Method of using poly-3-hydroxybutyrate to prepare liquid fuel

A hydroxybutyrate, liquid fuel technology, which is applied in the preparation of liquid hydrocarbon mixtures, biological raw materials, petroleum industry, etc., can solve problems such as catalyst deactivation, and achieve the effects of convenient operation, excellent reusability and simple process flow

Active Publication Date: 2017-08-18
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method of using solid aluminum dihydrogen phosphate as a catalyst to catalyze decarboxylation of poly 3-hydroxybutyrate under mild conditions, and convert renewable poly 3-hydroxybutyrate into low-molecular hydrocarbons It solves the harsh conditions (such as high temperature, or high-concentration strong acid catalyst, or catalytic hydrogenation, etc.) required for the preparation of high-grade liquid fuels from biomass resources and the serious deactivation of catalysts in the process of repeated use.

Method used

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  • Method of using poly-3-hydroxybutyrate to prepare liquid fuel
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  • Method of using poly-3-hydroxybutyrate to prepare liquid fuel

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Embodiment 1

[0021] In this embodiment, the specific steps for preparing liquid fuels by using aluminum dihydrogen phosphate to catalyze the conversion of poly-3-hydroxybutyrate are as follows:

[0022] (1) Take 35.0 g of poly-3-hydroxybutyrate and 35.0 g of aluminum dihydrogen phosphate into a 300 mL high-temperature, high-pressure, acid-resistant reaction kettle and mix them evenly. Nitrogen gas is introduced to remove the air in the reaction kettle, and the reaction kettle is sealed. The temperature was programmed to rise for 45 minutes to 240 degrees, and kept at a constant temperature of 240 degrees for 6 hours. After the reaction was completed, it was cooled to room temperature, and the poly 3-hydroxybutyrate was 100% converted, and 74% of the oxygen in the poly 3-hydroxybutyrate was converted to carbon dioxide Formation was removed, and the used catalyst and oil product were obtained by solid-liquid separation. The quality of the oil product was 12.9 g, and the yield was as high as 3...

Embodiment 2

[0032] Take 39 g of poly-3-hydroxybutyrate and 13 g of aluminum dihydrogen phosphate into a 300 mL high-temperature and high-pressure reaction acid-resistant kettle and mix them evenly. Nitrogen gas is introduced to remove the air in the reaction kettle, and the reaction kettle is sealed. The temperature was raised to 270° C., and kept at a constant temperature of 270° C. for 6 hours. After the reaction, it was cooled to room temperature to obtain an oil product.

Embodiment 3

[0034] Take 35 g of poly-3-hydroxybutyrate and 35 g of aluminum dihydrogen phosphate into a 300 mL high-temperature and high-pressure reaction acid-resistant kettle and mix them evenly. Nitrogen gas is introduced to remove the air in the reaction kettle, and the reaction kettle is sealed. The temperature was programmed to rise to 210°C at 5°C / min, and kept at a constant temperature of 210°C for 12 hours. After the reaction was completed, it was cooled to room temperature to obtain an oil product.

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Abstract

The invention provides a method of using poly-3-hydroxybutyrate to prepare a liquid fuel; method comprises: adding the catalyst aluminum dihydrogen phosphate and poly-3-hydroxybutyrate into a high-temperature high-pressure reactor, reacting at 210-270 DEG C for 3-12 hours to obtain the liquid fuel. Aluminum dihydrogen phosphate is used as a catalyst herein, poly-3-hydroxybutyrate may be further catalytically converted at the mild temperature (210-270 DEG C) to prepare an oil product; the technical process of the method is simple and convenient to perform, and the method has industrial application prospect; the yield of oil the product is up to 36.9% by weight, the contents of carbon and hydrogen in the oil product are up to 84.5% by weight and 11.5% by weight respectively, and caloric value is up to 42 MJ/kg, which is equal to that of conventional commercial oxygen-bearing gasoline; under catalysis of the aluminum dihydrogen phosphate, the poly-3-hydroxybutyrate is converted into hydrocarbons mainly in decarboxylation form, and the decarboxylation rate is up to 73%.

Description

technical field [0001] The invention relates to the technical field of preparation of renewable liquid fuels, in particular to a method for preparing liquid fuels by using aluminum dihydrogen phosphate to catalytically convert poly-3-hydroxybutyrate. Background technique [0002] With the depletion of petrochemical resources, the development and utilization of renewable energy (such as bio-based liquid fuel) is an important way of future energy utilization. Poly-3-hydroxybutyrate is a renewable bio-based raw material found in almost all prokaryotes. Similar to starch in plants, poly-3-hydroxybutyrate is a carbon source and energy storage moiety in microorganisms. The structural monomer of poly 3-hydroxybutyrate is crotonic acid (C 4 h 6 o 2 ), is a C4 unsaturated fatty acid containing double bonds and carboxyl groups in the molecule. Theoretically, poly-3-hydroxybutyrate or crotonic acid could be converted into a hydrocarbon fuel by catalytic pyrolytic decarboxylation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00
CPCY02P30/20C10G3/44
Inventor 康世民蔡鉴马智行王泽潘王勇
Owner DONGGUAN UNIV OF TECH
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