Method for producing second-generation biodiesel by hydrogenation production of illegal cooking oil

A biodiesel and waste oil technology, which is applied in the fields of biofuel, fatty acid hydrogenation, chemical instruments and methods, etc., to achieve the effects of reducing hydrogen consumption, improving selectivity and high cetane number

Active Publication Date: 2014-04-30
NANJING KANG XIN CHENG BIOLOGICAL TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a method for producing second-generation biodiesel by hydrogenation of waste oil as a raw material for the practical problems of increasing demand for new energy sources and the existence of a large amount of waste oil, making full use of loaded transition metal phosphide catalysts Precious metal-like properties, directly convert the main components of waste oil, triglycerides and fatty acids, into oxygen-free alkanes, the cetane number of the product is as high as 100, the combustion calorific value reaches 49.2MJ / kg, and the tail gas pollutant content is low ; At the same time, the process does not use strong acids and alkalis that pollute the environment, is clean and environmentally friendly, and has good economic and social benefits

Method used

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  • Method for producing second-generation biodiesel by hydrogenation production of illegal cooking oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare 120mL impregnation solution containing 75.5 grams of nickel hypophosphite, and impregnate an equal volume in 100 grams of macroporous SiO 2 The carrier (Qingdao Ocean Chemical Co., Ltd.) was placed at room temperature for 2 hours, and then placed in a vacuum oven at 60°C for 4 hours. The obtained sample was placed in a tube furnace and treated with nitrogen at 250°C for 3 hours to obtain the catalyst Ni 2 P / SiO 2 (C1, active component NiO: 16%).

[0022] Activity Evaluation of Catalyst C1

[0023] Catalyst hydrorefining activity evaluation was carried out on Tuochuan 100ml small-scale continuous hydrogenation reaction device. The reactor was a 24×800mm stainless steel tube, and the loading capacity of the catalyst was 100ml. The pretreated waste oil used for the evaluation was filled with 100ml of catalyst C1. In the hydrogenation reactor, connect the hydrogen, adjust the reaction pressure to 4.0MPa, the hydrogen flow rate is 75L / h, and the space velocity is ...

Embodiment 2

[0025] Get 73.9 grams of nickel nitrate [Ni(NO 3 ) 2 .6H 2 O] Completely dissolve in water to configure 120 immersion liquid, impregnate equal volume in 100 grams of macroporous SiO 2 The carrier was placed at room temperature for 2 hours, then placed in a forced air oven at 60 °C overnight, and then calcined in a muffle furnace at 500 °C for 4 h, and the calcined solid was cooled to room temperature and transferred to a tube-type quartz furnace, and then transferred Continuously feed hydrogen (H2) into a type quartz furnace, and gradually raise the temperature of the furnace to 450°C and keep it at 450°C for 4h to obtain the catalyst Ni / SiO 2 (C2, active component NiO: 16%),

[0026] The evaluation device, loading amount, raw materials, and experimental conditions used for catalyst C2 activity evaluation are exactly the same as those in Example 1, and the evaluation results are shown in Table 2.

Embodiment 3

[0028] Catalyst C3 is a CoMoS catalyst commonly used in industry. The evaluation device, loading amount, raw materials, and experimental conditions used for the activity evaluation are exactly the same as those in Example 1. The evaluation results are shown in Table 2.

[0029] The main components of table 1 waste oil (mass percentage wt%)

[0030]

[0031] Table 2 Distribution of waste oil hydrogenation products on different catalysts

[0032]

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Abstract

The invention belongs to a chemical technology and the technical field of a renewable energy source, and relates to a method for producing second-generation biodiesel by hydrogenation production of illegal cooking oil. The method comprises the following steps: firstly, carrying out pretreatments such as filtering, dewatering and desalting, on the collected illegal cooking oil; respectively carrying out reaction, such as hydrodeoxygenation, hydrogenation decarboxylation and hydrogenation decarbonylation, in the presence of a transition metal phosphide catalyst so as to obtain the second-generation biodiesel. By adopting the method, the noble metal property and excellent hydrogenation performance of the transition metal phosphide are fully utilized, the illegal cooking oil is directly converted into oxygen-free fat alkanes, no byproduct for polluting the environment is generated, meanwhile, the method has the advantages of simple process, is clean and environmental, low in energy consumption and the like, the obtained diesel is high in cetane number and low in condensation point, has good economic and social benefits, and has important practical significance on growing fuel requirements.

Description

technical field [0001] The invention belongs to the fields of petroleum processing, petrochemical industry and coal chemical industry, and relates to a solid hydrogenation catalyst used in the hydrogenation refining process of petroleum distillate oil (gasoline, kerosene and diesel oil, etc.) and coal tar. Background technique [0002] With the rapid economic development and the increasing demand for fossil fuels and the improvement of people's awareness of environmental protection, green renewable energy has become the focus of research, especially biodiesel. However, with a large population in my country, the development of biodiesel should not compete with the people for food. Oil, so the production of biodiesel is subject to certain restrictions from raw materials. [0003] Waste oil generally refers to all kinds of low-quality oils and fats that exist in daily life with extremely poor quality and hygiene, and whose moisture, peroxide value and acid value seriously exceed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/12C10L1/02B01J27/185
CPCY02E50/10
Inventor 刘理华刘书群孙登明王广健刘东杨振兴
Owner NANJING KANG XIN CHENG BIOLOGICAL TECH CO LTD
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