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Preparation method and application of stacking-coral-like biomass-charcoal-based catalyst

A biochar and catalyst technology, applied in the field of environmental engineering, can solve problems such as poor applicability, inability to use across industries, no consideration of metal dispersion, and limitation of desulfurization efficiency

Active Publication Date: 2021-09-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past researches, there were many kinds of sulfur-containing gases removed by using biomass waste to synthesize carbon-based materials, but the applicability was poor and it could not be used across industries; Considering the dispersion of metals, the shape and size of supports, and the types of metal precursors, the desulfurization efficiency is severely limited.

Method used

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  • Preparation method and application of stacking-coral-like biomass-charcoal-based catalyst
  • Preparation method and application of stacking-coral-like biomass-charcoal-based catalyst
  • Preparation method and application of stacking-coral-like biomass-charcoal-based catalyst

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Effect test

Embodiment 1

[0029] Embodiment 1: The preparation method of the coral stacked biomass carbon-based catalyst in this embodiment is as follows:

[0030] (1) Using walnut shells as biomass raw materials, carbonize at 700°C for 3 hours in a nitrogen atmosphere to obtain carbonized products;

[0031] (2) Grind the carbonized material to 40-60 mesh, wash it with water three times, and then dry it in an electric furnace at 105°C for 12 hours to obtain a biomass-based carbonized carrier;

[0032] (3) Add the biomass-based carbonized carrier to the reaction kettle containing copper nitrate solution (the mass of copper nitrate in the copper nitrate solution is 90% of the mass of the biomass-based carbonized carrier), and then add the total volume of the reaction system solution (nitric acid Copper solution + nitric acid) 2.5% nitric acid, after mixing, at 180 ° C, the hydrothermal time is 9 hours, and the biomass-based catalyst precursor is obtained;

[0033] (4) Put the biomass-based catalyst prec...

Embodiment 2

[0036] Embodiment 2: The preparation method of the coral stacked biomass carbon-based catalyst in this embodiment is as follows:

[0037] (1) Using straw as a biomass raw material, carbonize at 800°C for 2 hours in a nitrogen atmosphere to obtain carbonized products;

[0038] (2) Grind the carbonized material to 40-60 mesh, wash it with water three times, and then dry it in an electric furnace at 100°C for 12 hours to obtain a biomass-based carbonized carrier;

[0039] (3) Add the biomass-based carbonized carrier to the reaction kettle containing copper nitrate solution (the mass of copper nitrate in the copper nitrate solution is 150% of the mass of the biomass-based carbonized carrier), and then add the total volume of the reaction system solution (nitric acid Copper solution + nitric acid) 3% nitric acid, after mixing at 160°C, hydrothermal time is 10h, to prepare the biomass-based catalyst precursor;

[0040] (4) Put the biomass-based catalyst precursor in a tube furnace,...

Embodiment 3

[0042] Embodiment 3: The preparation method of the coral stacked biomass carbon-based catalyst in this embodiment is as follows:

[0043] (1) Tobacco stems were used as biomass raw materials, and charred products were obtained by carbonization at 600°C for 3 hours in a nitrogen atmosphere;

[0044] (2) Grind the carbonized material to 40-60 mesh, wash it with water three times, and then dry it in an electric furnace at 110°C for 12 hours to obtain a biomass-based carbonized carrier;

[0045] (3) Add the biomass-based carbonized carrier to the reaction kettle containing the copper nitrate solution (the mass of copper nitrate in the copper nitrate solution is 100% of the mass of the biomass-based carbonized carrier), and then add the total volume of the reaction system solution (nitric acid Copper solution + nitric acid) 2% nitric acid, mixed at 140 ° C, hydrothermal time of 12 hours, prepared biomass-based catalyst precursor;

[0046] (4) Put the biomass-based catalyst precurs...

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Abstract

The invention discloses a preparation method of a stacking-coral-like biomass-charcoal-based catalyst. The preparation method comprises the following steps: cleaning and crushing a biomass raw material, and conducting carbonizing under the protection of inert gas; performing grinding, then carrying out washing with water to remove impurities on the surface of a carbonized material, and then conducting drying to obtain a biomass-charcoal-based carrier; mixing the biomass-charcoal-based carrier, a nitrate solution and nitric acid in a reaction kettle, and then performing a hydrothermal reaction to prepare a biomass-charcoal-based catalyst precursor; and roasting the biomass-charcoal-based catalyst precursor in an inert atmosphere to obtain the stacking-coral-like biomass-charcoal-based catalyst. Compared with a traditional impregnation method, the catalyst prepared by the method disclosed by the invention has the advantages that an active component has a unique morphological structure, so the active component is exposed more sufficiently, and the catalyst can adapt to different flue gas atmospheres to remove different sulfur-containing gases; the activity of the catalyst is higher, penetration time is longer, and the sulfur capacity of the catalyst is larger; and raw materials are wide in source, cost is low, and the method is suitable for industrial production and market popularization and application.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a method for preparing a coral-stacked biomass carbon-based catalyst and a method for the catalyst to be used for deep removal of sulfur-containing gas under different flue gas atmospheres. Background technique [0002] In recent years, biochar has attracted widespread attention due to its wide application in agriculture, environment, energy and other fields. Biochar not only has the characteristics of activated carbon, but also has better microporous structure and larger specific surface area, and shows better activity in some adsorption and catalytic reactions, and has a wide range of raw materials, low production costs, ecological Notable features such as safety, pollution-free, and large-scale promotion. Common biochars include charcoal, straw charcoal, bamboo charcoal, peanut shell charcoal, rice husk charcoal, walnut shell charcoal, coconut shell charco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J23/745B01J35/02B01D53/86B01D53/52B01D53/48B01J35/00
CPCB01J23/72B01J23/745B01D53/8612B01D53/8606B01D53/8603B01J35/00B01J35/30Y02E50/10
Inventor 包加成李凯王飞冯嘉予孙鑫宁平王驰宋辛杨洁
Owner KUNMING UNIV OF SCI & TECH
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