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Ginger straw-based solid acid catalyst as well as preparation method and application thereof

A solid acid catalyst and ginger technology, applied in the direction of catalyst activation/preparation, carboxylic acid ester preparation, chemical instruments and methods, etc., to achieve the effects of easy recovery, low cost and strong practicability

Pending Publication Date: 2021-08-03
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no research on the synthesis of carbon-based solid acid catalyst based on ginger straw and its application in the field of biodiesel production in the prior art

Method used

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  • Ginger straw-based solid acid catalyst as well as preparation method and application thereof
  • Ginger straw-based solid acid catalyst as well as preparation method and application thereof
  • Ginger straw-based solid acid catalyst as well as preparation method and application thereof

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preparation example Construction

[0023] A ginger straw-based solid acid catalyst for catalyzing esterification to produce biodiesel and a preparation method thereof, comprising the following steps:

[0024] 1) Wash the harvested ginger stalks to remove surface impurities and dry them at 105°C.

[0025] 2) Grinding and sieving the dried ginger stalks to 120 mesh (0.125 mm) to obtain ginger stalk powder.

[0026] 3) Take 10 g of ginger straw powder sieved in step 2) and carry out pyrolysis and carbonization in an inert atmosphere. The carbonization temperature is 300-500° C., and the carbonization time is 30-240 minutes.

[0027] 4) Take 4 g of the carbonized sample in step 3) and add 60 mL of concentrated sulfuric acid (95%-98%) for sulfonation reaction, and magnetically stir; the sulfonated product is fully filtered and washed with dewarmed deionized water until the filtrate is neutral , the filter cake was placed in a blast drying oven at 105° C. and dried to a constant weight to obtain a ginger straw-base...

Embodiment 1

[0039]Ginger stalks collected from the field were washed to remove surface impurities, and dried in an oven at 105°C for later use. Grind and sieve the dried ginger stalks to 120 mesh (0.125 mm) to obtain powder; take 10 g of the sieved ginger stalk powder and place it in a program-controlled tube furnace, and heat up at a heating rate of 5 °C / min under an inert atmosphere. Maintain carbonization at 350°C for 120min; mix 4g of carbonized product with 60mL of concentrated sulfuric acid, and sulfonate at 105°C for 120min in a collector type constant temperature heating magnetic stirrer; after the reaction, cool the sulfonated product to room temperature and filter , washed repeatedly with warm deionized water until the filtrate was neutral; the obtained filter cake was dried in an oven at 105°C overnight to constant weight to obtain a ginger straw-based solid acid catalyst, and its acid density was measured based on the acid-base titration method It is 1.01 mmol / g.

[0040] In ...

Embodiment 2

[0042] Ginger stalks collected from the field were washed to remove surface impurities, and dried in an oven at 105°C for later use. Grind and sieve the dried ginger stalks to 120 mesh (0.125 mm) to obtain powder; take 10 g of the sieved ginger stalk powder and place it in a program-controlled tube furnace, and heat up at a heating rate of 5 °C / min under an inert atmosphere. Maintain carbonization at 400°C for 120min; mix 4g of carbonized product with 60mL of concentrated sulfuric acid, and sulfonate at 105°C for 120min in a collector type constant temperature heating magnetic stirrer; after the reaction, cool the sulfonated product to room temperature and filter , washed repeatedly with warm deionized water until the filtrate was neutral; the obtained filter cake was dried in an oven at 105°C overnight to constant weight to obtain a ginger straw-based solid acid catalyst, and its acid density was measured based on the acid-base titration method It is 0.97mmol / g.

[0043] In ...

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Abstract

The invention relates to a ginger straw-based solid acid catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps of: (1) washing and drying ginger straws, crushing the ginger straws, and screening to obtain powder with the particle size of less than 0.125 mm; (2) incompletely carbonizing the screened ginger straw powder in an inert atmosphere to obtain pyrolytic carbon; (3) mixing the pyrolytic carbon with a certain amount of concentrated sulfuric acid, heating, carrying out sulfonation reaction, and stirring; and (4) filtering, washing and drying the sulfonated product to obtain the ginger straw-based solid acid catalyst. According to the method, high-value utilization of the ginger straw waste can be achieved, and meanwhile the prepared ginger straw solid acid is good in catalytic esterification performance, mild in preparation condition and low in production cost and has a good industrial application prospect.

Description

technical field [0001] The invention relates to catalyst preparation technology and resource utilization of ginger stalks, in particular to a ginger stalk-based solid acid catalyst for biodiesel and a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Biodiesel is renewable, has significant carbon emission reduction in its life cycle, and has similar physical and chemical indicators to fossil diesel, which is of great significance for alleviating environmental pollution and greenhouse effect caused by the use of fossil energy. NaOH, KOH, NaOCH 3 Isobase-catalyzed transesterification has the advantages of fast reaction rate and hig...

Claims

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Application Information

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IPC IPC(8): B01J37/08B01J27/02C07C67/08C07C69/58C10L1/02C11C3/00
CPCB01J37/084B01J37/0036B01J27/02C07C67/08C10L1/02C11C3/003Y02E50/10
Inventor 于贺伟曹云龙魏伟李鹤遥李芝澳刘美雪万守强吴金轲邢鹏宇
Owner QILU UNIV OF TECH
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