A kind of method for upgrading lignin heavy oil to prepare bio-oxygenated fuel

A technology of oxygenated fuel and heavy oil, which is applied in the field of modification and upgrading of lignin bio-oil, upgrading of low-value lignin heavy oil to prepare high-grade biological oxygenated fuel, and can solve the problem of easy coking and low efficiency of the catalyst and other problems, to achieve high energy utilization rate, suppress coking in the process, and achieve the effect of sufficient combustion

Active Publication Date: 2020-07-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the highly unsaturated structural characteristics of lignin heavy oil, the low efficiency of the modification and upgrading process, and the easy coking of catalysts, there are few technical reports on the modification of lignin heavy oil.

Method used

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  • A kind of method for upgrading lignin heavy oil to prepare bio-oxygenated fuel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Ni 5 / Preparation of MgO-550 catalyst

[0033] Supported catalyst Ni 5 / MgO-550 is prepared by a two-step process:

[0034] (1) Preparation of MgO carrier: 92 grams of MgCl 2 ·6H 2O was fully dissolved in 100 mL of deionized water, and then ammonia water was added dropwise to the above solution under vigorous stirring until no new precipitates occurred. The obtained white precipitate was separated by filtration and washed repeatedly with deionized water at 50 °C until the washing liquid was washed with AgNO 3 The solution does not detect Cl - . The obtained white solid was dried in an oven at 120° C., and then transferred to a muffle furnace for calcination at 850° C. for 4 hours to obtain the MgO catalyst carrier.

[0035] (2) 7.75 grams of Ni(NO 3 ) 2 Dissolved in 50mL deionized water, and then to the resulting Ni(NO 3 ) 2 50 g of MgO carrier was added to the solution, and the resulting green paste was fully dried at 120°C and then transferred t...

Embodiment 2

[0036] Example 2: Ni 20 / MgO-850 catalyst preparation

[0037] Supported catalyst Ni 20 / MgO-850 is also prepared by a two-step process

[0038] (1) Preparation of MgO carrier: The preparation method of MgO carrier is the same as the process and Example 1.

[0039] (2) 62.03 grams of Ni(NO 3 ) 2 Dissolved in 200mL deionized water, and then to the resulting Ni(NO 3 ) 2 The solution was added with 100 g of MgO carrier, and the resulting green paste was fully dried at 120°C and then transferred to a muffle furnace, calcined at 850°C for 4 hours, and then heated by 5% H 2 and 95%N 2 In the reducing gas atmosphere formed, the reduction is carried out at 650°C for 4 hours, and the gray-black solid obtained at last is Ni 20 / MgO-850 catalyst.

Embodiment 3

[0040] Embodiment 3: Catalyst Ni 15 / MgO-SiO 2 Preparation of -650

[0041] Supported catalyst Ni 15 / MgO-SiO 2 -650 was prepared by a two-step process:

[0042] (1) Preparation of catalyst carrier: 81.2 grams of MgCl 2 ·6H 2 O and 48.8 g Na 2 SiO 3 Fully dissolve in 100mL deionized water, and then add ammonia water dropwise to the above solution under vigorous stirring until no new precipitate occurs. The obtained white precipitate was separated by filtration and washed repeatedly with deionized water at 50 °C until the washing liquid was washed with AgNO 3 The solution does not detect Cl - . Dry the obtained white solid in an oven at 120°C, and then transfer it to a muffle furnace for calcination at 550°C for 5 hours to obtain MgO-SiO 2 Catalyst carrier.

[0043] (2) 23.25 grams of Ni(NO 3 ) 2 Dissolved in 50mL deionized water, and then to the resulting Ni(NO 3 ) 2 Add 50 g of MgO-SiO to the solution 2 Carrier, the resulting green paste was fully dried at 12...

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Abstract

The invention discloses a method for preparing biological oxygenated fuel through lignin heavy oil upgrading. For technical problems of high oxygen content, low pH value and other characteristics of existing lignin heavy oil and inactivated catalysts caused by easy coking during bio-oil modification, the method mixes the lignin heavy oil and a non-noble metal catalyst supported by reaction media and alkaline carriers to perform reaction for 1-5 h at a temperature of 120-160 DEG C under a condition of 1-4 MPa hydrogen pressure, so that a catalyst can be separated, and the reaction media can beremoved, and therefore, the efficient catalytic upgrading of the lignin heavy oil can be realized, and high-grade bio-oxygenated fuel can be obtained; and pH values and calorific values can be increased, and oxygen content, oxygen to carbon atomic ratio and other key performance can be reduced. The method has significant advantages of being cheap and easy in catalyst obtaining, mile in reaction condition and obvious in lignin heavy oil performance enhancement, and can realize recycling; and the method is simple in technology operation and can realize intermittent and continuous production.

Description

technical field [0001] The present invention relates to the modification and upgrading of lignin bio-oil, in particular to a method for preparing high-grade bio-oxygenated fuel by upgrading low-value lignin heavy oil by hydrogenation modification using a cheap loaded catalyst, It belongs to the field of new energy and renewable energy technology development and efficient utilization. Background technique [0002] Since the last century, with the support of fossil resources such as coal, oil, and natural gas, human civilization has been greatly developed. However, the above-mentioned large amount of primary energy consumption has also brought side effects such as energy crisis, greenhouse effect, acid rain, PM2.5 and other environmental crises. Therefore, under the framework of the concept of sustainable development, how to seek low-carbon, low-pollution renewable alternative energy has become the consensus of all countries in the world. [0003] Biomass is the only renewab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/46C10G45/48C10G45/04C10G45/06C10L1/02B01J23/78B01J23/83B01J23/89
CPCB01J23/002B01J23/78B01J23/83B01J23/8946C10G45/04C10G45/06C10G45/46C10G45/48C10G2300/202C10L1/02
Inventor 龙金星李浩维李雪辉李宣马宏卫
Owner SOUTH CHINA UNIV OF TECH
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