Method for preparing larch based ordered mesoporous carbon by virtue of soft template
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A soft template method and larch technology, applied in the direction of carbon preparation/purification, can solve the problems of complex reaction steps, increased use costs, increased reaction costs, etc., to achieve low raw material costs, increase utilization, and reduce production costs Effect
Inactive Publication Date: 2014-06-04
NORTHEAST FORESTRY UNIVERSITY +1
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The ordered mesoporous carbon prepared by this method has the characteristics of low cost, high carbon formation rate, and uniform pore size distribution. Preparation of ordered carbon materials, but the introduction of silicon sources increases the cost of use, the reaction steps are complicated, and the production cycle is long, which increases the cost of the reaction
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Embodiment 1
[0026] Take 10g of larch sawdust, 30g of phenol, 1mL of concentrated sulfuric acid (98%), and 2mL of phosphoric acid (85%) into a three-necked flask, install a stirrer and a condenser, and heat up, react at 110°C for 2 hours at reflux temperature, stop heating, and cool After reaching room temperature, add 80 mL of methanol, stir well, filter the mixture, and collect the filtrate after washing thoroughly. The filtrate was neutralized to neutral with sodium hydroxide, and insoluble matter such as salt was removed by filtration. The collected filtrate was distilled under reduced pressure at 40°C to remove methanol to obtain brown liquefied larch.
[0027] Add 90mL formaldehyde solution (37%), 3g NaOH, and 10g F127 to the flask successively, react at 40°C for 20h, then add 10mL concentrated hydrochloric acid, adjust the pH to 0.5, and continue the reaction for 8h. After the reaction is completed, cool to room temperature. Wash and dry in an oven at 100°C to obtain a larch-based m...
Embodiment 2
[0029]Take 10g of larch sawdust, 30g of phenol, 2mL of concentrated sulfuric acid (98%), and 2mL of phosphoric acid (85%) into a three-necked flask, install a stirrer and a condenser, and heat up, react at 120°C for 2 hours at reflux temperature, stop heating, and cool After reaching room temperature, add 100mL of methanol, stir well, filter the mixture, and collect the filtrate after fully washing. The filtrate was neutralized to neutral with sodium hydroxide, filtered to remove insoluble matter such as salt, and the collected filtrate was distilled under reduced pressure at 40°C to remove methanol to obtain brown liquefied larch.
[0030] Add 80mL formaldehyde solution (37%), 3g NaOH, and 10g F127 to the flask successively, react at 40°C for 18h, then add 10mL concentrated hydrochloric acid, adjust the pH to 0.5, and continue the reaction for 10h. Wash and dry in an oven at 100°C to obtain a larch-based mesoporous carbon mesophase. Preparation of molecular sieve carbon memb...
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Abstract
The invention provides a method for preparing a larch based ordered mesoporous carbon by virtue of a soft template. The method is characterized by comprising the steps of by taking the larch dust as the raw material and phenol as the liquifier, liquifying the larch to obtain a larch liquid under an acidic condition, reacting the larch liquid with formaldehyde under an alkali condition to generate phenolic resin, selecting a block copolymer F127 as the soft template and reacting under the acidic condition to generate the intermediate phase of the larch based ordered mesoporous carbon, and under the condition of nitrogen protection, calcining the intermediate phase of the larch based ordered mesoporous carbon to obtain the product. The method is mainly characterized in that as the biomass larch is taken as the raw material, the raw material is abundant, and the resource is reutilized, which is advantageous for saving energy and reducing consumption, the larch based dust is decomposed by the liquifying method so that the internal structure of the larch based dust is easier to regulate and control, and moreover, the mild soft template agent, namely the block copolymer F127, is selected to achieve successful regulation and control of the ordered mesoporous carbon, and furthermore, the method has the advantages of low pollution and high yield.
Description
Technical field: [0001] The invention relates to the field of biochar materials, in particular to a method for preparing larch-based ordered mesoporous carbon by soft template method. Background technique: [0002] As a new type of carbon material, porous carbon materials have attracted much attention. According to their special pore structure and different microscopic morphology, porous carbon materials can be widely used in the fields of adsorption separation, diffusion, catalyst carrier, energy storage and so on. At present, the preparation of mesoporous carbon mainly uses coal tar, pitch, petroleum, polymer, etc. as raw materials through physical and chemical activation method, polymer mixed carbonization method, organogel method and template method. Ordered mesoporous carbon has the advantages of periodic pores, large pore volume, large specific surface area, concentrated mesoporous distribution and adjustable pore size, and is an ideal separation material model for the...
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