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Method for preparing biocarbon solid acid catalyst and biodiesel

A solid acid catalyst, biodiesel technology, applied in physical/chemical process catalysts, chemical instruments and methods, biofuels, etc., can solve the problems of increased production cost, complex preparation process, fast catalyst deactivation, etc. The preparation process is simple and the effect of simplifying the pretreatment process

Inactive Publication Date: 2008-11-05
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the developed solid catalysts with good catalytic performance are noble metal catalysts, the preparation process is complicated, the cost is relatively expensive, the production cost is increased, and the catalyst deactivates quickly, and the regeneration conditions are harsh.

Method used

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  • Method for preparing biocarbon solid acid catalyst and biodiesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 30g of wood chips, wheat straw, bean stalks, corn stalks, rice stalks, lignin, rice husks, walnut shells, and apricot husks and put them into a carbonization furnace respectively, feed nitrogen gas and carbonize at 380°C for 4 hours to obtain dark brown solids, and then Oxidize at 300°C for 0.5h, take 5g of dark brown solid and sulfonate concentrated sulfuric acid at a constant temperature of 140°C for 2 hours, after the reaction, cool the solid naturally and add it to 250ml of distilled water for filtration, and then wash it with 100°C distilled water to medium The bio-based carbonaceous solid acid catalyst can be obtained after drying.

[0022] Catalytic effect: put 14g of methanol, 15.86g of oleic acid and 1g of carbonaceous catalyst in the continuous distillation-water separation esterification device to carry out esterification reaction at 90°C (reboiler temperature is 85°C), after 2 hours of reaction Obtain methyl oleate yield and esterification conversion ra...

Embodiment 2

[0026] Take 30g of chips and put them into a carbonization furnace, feed nitrogen gas and carbonize at 400°C for 4 hours to obtain a dark brown solid, then oxidize at 300°C for 0.5h, take 5g of dark brown solid and concentrated sulfuric acid for sulfonation at a constant temperature of 130°C for 5 hours After the reaction, the solid was naturally cooled and added to 250 ml of distilled water to filter, then washed with 100°C distilled water until neutral, and dried to obtain a bio-based carbon solid acid catalyst.

[0027] Catalytic effect: put 14g of methanol, 15.86g of oleic acid and 1g of carbonaceous catalyst in the continuous distillation-water separation esterification device to carry out esterification reaction at 90°C (reboiler temperature is 85°C), after 2 hours of reaction 15.21 g of methyl oleate was obtained, and the esterification rate was 95.90%.

Embodiment 3

[0029] Take 30g of sawdust and put it into a carbonization furnace, feed nitrogen gas and carbonize at 350°C for 15 hours to obtain a dark brown solid, then oxidize it at 250°C for 1 hour, take 5g of dark brown solid and concentrated sulfuric acid for sulfonation at a constant temperature of 150°C for 2 hours, After the reaction, the solid was naturally cooled and added to 250 ml of distilled water for filtration, then washed with 100°C distilled water until neutral, and dried to obtain a bio-based carbon solid acid catalyst.

[0030] Catalytic effect: put 14g of methanol, 15.86g of oleic acid and 1g of carbonaceous catalyst in the continuous distillation-water separation esterification device to carry out esterification reaction at 90°C (reboiler temperature is 85°C), after 2 hours of reaction 15.34 g of methyl oleate was obtained, and the esterification rate was 96.7%.

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Abstract

The invention pertains to the new material technical field, and relates to a method for preparing a carbonaceous solid acid catalyst and biodiesel by taking pure natural biological substances as raw materials. The method is characterized by: taking the pure natural and renewable biological substances as the raw materials; adopting the technical route and method of low-temperature carbonization firstly, oxidation secondly and sulfonation then according to the constituent and structural characteristics to prepare the bio-carbonaceous solid acid catalyst; and adopting a continuous rectification-water separating esterification reaction technology to produce the biodiesel by carrying out the catalytic esterification reaction of a free fatty acid or waste oil and short chain alcohol. The raw materials adopted by the invention are rich in resources, low in price, pure natural and renewable, which pertains to waste utilization; the preparation technology is simple with moderate and controllable reaction conditions; the catalyst has the advantages of high activity, good stability, easy recycling and no corrosion to equipment, which is an really environment-friendly catalyst, thus being applicable to the large scale industrial production of the biodiesel. The method can also be applied to a plurality of organic reactions such as alkylation, hydrolysis and hydration, etc.

Description

technical field [0001] The invention belongs to the technical field of new materials and new energy, and relates to a method for preparing a carbonaceous solid acid catalyst and biodiesel, in particular to a method for preparing a carbonaceous solid acid catalyst and biodiesel by using pure natural biomass as a raw material. Background technique [0002] Biodiesel is a clean renewable energy, a high-quality petroleum diesel substitute and the most representative biomass energy. In the next 10 years, biodiesel is expected to become an important fuel energy worldwide. [0003] At present, the methods for producing biodiesel all adopt chemical methods, that is, chemical catalytic methods such as acid method, alkali method and a two-step method combining the two. Acid catalysis can solve the problem of difficult utilization of raw materials with high acid value, but due to the use of homogeneous catalysts such as concentrated sulfuric acid, there are high requirements for equipm...

Claims

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Application Information

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IPC IPC(8): C10G3/00C07C67/08C07C67/03B01J27/053B01J21/18
CPCY02E50/13Y02E50/10Y02P20/584Y02P30/20
Inventor 王同华乌日娜修志龙潘艳秋银建中
Owner DALIAN UNIV OF TECH
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