawson structure; TiC and SiC The powder is mixed to make a composite wave absorbing agent with a mass ratio of 0.4:1; the active agent and wave absorbing agent are mixed at a ratio of 1:1 to make a microwave-induced catalyst; the prepared catalyst and biomass particles (from agricultural and forestry straw) After mixing evenly, put it into the microwave reactor. The average particle size of biomass particles is 3mm, the mass ratio of catalyst to biomass is 0.5:1, the microwave power is adjusted to 600W, the vacuum pressure is 30kPa, and the reaction time is 5min. Under suction, after sufficient condensation, the cooling temperature is -10°C, and the product bio-oil is obtained; the solid residual mixture in the reactor is washed with distilled water for 10 minutes, cen...

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Abstract

The invention discloses a catalytic pyrolysis method for biomass. The method comprises the following steps of adopting loaded phosphotungstic acid HZSM-5 as an active agent, wherein the loading amountof the phosphotungstic acid is 5-15%; taking a mixture consisting of TiC powder and SiC powder as a composite wave absorbing agent, wherein the mass ratio of TiC to SiC is (0.2-0.4):1; taking a mixture consisting of the active agent and the composite wave absorbing agent as a microwave induction catalyst, wherein the mass ratio of the active agent to the composite wave absorbing agent is (0.6-1):1; uniformly mixing the microwave induction catalyst with the biomass according to the mass ratio of (0.3-0.5):1, and transferring the mixture into a microwave reactor for a catalytic pyrolysis reaction, wherein the microwave power is 400-600 W, the vacuum pressure is 10-30 kPa, and the reaction time is 3-5 minutes; condensing extracted pyrolysis gas to obtain a liquid-phase product, wherein an oil phase at the upper layer is biological oil; washing solid products remaining in the reactor with distilled water, and then separating and drying the solid products to obtain a biochar by-product. The method has the advantages that the biomass conversion efficiency is high, the selectivity of monocyclic aromatic hydrocarbon compounds is high, and the adsorption performance of the biochar by-product is excellent.

Description

technical field [0001] The invention relates to a biomass catalytic pyrolysis method, which belongs to the technical field of biomass energy conversion and utilization. Background technique [0002] As the only renewable energy that can be directly converted into carbon-containing liquid fuels, biomass energy is becoming more and more important for its development and utilization today when fossil fuels are depleted and the environment is deteriorating. Catalyst is added in the process of biomass pyrolysis to carry out catalytic pyrolysis of biomass, which is helpful to improve the fuel grade of bio-oil. At present, the catalytic active agents used in the catalytic pyrolysis of biomass mainly include alkali metals (Na 2 CO 3 , KCl and K 2 CO 3 etc.), alkaline earth metals (CaCl 2 , MgCl 2 and BaCl 2 etc.), metal oxides (MnO 2 、Al 2 o 3 and CuO, etc.) and molecular sieves (HZSM-5, HY and MCM-41, etc.), most of the active agents have good cracking and deoxidation per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00B01J20/20B01J20/30
Inventor 樊永胜金丽珠纪玮王佳伟熊永莲陈玉炜金仁瀚严军
Owner YANCHENG INST OF TECH
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