Ceria-zirconium solid solution and its preparation method using biological template
A technology of cerium-zirconium solid solution and biological template, which is applied in the fields of chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem that cerium-zirconium solid solution methods have never been reported, affect cigarette smoking quality, and blending ratio Low-level problems, to achieve good economic and social benefits, high ignition activity, and stable performance
Active Publication Date: 2015-09-09
CHINA TOBACCO YUNNAN IND
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Problems solved by technology
In the articles published by Li Jian and others (Guangxi Light Industry, 2009, (2): 46-47), the cell wall substances in tobacco stems, including cellulose, hemicellulose, lignin and pectin, etc. More low-level aldehydes, catechols, alkyl catechols, and methanol are produced, which seriously affect the smoking quality of cigarettes, resulting in a relatively low blending ratio of cut stems in cigarette formula in China, resulting in idle cigarettes Large waste of stems
[0007] The method of preparing cerium-zirconium solid solution with biological template has never been reported
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Embodiment 1
[0036] A method for preparing a cerium-zirconium solid solution using a biological template, comprising the following steps:
[0037] (1) Cut the tobacco plant stalks after just baking into shredded stems, get 10g and soak them in 5% HCl for 2 days, then dehydrate through dehydrated ethanol gradient, use 15g precursor solution (wherein the molar ratio Ce(NO) in a beaker 3 ) 3 :ZrO(NO 3 ) 2 :ammonia water=0.5:0.5:4, just dissolved in water) mixed and soaked for 3 days.
[0038] (2) Filtration to obtain cut stems doped with cerium-zirconium solid solution, and drying in an oven at 90° C. for one day to obtain the initial solid product.
[0039] (3) The obtained solid product is put into a muffle furnace and calcined at a high temperature of 500° C. to obtain a cerium-zirconium solid solution.
[0040] The prepared cerium-zirconium solid solution has a porous structure with a specific surface area of 11.05 m 2 / g, the pore volume is 0.007cm 3 / g, the pore diameter is 4.86...
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Abstract
The invention relates to a cerium-zirconium solid solution prepared from a biological template. The microstructure of the cerium-zirconium solid solution on morphology is copied from a microstructure of plant tissue. The invention further relates to a preparation method of the cerium-zirconium solid solution, including the steps: (1) soaking the plant tissue with hydrochloric acid, and performing filtration and dehydration to obtain the biological template; (2) soaking the biological template obtained by the step (1) with precursor solution which is an aqueous solution or ethanol solution containing cerium source, zirconium source and precipitating agent; (3) filtering the mixture of the step (2), and retaining and drying the solid to obtain an initial solid product; (4) performing high-temperature calcination on the solid product obtained by the step (3) to obtain the cerium-zirconium solid solution. The cerium-zirconium solid solution prepared by the preparation method is a pollution-free, recyclable and repeatable catalyst which has stability at high temperatures and good economic and social benefits.
Description
technical field [0001] The invention belongs to the technical field of cerium-zirconium solid solution and preparation method thereof, and in particular relates to a high-activity cerium-zirconium solid solution catalyst prepared by using tobacco plants as biological templates and a preparation method thereof. Background technique [0002] A solid solution refers to a solid crystal in which atoms (compounds) of one (or several) components dissolve into the lattice of another component while still maintaining the lattice type of the other component. [0003] Cerium-zirconium solid solution plays an important role in the field of catalytic purification due to its good oxygen storage and release properties and thermal stability. The redox properties of cerium-zirconium solid solutions are closely related to the oxygen vacancy concentration, mobility of oxygen vacancies, surface area, and the formation of anion defects in cerium-zirconium solid solutions. In order to further im...
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IPC IPC(8): B01J23/10B01J35/02B01J35/00
Inventor 朱东来韩熠张伟巩效伟张霞李寿波王家强王伟和佼
Owner CHINA TOBACCO YUNNAN IND