Method for preparing alkane fuel with high cetane number by catalyzing plant oil or long-chain fatty acid by Ru catalyst and application thereof

A long-chain fatty acid and high-hexadecane technology is applied in the preparation of biofuels, liquid hydrocarbon mixtures, and biological raw materials. It can solve the problems of poor alkane selectivity, high reaction temperature, and low catalyst activity. The effect of mild reaction conditions and high yield

Inactive Publication Date: 2013-01-16
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problems of the direct hydrodeoxygenation or decarboxylation of oils to generate alkanes ar

Method used

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  • Method for preparing alkane fuel with high cetane number by catalyzing plant oil or long-chain fatty acid by Ru catalyst and application thereof
  • Method for preparing alkane fuel with high cetane number by catalyzing plant oil or long-chain fatty acid by Ru catalyst and application thereof
  • Method for preparing alkane fuel with high cetane number by catalyzing plant oil or long-chain fatty acid by Ru catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 0.2g of long-chain fatty acid and mix it with 20ml of solvent (see Table 1 for details), put it into a 50mL reactor, and then put in 0.1g of catalyst (see Table 1 for details). Replace the air in the kettle with hydrogen for three to four times, and then fill it with hydrogen at a certain pressure to minimize the air content in the kettle, especially the oxygen content, so as to maintain the reducing atmosphere in the kettle. Turn on the stirring device to about 1000 rpm, then heat to a certain temperature (see Table 1 for details) and maintain it for a certain period of time. After the reaction was completed, it was cooled to room temperature, and the liquid product was collected. The liquid product was analyzed for its chemical composition by GC-MS and GC. The results are shown in Table 1 for the results of experiments numbered 1-13.

Embodiment 2

[0032] Weigh 10g of mixed long-chain fatty acids (5g stearic acid + 5g palmitic acid) and mix with 10mL solvent (see Table 1 for details), put it into a 50mL reactor, and then add 5g of catalyst (see Table 1 for details). Replace the air in the kettle with nitrogen for three to four times, and then fill it with hydrogen at a certain pressure to minimize the air content in the kettle, especially the oxygen content, so as to maintain the reducing atmosphere in the kettle. Turn on the stirring device to about 1000 rpm, then heat to a certain temperature (see Table 1 for details) and maintain it for 24 hours. After the reaction was completed, it was cooled to room temperature, and the liquid product was collected. The liquid product was analyzed for its chemical composition by GC-MS and GC. The results are shown in Table 1, the results of experiment No. 14.

Embodiment 3

[0034] Weigh 0.2g mixed long-chain fatty acid (0.1g stearic acid + 0.1g palmitic acid) and mix with 60mL solvent (see Table 1 for details), put it into a 100mL reactor, and then put in 0.1g catalyst (see Table 1 for details ). Replace the air in the kettle with nitrogen for three to four times, and then fill it with hydrogen at a certain pressure to minimize the air content in the kettle, especially the oxygen content, so as to maintain the reducing atmosphere in the kettle. Turn on the stirring device to about 1000 rpm, then heat to a certain temperature (see Table 1 for details) and maintain it for 12 hours. After the reaction was completed, it was cooled to room temperature, and the liquid product was collected. The liquid product was analyzed for its chemical composition by GC-MS and GC. The results are shown in Table 1 for the results of experiment No. 15.

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Abstract

The invention provides a method for preparing alkane fuel with a high cetane number by catalyzing plant oil or long-chain fatty acid by a Ru catalyst, which comprises the following steps: (1) mixing plant oil or long-chain fatty acid with a solvent in proportion; (2) adding a catalyst with the hydrogenation function into the mixed solution in step (1); (3) reacting in reducing atmosphere to obtain long-chain alkane with a main component of C15-C18. The method for catalyzing plant oil or long-chain fatty acid by a Ru catalyst provided by the invention has a high fatty acid conversion rate and a high alkane yield. In addition, the method of the invention is simple in process, convenient for operation, and mild in reaction condition; the whole reaction process is basically free of carbon deposition; the catalyst is cheap, easily available, and suitable for multi-time repeated use without activity reduction. The product of the invention can be used directly as diesel oil, and has important economic and social meaning for vehicle liquid fuel sustainable supply.

Description

technical field [0001] The invention relates to the field of fine chemical industry, in particular to a method for preparing high cetane number alkane fuel by catalyzing vegetable oil or long-chain fatty acid with Ru series catalyst and its application. Background technique [0002] With the development of today's society, energy consumption is increasing rapidly, fossil energy is becoming increasingly exhausted, and the whole world is facing the problem of energy shortage. Renewable resources, as a kind of green energy, have drawn more and more attention from people. Biodiesel is a renewable energy source with great development potential, and its raw materials are mainly vegetable oil, animal fat, and waste cooking oil. Traditionally, biodiesel is prepared by transesterifying oils composed of fatty acids and glycerol into methyl or ethyl ester oxygenates. The biodiesel prepared by this process has high oxygen content and poor fluidity at low temperature. In recent years,...

Claims

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Application Information

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IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 张颖郭建华傅尧
Owner UNIV OF SCI & TECH OF CHINA
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