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Method for preparation of aromatic hydrocarbon by catalyzing hydrodeoxygenation of monocyclic phenolic platform compound under low hydrogen partial pressure

A hydrodeoxygenation and compound technology, which is applied in catalyst activation/preparation, hydrocarbon production from oxygen-containing organic compounds, carbon compound catalysts, etc., can solve the problems of expensive catalysts, high hydrogen pressure, easy carbon deposition and deactivation, etc., to achieve Effect of low hydrogen partial pressure, improved selectivity, and low cost

Inactive Publication Date: 2017-03-15
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to provide a method for the preparation of aromatics by catalytic monocyclic phenolic platform compound hydrodeoxygenation under low hydrogen partial pressure. 3 As a catalyst, it catalyzes the hydrogenolysis and cleavage of C-O bonds in monocyclic phenolic platform compounds, and realizes the transformation of monocyclic phenolic platform compounds into aromatic products. It has high catalytic activity and high deoxygenation efficiency, which is conducive to improving the selectivity of aromatics in the product. The hydrogen consumption of the hydrodeoxygenation process is reduced, the required hydrogen partial pressure is low, and the catalyst is cheap and reproducible, which solves the need for high hydrogen pressure in the reaction process in the prior art, high hydrogen consumption, and easy Deactivation due to carbon deposits and the high price of supported noble metal catalysts lead to the inhibition of large-scale applications

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  • Method for preparation of aromatic hydrocarbon by catalyzing hydrodeoxygenation of monocyclic phenolic platform compound under low hydrogen partial pressure
  • Method for preparation of aromatic hydrocarbon by catalyzing hydrodeoxygenation of monocyclic phenolic platform compound under low hydrogen partial pressure
  • Method for preparation of aromatic hydrocarbon by catalyzing hydrodeoxygenation of monocyclic phenolic platform compound under low hydrogen partial pressure

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1: MoO 3 Catalyst preparation

[0023] 0.01 mol of (NH 4 ) 6 Mo 7 o 24 .4H 2 O was dissolved in deionized water, and 10 times the molar equivalent of hydrochloric acid solution (0.1 molar hydrochloric acid solution) was added dropwise under magnetic stirring to form a white flocculent precipitate; the precipitate was placed in an oven at 105°C after standing for aging, filtering, and washing Drying in medium for 12h, then calcining at 500°C in air atmosphere in muffle furnace for 5 hours and then in reducing atmosphere (5vol.%H 2 +95vol%N 2 ) at 450-800°C for 2-24 hours.

Embodiment 2

[0025] The 1.0g MoO obtained in Example 1 was reduced at 500°C for 5h 3 Catalyst, the phenol of 2.0g (the mass concentration of phenol is 11.4%) and the n-octane of 25.0ml are put into the autoclave of 100ml band stirrer, with N 2 Replace the air in the kettle, fill with H 2 After boosting to 0.3MPa, fill with N 2 Until the pressure in the reactor reached 3.0 MPa, the reactor was sealed. Turn on the stirring paddle (700 rpm), raise the temperature of the reactor to 340° C. at a heating rate of 10° C. / min, and start timing the reaction. The reaction time is 5h. The yield of product benzene was 98% (see Table 1).

Embodiment 3－ Embodiment 16

[0027] With reference to Example 2, the difference is that the reaction time is 6h, and the reduction conditions (reduction temperature and time), consumption, and reaction parameters of the catalyst are different, and the gas phase is H in Example 16. 2 The mixture of +Ar, see Table 1, and the product yield also sees Table 1.

[0028] Table 1

[0029]

[0030]

[0031] In Table 1, reactant: phenol; solvent: n-octane; reaction time: 6h; stirring speed: 700rpm. In Example 2-Example 15, the gas phase is H 2 +N 2 The mixture; Gas phase is H in embodiment 16 2 +Ar mixture.

[0032]It can be seen from the examples that the method for preparing aromatics by catalytic monocyclic phenolic platform compound hydrodeoxygenation is carried out in a mixed gas of hydrogen and nitrogen or argon, preferably under high nitrogen partial pressure and low hydrogen partial pressure, and hydrogen partial pressure The pressure is 0.1-0.3Mpa. ; The reaction temperature is 300-360°C. Witho...

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Abstract

The invention discloses a method for preparation of aromatic hydrocarbon by catalyzing hydrodeoxygenation of a monocyclic phenolic platform compound under low hydrogen partial pressure. MoO3 is adopted as the catalyst to catalyze hydrogenolysis fracture of C-O bond in the monocyclic phenolic platform compound so as to realize transformation of the monocyclic phenolic platform compound to an aromatic hydrocarbon product, the catalytic activity is high, and the deoxygenation efficiency is high, thus being conducive to improving the selectivity of aromatic hydrocarbon in the product, and reducing hydrogen consumption of the hydrodeoxygenation process, the needed hydrogen partial pressure is low, and the catalyst is cheap and renewable, thereby solving the problems of need for high hydrogen pressure in the reaction process, high hydrogen consumption, and suppressed large-scale application caused by easy carbon deposit deactivation during reaction and high price of the loaded noble metal catalyst in the prior art.

Description

[0001] Technical field: [0002] The invention relates to the technical field of biomass liquid fuel and chemical product preparation, in particular to a method for preparing aromatic hydrocarbons by catalyzing hydrodeoxygenation of monocyclic phenolic platform compounds under low hydrogen partial pressure. [0003] Background technique: [0004] As the main component of biomass, lignin is the main by-product of lignocellulosic biomass hydrolysis and fermentation to ethanol industry and paper industry. Because it is not fully utilized, it has become an environmental pollutant and has brought great harm to the environment. huge pressure. Therefore, efficient conversion of lignin into liquid fuels or chemicals is of great significance for improving the utilization of biomass carbon resources and improving the economics of biomass utilization technologies. Generally, the conversion of lignin to hydrocarbon fuels or chemicals can be realized by catalytic depolymerization to obtain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C15/04C07C15/02B01J23/28
CPCY02P20/52Y02P20/584C07C1/20B01J23/28B01J37/18C07C2523/28C07C15/04C07C15/02
Inventor 张兴华马隆龙王铁军张琦徐莹陈伦刚王晨光
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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