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Method for preparing liquid fuel by catalyzing lignin with Ni-ReOx/Al2O3

A technology for liquid fuel and lignin, which is used in the preparation of liquid hydrocarbon mixtures, the petroleum industry, and the treatment of hydrocarbon oil, etc., can solve problems such as difficult and efficient degradation and utilization, and achieve the effects of high yield, mild reaction conditions, and reduced catalytic costs.

Inactive Publication Date: 2019-07-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lignin is difficult to efficiently degrade and utilize due to its unique structural characteristics.

Method used

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  • Method for preparing liquid fuel by catalyzing lignin with Ni-ReOx/Al2O3
  • Method for preparing liquid fuel by catalyzing lignin with Ni-ReOx/Al2O3
  • Method for preparing liquid fuel by catalyzing lignin with Ni-ReOx/Al2O3

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 200 mg lignin model compound phenoxyethylbenzene, 20 mg catalyst Ni-ReO x / Al 2 o 3 (1wt%Ni, 2wt%Re), 30ml of water was added to a 100ml reactor, and hydrogen gas was introduced to replace the gas three times, then filled with hydrogen to 2.0MPa, heated to 180°C, and reacted for 3 hours. After the reaction, cool to room temperature, add ethyl acetate for extraction, and obtain the supernatant of the organic phase for chromatographic analysis. The conversion rate is 99.9%, the yield of ethylcyclohexane is 95.7%, and the yield of cyclohexane is 85.6%.

Embodiment 2-3

[0020] Other processing conditions and experimental steps are the same as in Example 1, but using different catalysts, the results are shown in Table 1. Table 1. Experimental results of the lignin model compound phenoxyethylbenzene catalyzed by different catalysts

[0021]

[0022] Compared with pure Ni / Al 2 o 3 and ReO x / Al 2 o 3 When catalytically converting lignin model compounds, the substrate conversion rate, ethylcyclohexane and cyclohexane yields are all low, only when Ni and ReO x Simultaneous loading of Ni-ReOx / Al 2 o 3 , higher yields of ethylcyclohexane and cyclohexane were obtained, indicating that Ni and ReOx have a synergistic catalytic effect.

Embodiment 4-8

[0024] Other process conditions and experimental steps are the same as in Example 1, but using different initial pressures, the results are shown in Table 2.

[0025] Table 2. At different initial pressures, Ni-ReO x / Al 2 o 3 (1wt%Ni, 2wt%Re) catalytic lignin model compound phenoxyethylbenzene experimental results

[0026]

[0027] As shown in Table 2, as the initial pressure increased, the yields of ethylcyclohexane and cyclohexane increased.

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Abstract

The invention relates to a method for preparing cycloalkane liquid fuel by catalyzing lignin with Ni-ReOx / Al2O3, and particularly relates to a method for preparing cycloalkane liquid fuel by the following steps: taking Ni-ReOx / Al2O3 as a catalyst, taking water as a reaction medium and hydrodeoxidizing various model compounds such as beta-O-4, alpha-O-4, 4-O-5 and lignin raw materials. According tothe method, a one-step catalytic conversion process is carried out under a mild condition, so that the preparation of the cycloalkane liquid fuel by the hydrogenation and deoxidation of lignin is achieved, and the yield is as high as more than 85%. According to the method, renewable natural biomass is used as a raw material, and the raw material is cheap and wide in source; inorganic acid and alkali are not required to be used in the reaction process, so that the generation of a large amount of acid liquor catalyzed by traditional lignin is avoided; the reaction condition is mild, the selectivity of cycloalkane products is high, and the catalyst has the advantages of longer service life, higher reaction activity, environmental friendliness and the like. The method provides a mild depolymerization strategy for preparing the liquid fuel from renewable lignin resources, and simultaneously opens up a new way for producing the liquid fuel by a non-petroleum route.

Description

technical field [0001] The present invention relates to a Ni-ReO x / Al 2 o 3 As a catalyst, the lignin model compound dimer and the lignin raw material are efficiently hydrodeoxygenated to prepare a liquid fuel under mild conditions. Background technique [0002] Lignin is the second largest natural polymer compound after cellulose in plants, and it is also the only non-petroleum resource that can provide renewable aryl compounds in nature. It mainly exists in paper industry wastewater and agricultural waste (Chem . Rev. 2015, 115, 11559). Due to the three-dimensional structure of lignin, it has the characteristics of high hardness, water insolubility, refractory degradation and stable chemical properties. The current utilization rate is still relatively low, which is undoubtedly a great waste. Therefore, the study of efficient biomass conversion technology to convert lignin into high value-added chemicals or liquid fuels can not only avoid a great waste of resources and...

Claims

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Application Information

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IPC IPC(8): C10G1/00C10G1/06
CPCC10G1/00C10G1/06C10G2300/1014C10G2300/70
Inventor 张波李昌志祁早娟季建伟王爱琴张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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