Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method and application of load type NaAlO2/MgO solid base catalyst for synthesizing biodiesel

A solid base catalyst and synthetic biology technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, biofuels, etc., can solve the loss of active components, poor stability, and volatile Live and other issues, to achieve long cycle life, avoid easy deactivation, and good stability

Inactive Publication Date: 2012-07-18
TIANJIN UNIV
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the solid acid catalyst has shown certain activity in the transesterification reaction, the reaction needs to be carried out at higher temperature and pressure; compared with the solid acid catalyst, the condition of the solid base catalyzed transesterification reaction is milder and the yield is high, but Easy to inactivate
At present, the literature reports that a variety of solid base catalysts (alkali metals, alkaline earth metal oxides and supported catalysts, hydrotalcite-type solid bases, zeolite molecular sieves, resins, etc.) are used to catalyze the synthesis of biodiesel. When these catalysts are used in the synthesis of biodiesel , although it has high activity, but its stability is not good, its service life is short, and it is difficult to be used in industrialization; some supported catalysts are lost due to the dissolution of active components into methanol, resulting in a sharp drop in activity when they are reused

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 15g of sodium metaaluminate (NaAlO 2 ) was dissolved in deionized water to make a solution, according to NaAlO 2 The molar ratio of MgO powder and MgO powder is 1:3. Weigh MgO powder and add it to NaAlO 2 In the aqueous solution, stir for 2 hours, stand and age for 12 hours, remove excess water by rotary evaporation, and then calcined at 800 ° C to obtain supported NaAlO 2 / MgO solid base.

[0019] Supported NaAlO prepared under the above conditions 2 / MgO solid base is catalyst, adopts batch reactor to prepare biodiesel, raw material is the rapeseed oil and methyl alcohol of 45g, alcohol-oil mol ratio is 15: 1, and catalyst addition is 8wt% (taking raw oil as benchmark), reaction The temperature was 65°C, and the reaction was carried out under normal pressure for 3 hours. As a result, the yield of biodiesel (methyl ester) was measured to be 86%; 2 / MgO solid base catalyst recovery, and the recovered catalyst can be directly reused without any treatment. The results...

Embodiment 2

[0021] Use wet impregnation to prepare supported NaAlO according to the conditions of Example 1 2 After / MgO solid alkali, plasma treatment is carried out again, with air as the working medium, the discharge gap is adjusted to 5mm, the working voltage is 30V, and the supported NaAlO is obtained after plasma treatment for 10 minutes. 2 / MgO solid base catalyst,

[0022] Supported NaAlO prepared under the above conditions 2 / MgO solid base is a catalyst, and a batch reactor is used to prepare biodiesel. The raw material is 45g of rapeseed oil and methanol, and the molar ratio of alcohol to oil is 15:1. The amount of catalyst added is 8wt%. The reaction was carried out for 3 hours, and the yield of biodiesel was measured to be 92.5%. After the reaction, the NaAlO can be realized by simple filtration 2 / Recovery of MgO solid base catalyst. And it can be directly reused. The results show that the solid base catalyst is used more than 10 times, and the yield of methyl ester is ...

Embodiment 3

[0024] Prepare supported NaAlO by the condition of embodiment 2 2 / MgO solid base catalyst, but the working voltage of the plasma treatment is 20V. A batch reactor is used to prepare biodiesel, the raw material is 45g of rapeseed oil and methanol, the molar ratio of alcohol to oil is 15:1, the catalyst addition is 8wt%, the reaction temperature is 65°C, and the reaction is carried out for 3h under normal pressure. The result is measured The yield of biodiesel was 89%. It shows that too low operating voltage during plasma treatment will affect the activity of the catalyst and the yield of biodiesel.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method and application of a load type NaAlO2 / MgO solid base catalyst for synthesizing a biodiesel, belonging to the technical field of synthesizing biodiesel. The preparation method of the catalyst comprises the following steps of: dipping NaAlO2 powder and MgO powder with a wet method to prepare NaAlO2 / MgO, and then processing by plasma to obtain a load typesolid base NaAlO2 / MgO catalyst. The process for synthesizing the biodiesel by using the catalyst comprises the following steps of: adding oil and alcoholic substances with a certain molar ratio and the catalyst with a certain mass ratio into a reactor, reacting by stirring under the temperature of 30-220 DEG C and the normal pressure to 0.5MPa to obtain a mixture containing the biodiesel, and then filtering a solid catalyst, and standing for demixing to obtain the biodiesel and crude glycerol. The invention has the advantage that the catalyst is simple in preparation process, is used for synthesizing the biodiesel, and has high activity, long circular service life, no emission of waste liquid in the process and is environment-friendly.

Description

technical field [0001] The invention relates to a loaded NaAlO for synthesizing biodiesel 2 The preparation and application of the MgO / MgO solid base catalyst belong to the technical field of biodiesel synthesis. Background technique [0002] As a green, safe and renewable alternative energy source, biodiesel plays a very important role in ensuring the steady development of the world economy and reducing the pollution caused by fuel fossil energy to the earth's environment. So far, biodiesel can be prepared by physical or chemical methods, the latter being the main method, that is, using oil crops, wild oil plants, engineering microalgae and other aquatic vegetable oils and animal oils, waste cooking oil, etc. as raw materials, and methanol Or ethanol and other low-carbon alcohols undergo transesterification under catalysis or special process conditions to obtain long-chain fatty acid mono-alkyl esters. After separation, the long-chain fatty acid mono-alkyl esters can be us...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/04C11C3/10C10L1/02
CPCY02E50/13Y02E50/10
Inventor 李淑芬田松江唐韶坤王景娜冯日华
Owner TIANJIN UNIV