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A kind of method utilizing poly 3-hydroxybutyrate to prepare liquid fuel

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

Active Publication Date: 2018-09-04
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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  • A kind of method utilizing poly 3-hydroxybutyrate to prepare liquid fuel
  • A kind of method utilizing poly 3-hydroxybutyrate to prepare liquid fuel
  • A kind of method utilizing 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 for preparing liquid fuel by using poly-3-hydroxybutyrate. The catalyst aluminum dihydrogen phosphate and poly-3-hydroxybutyrate are placed in a high-temperature and high-pressure reactor and reacted at 210-270°C for 3 ‑12 hours, liquid fuel is obtained. The present invention uses aluminum dihydrogen phosphate as a catalyst, and can convert poly-3-hydroxybutyrate into an oil product in one step at a mild temperature (210-270°C). This technical process is simple, easy to operate, and has industrial application prospects; The oil product yield is as high as 36.9 wt%, the mass content of hydrocarbon elements in the oil product is as high as 84.5% and 11.5%, and the calorific value is as high as 42 MJ / kg, which is equivalent to the calorific value of conventional commercial oxygenated gasoline; Under catalytic conditions, poly-3-hydroxybutyrate is mainly converted into hydrocarbons in the form of decarboxylation, and the decarboxylation rate is as high as 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 Patents(China)
IPC IPC(8): C10G3/00
CPCY02P30/20
Inventor 康世民蔡鉴马智行王泽潘王勇
Owner DONGGUAN UNIV OF TECH