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Method for preparing hydrogen-rich fuel gas by catalyzing biomass tar cracking through aluminum smelting waste residues

A technology of tar cracking and aluminum waste residue, which is applied in the direction of catalyst activation/preparation, biofuels, chemical instruments and methods, etc., can solve the problems of expensive catalysts and poor hydrogen selectivity, so as to promote high-value utilization and industrialization process , the effect of increasing the hydrogen production rate

Active Publication Date: 2022-03-08
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the catalysts used in catalytic cracking are relatively expensive and have poor hydrogen selectivity.

Method used

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  • Method for preparing hydrogen-rich fuel gas by catalyzing biomass tar cracking through aluminum smelting waste residues
  • Method for preparing hydrogen-rich fuel gas by catalyzing biomass tar cracking through aluminum smelting waste residues
  • Method for preparing hydrogen-rich fuel gas by catalyzing biomass tar cracking through aluminum smelting waste residues

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Experimental program
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Effect test

Embodiment 1

[0031] This embodiment provides a method for preparing hydrogen-rich gas by using aluminum smelting waste slag to catalyze biomass tar cracking, including:

[0032] (1) Adding 0.5mol / L sulfuric acid to soak aluminum smelting waste slag for 2 hours, filter, and bake the obtained precipitate at 350°C for 4 hours to obtain pretreated aluminum smelting waste slag;

[0033] (2) Add the pretreated aluminum smelting waste slag to 1mol / L acetic acid, ultrasonically treat (ultrasonic frequency 20kHz, ultrasonic power 600W, processing time 30min), centrifuge the solution (2000r / min), and bake at a constant temperature of 450°C in an air atmosphere 4h, naturally cooled to room temperature to obtain a cracking catalyst;

[0034] (3) After mixing the cracking catalyst and biomass (crushed poplar to 200 mesh) in a mass ratio of 1:1, add to 90ml / min N 2 The primary pyrolysis furnace under the atmosphere is heated from room temperature to 900°C at a heating rate of 20°C / min to obtain the pri...

Embodiment 2

[0038] This embodiment provides a method for preparing hydrogen-rich gas by using aluminum smelting waste slag to catalyze biomass tar cracking, including:

[0039] (1) Add 1 mol / L nitric acid to soak aluminum smelting waste residue for 2 hours, filter, and bake the obtained precipitate at 350° C. for 4 hours to obtain pretreated aluminum smelting waste residue;

[0040] (2) Add the pretreated aluminum smelting waste slag to 1mol / L acetic acid, ultrasonically treat (ultrasonic frequency 20kHz, ultrasonic power 600W, processing time 30min), centrifuge the solution (2000r / min), and bake at a constant temperature of 450°C in an air atmosphere 4h, naturally cooled to room temperature to obtain a cracking catalyst;

[0041] (3) After mixing the cracking catalyst and biomass (crushed poplar to 200 mesh) in a mass ratio of 1:1, add to 90ml / min N 2 The primary pyrolysis furnace under the atmosphere is heated from room temperature to 900°C at a heating rate of 20°C / min to obtain the p...

Embodiment 3

[0044] This embodiment provides a method for preparing hydrogen-rich gas by using aluminum smelting waste slag to catalyze biomass tar cracking, including:

[0045] (1) Add 0.5mol / L phosphoric acid to soak aluminum smelting waste residue for 2 hours, filter, and bake the resulting precipitate at 350°C for 4 hours to obtain pretreated aluminum smelting waste residue;

[0046] (2) Add the pretreated aluminum smelting waste slag to 1mol / L acetic acid, ultrasonically treat (ultrasonic frequency 20kHz, ultrasonic power 600W, processing time 30min), centrifuge the solution (2000r / min), and bake at a constant temperature of 450°C in an air atmosphere 4h, naturally cooled to room temperature to obtain a cracking catalyst;

[0047] (3) After mixing the cracking catalyst and biomass (crushed poplar to 200 mesh) in a mass ratio of 1:1, add to 90ml / min N 2 The primary pyrolysis furnace under the atmosphere is heated from room temperature to 900°C at a heating rate of 20°C / min to obtain the...

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Abstract

The invention discloses a method for preparing hydrogen-rich gas by catalyzing biomass tar cracking through aluminum smelting waste residues, which comprises the following steps: adding the aluminum smelting waste residues into medium strong acid, soaking for 2-4 hours, filtering, and baking the obtained precipitate at 300-400 DEG C for 3-6 hours to obtain pretreated aluminum smelting waste residues; adding the pretreated aluminum smelting waste residues into weak acid, performing ultrasonic treatment, performing centrifugal separation on an aluminum ash solution, baking for 3-6 hours at the constant temperature of 400-500 DEG C in an air atmosphere, and naturally cooling to room temperature to obtain a cracking catalyst; the method comprises the following steps: uniformly mixing a cracking catalyst and biomass according to a mass ratio of 1: 1, adding the mixture into a first-stage pyrolyzing furnace in an N2 atmosphere, and heating from room temperature to 500-900 DEG C to obtain first-stage pyrolyzing gas; and the first-stage pyrolysis gas enters a second-stage pyrolysis furnace for secondary catalytic cracking, and hydrogen-rich gas is obtained. According to the method, the hydrogen yield can be effectively increased by 200% or above, the tar yield is effectively reduced, the liquid yield is controlled to be 11% or below, and heavy components in the tar are greatly reduced.

Description

technical field [0001] The invention belongs to the field of biomass energy utilization, and in particular relates to a method for preparing hydrogen-rich gas by using aluminum smelting waste slag to catalyze biomass tar cracking. Background technique [0002] With the development and application of green and efficient fuel cell technology, there is a huge market demand for hydrogen as a fuel. Hydrogen production mainly comes from the cracking and reforming of fossil fuels, accounting for as much as 96%. However, due to the large number of environmental and climate problems caused by the use of fossil energy, researchers began to look for new energy to produce hydrogen. [0003] Biomass has a wide range of sources, and its hydrogen content is slightly higher than that of coal and other fossil fuels. It can be used as a source of hydrogen for development and research. During the hydrogen production process of biomass pyrolysis, a large amount of tar is produced, which may ea...

Claims

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Application Information

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IPC IPC(8): C10B53/02C10B57/02C10B57/12B01J21/04B01J37/00B01J37/34B01J37/08
CPCC10B53/02C10B57/02C10B57/12B01J21/04B01J37/009B01J37/343B01J37/08Y02E50/10
Inventor 雷廷宙刘鹏李学琴陈文轩李艳玲郎盼盼杨延涛任素霞董莉莉呼和涛力
Owner CHANGZHOU UNIV
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