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Apatite loaded platinum catalyst as well as preparation method and application thereof

A platinum catalyst, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as limited application and insufficient stability, and achieve high catalytic activity, good stability, and simple operation process. Effect

Inactive Publication Date: 2016-10-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But many noble metal / reducible supported catalysts are not stable enough in reformed gas (Zalc, J.M.; Sokolovskii, D.G.; D.G.J.Catal.2002,209,169.), in addition, due to expensive precious metals and rare earth elements (CeO 2 , La 2 o 3 ) also limits its practical application

Method used

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  • Apatite loaded platinum catalyst as well as preparation method and application thereof
  • Apatite loaded platinum catalyst as well as preparation method and application thereof
  • Apatite loaded platinum catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare 1% Pt / HAP-X (the number in front of Pt indicates the mass percentage of Pt in the catalyst), where X is the molar ratio of Ca / P in the catalyst obtained according to the following preparation method. For example, HAP-1.76 means that the molar ratio of Ca / P in the catalyst is 1.76.

[0028] Weigh 7.87g Ca(NO 3 ) 2 4H 2 O was dissolved in 100ml distilled water, weighed 2.64g (NH 4 ) 2 HPO 4 Dissolve in 100ml distilled water, stir to make it dissolve completely, adjust the pH value of the solution to 10.5 respectively with commercially available 25%-28% ammonia water, under the condition of stirring, use constant flow pump to make (NH 4 ) 2 HPO 4 The solution was slowly added dropwise to the Ca(NO 3 ) 2 4H 2 O solution, after the dropwise addition, transfer the mixed solution to a 90°C water bath, continue to stir, take it out after 2 hours, place it at room temperature for aging for 6 hours, wash and filter the precipitate, dry it in an oven at 60°C for ...

Embodiment 2

[0030] 1%Pt / FAP and 1%Pt / ClAP were prepared, where FAP stands for fluoride ion substituted hydroxyapatite and ClAP stands for chloride ion substituted hydroxyapatite.

[0031] Weigh 7.87g Ca(NO 3 ) 2 4H 2 O was dissolved in 100ml distilled water, weighed 2.64g (NH 4 ) 2 HPO 4 and 0.247g NH 4 F or 0.357g NH 4 Cl was dissolved in 100ml of distilled water, stirred to make it dissolve completely, and the pH value of the solution was adjusted to 10 with commercially available 25%-28% ammonia water, and under the condition of stirring, the (NH 4 ) 2 HPO 4 The solution was slowly added dropwise to the Ca(NO 3 ) 2 4H 2 O solution, after the dropwise addition, transfer the mixed solution to a 90°C water bath, continue to stir, take it out after 2 hours, place it at room temperature for aging for 6 hours, wash and filter the precipitate, dry it in an oven at 60°C for 12 hours, and then dry it at 500°C Calcined in furnace air for 4 hours to obtain carrier FAP or ClAP. After ...

Embodiment 3

[0033] Through Ca(NO 3 ) 2 Modification changes the Ca / P molar ratio of the catalyst.

[0034] 0.12g Ca(NO 3 ) 2 4H2O dissolved in 1ml H 2 In O, add 0.5g HAP-1.58, stir evenly, impregnate at room temperature for 24 hours, dry in an oven at 60°C for 12 hours, and bake in air in a muffle furnace at 500°C for 4 hours to obtain HAP-1.74.

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Abstract

The invention relates to a catalyst for a carbon monoxide water gas shift (WGS) reaction, in particular to preparation of hydroxyapatite (HAP) and halogen-substituted apatite (FAP, ClAP and BrAP) by virtue of a co-precipitation method. Platinum is introduced by virtue of a dipping method. The carrying capacity of the platinum in the catalyst is 0.3-5% of the total mass of the catalyst. The regulation and control of the activity of the catalyst can be realized by controlling Ca / P of a carrier. The catalyst prepared by the method is used for performing a water gas shift reaction in a typical reformed gas, has high activity and selectivity and good high-temperature stability, and shows higher activity compared with that of a catalyst in which a noble metal is loaded to a reducible rare earth oxide carrier (CeO2) under the same noble metal carrying capacity.

Description

technical field [0001] The invention relates to a water vapor shift reaction catalyst, in particular to an apatite-loaded platinum catalyst used for carbon monoxide water vapor shift (WGS) reaction and its preparation and application. Background technique [0002] The development of my country's economy has caused more and more serious environmental pollution, and environmental problems have become an important issue restricting my country's economic development. Fuel cells (such as PEMFC) are an ideal power generation mode, with outstanding advantages such as high energy conversion rate and non-polluting products. With the development of fuel cell technology, how to provide a cheap and practical hydrogen source for fuel cells has become one of the obstacles that currently limit their large-scale applications. Fuel reformed gas contains H 2 , CO, CO 2 and a small amount of fuel for conversion. H in low temperature fuel cells (such as PEMFC) 2 In the feed gas, the CO con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C01B3/16
CPCY02P20/52
Inventor 安德烈斯.约瑟夫.哥德巴赫苗登云徐恒泳
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI