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Method for preparing porous biochar through waste-free biological refining and application

A biorefining and biochar technology, applied in biofuels, chemical instruments and methods, coke ovens, etc., can solve problems such as adverse impacts on the environment and economic benefits, and achieve the effects of practical principles, improved feasibility, and simple process operations

Active Publication Date: 2021-01-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after extraction, about 50-80% of the solid waste is incinerated or even discarded without further high-value utilization, which will have adverse effects on the environment and economic benefits

Method used

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  • Method for preparing porous biochar through waste-free biological refining and application
  • Method for preparing porous biochar through waste-free biological refining and application

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A method for preparing porous biochar by non-waste biorefining of succane pithline extraction residue, the specific steps are as follows:

[0026] (1) Preparation of succane pith extraction residue: Add 50g of cane pith and 1000mL of NaOH solution with a concentration of 50g / L into a 3L Erlenmeyer flask. The cane pith was purchased from Yunnan Paper Mill, the same below, for The sugarcane pith is extracted, and the electric heating constant temperature water bath is used at 25°C. The mixture is connected to a 20mm×50cm polytetrafluoroethylene-coated stirring rod, stirred at a speed of 600rpm by a mechanical mixer, and kept for 300min. The treated mixture Compress with a 0.5MPa flat extruder, wash the solid residue with a large amount of deionized water until neutral, and then dry it in an oven at 80°C for 24 hours to obtain the residue;

[0027] (2) Pre-carbonization of sugarcane pith residue: put the sugarcane pith residue obtained in step (1) into the crucible of the ...

Embodiment 2

[0033] A method for preparing porous biochar by non-waste biorefining of succane pithline extraction residue, the specific steps are as follows:

[0034] (1) Preparation of succane pith extract residue: add 50g of cane pith and 1500mL of 200g / L NaOH solution into a 3L Erlenmeyer flask, extract the cane pith, and use electric heating constant temperature water bath at 25 ℃, The mixture is connected with a 20mm×50cm polytetrafluoroethylene-coated stirring rod, stirred at a speed of 600rpm by a mechanical mixer, and kept for 300min. Wash the solid residue until neutral, and then dry it in an oven at 80°C for 24 hours to obtain the residue;

[0035] (2) Pre-carbonization of sugarcane pith residues: put the sugarcane pith residues obtained in step (1) into the crucible of a tube furnace, and use 1 o C / min heating rate to 300 oC Keep for 3h for pre-carbonization;

[0036] (3) Activation of sugarcane pith residue: Weigh 10g of sugarcane pith residue that has been pre-carbonized in...

Embodiment 3

[0040] A method for preparing porous biochar by non-waste biorefining of succane pithline extraction residue, the specific steps are as follows:

[0041] (1) Preparation of succane pith extract residue: add 50g of cane pith and 2000mL of 100g / L NaOH solution into a 3L Erlenmeyer flask to extract the cane pith, and use an electric heating constant temperature water bath at 25 ℃, the mixture is connected with a 20mm×50cm polytetrafluoroethylene-coated stirring rod, stirred at a speed of 600rpm by a mechanical mixer, and kept for 300min. The processed mixture is pressed with a 0.5MPa flat extruder, and a large amount of Wash the solid residue with ionized water until neutral, and then dry it in an oven at 80°C for 24 hours to obtain the residue;

[0042] (2) Pre-carbonization of sugarcane pith residue: put the sugarcane pith residue obtained in step (1) into the crucible of the tube furnace, o C / min heating rate to 500 oC Keep for 2h for pre-carbonization;

[0043] (3) Activat...

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Abstract

The invention discloses a method for preparing porous biochar through waste-free biological refining and an application. The method comprises the following steps: extracting bagasse pith through alkali liquor, filtering an extracting solution, and washing and drying filter residues; weighing the dried filter residues, and carrying out pre-carbonization in a nitrogen atmosphere; and mixing the pre-carbonized material with alkali, and performing activating in a nitrogen atmosphere to obtain the porous biochar. The biochar is used for purifying simulated chromium wastewater, the adsorption quantity of hexavalent chromium ions reaches up to 185.07 mg / g, the chromium-containing waste biochar is converted into a Cu-Cr / BPR-BC catalyst for further hydrogenation of furfural, and difurfuryl ether isselectively generated to reach 99.99%; According to the method, a waste-free biological refining mode is obtained, and industrial application of the bagasse pith or other similar wood fiber biomass alkali pre-extraction processes is achieved.

Description

technical field [0001] The invention relates to the resource utilization of agricultural and forestry waste and the environmental field of "using waste to make waste", in particular to a method for preparing porous biochar by waste-free bio-refining using pituline extraction residue and removing Cr(VI) and Application of further hydrogenating furfural to prepare bisfurfuryl ether. Background technique [0002] Considering the depletion of fossil resources and the corresponding environmental concerns, lignocellulosic biomass is increasingly recognized as a promising resource for the clean production of many alternative energy chemicals and materials. Cane pith is one of the main by-products of the sugar industry. It is rich in hemicellulose and can be converted into xylose, furfural, ethanol, and hemicellulose-based functional materials to realize its high-value applications. As an efficient extraction method of high molecular weight hemicellulose, alkali pre-extraction has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C10B53/02C02F101/22
CPCB01J20/20B01J20/3078C10B53/02C02F1/283B01J2220/485C02F2101/22Y02E50/10
Inventor 何亮陈冬关清卿
Owner KUNMING UNIV OF SCI & TECH
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