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PtO@MFI packaging structure catalyst for preparing synthesis gas through partial oxidation of methane and preparation method and application of catalyst

A technology of encapsulation structure and catalyst, which is applied in catalyst activation/preparation, molecular sieve catalyst, physical/chemical process catalyst, etc., can solve the problems of poor thermal stability and high cost of precious metal catalyst preparation, and improve the yield, catalyst activity and stability. Improve and reduce consumption

Inactive Publication Date: 2019-06-14
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high preparation cost and poor thermal stability of the current noble metal catalysts, and to provide a traditional supported PtO / SiO 2 Preparation method of MFI molecular sieve-encapsulated Pt-based catalyst prepared by hydrothermal crystallization. The catalyst shows high activity and anti-sintering performance for partial oxidation of methane to synthesis gas

Method used

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  • PtO@MFI packaging structure catalyst for preparing synthesis gas through partial oxidation of methane and preparation method and application of catalyst
  • PtO@MFI packaging structure catalyst for preparing synthesis gas through partial oxidation of methane and preparation method and application of catalyst
  • PtO@MFI packaging structure catalyst for preparing synthesis gas through partial oxidation of methane and preparation method and application of catalyst

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Experimental program
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Effect test

Embodiment 1

[0033] Catalyst preparation: weigh 0.03g H 2 PtCl 6 ·6H 2 O, dissolved in 1.5 ml deionized water to make a platinum salt solution; weigh 3 g of single crystal SiO with a size of 15 nm 2 , add the prepared chloroplatinic acid solution dropwise on the nano-silica, and stir well; ultrasonication for 1h, vacuuming for 1h to fully disperse the chloroplatinic acid on the silica; dry overnight in vacuum at 100°C , and then calcined in air at 400°C for 3h to obtain PtO / SiO 2 nanoparticles. Measure 10ml 25wt% TPAOH solution, add 50ml deionized water to make 60ml 0.2mol.L -1 solution; Weigh 2g PtO / SiO 2 Nanoparticles, dissolved in the prepared TPAOH solution, fully stirred, ultrasonic 2h to achieve maximum dispersion; the above solution was transferred to a 100ml polytetrafluoroethylene reactor, 170 ° C rotary hydrothermal crystallization 3d, rotating speed 60r / min; centrifuge the solution, wash it with excess deionized water until neutral; dry it in the air at 100°C overnight, an...

Embodiment 2

[0040] Catalyst preparation: weigh 0.03g PtN 2 o 6 , Dissolve it in 1.5ml deionized water to make a platinum salt solution; weigh 3g of single crystal SiO with a size of 20nm 2 , add the prepared platinum nitrate solution dropwise on the nano-silica, and stir thoroughly; ultrasonic for 1 hour, and vacuum for 1 hour to fully disperse the platinum nitrate solution on the silicon dioxide; dry overnight in vacuum at 100°C, Then calcined in air at 400°C for 3h to obtain PtO / SiO 2 nanoparticles. Measure 10ml 25wt% TPAOH solution, add 50ml deionized water to make 60ml 0.2mol L -1 solution; Weigh 2g PtO / SiO 2 Nanoparticles, dissolved in the prepared TPAOH solution, fully stirred, ultrasonic 2h to achieve maximum dispersion; the above solution was transferred to a 100ml polytetrafluoroethylene reactor, 170 ° C rotary hydrothermal crystallization 3d, rotating speed 60r / min; centrifuge the solution, wash it with excess deionized water until neutral; dry it in the air at 100°C overni...

Embodiment 3

[0046] Catalyst preparation: weigh 0.03g Pt 2 Cl 4 , Dissolve it in 1.5ml deionized water to make a platinum salt solution; weigh 3g of single crystal SiO with a size of 50nm 2 , add the prepared platinum chloride solution dropwise onto the nano-silica, and stir thoroughly; ultrasonic for 1 hour, and vacuum for 1 hour to fully disperse the platinum chloride solution on the silicon dioxide; dry in vacuum at 100°C overnight, and then calcined at 400 °C in air for 3 h to obtain PtO / SiO 2 nanoparticles. Measure 10ml 25wt% TPAOH solution, add 50ml deionized water to make 60ml 0.2mol L -1 solution; Weigh 2g PtO / SiO 2 Nanoparticles, dissolved in the prepared TPAOH solution, fully stirred, ultrasonic 2h to achieve maximum dispersion; the above solution was transferred to a 100ml polytetrafluoroethylene reactor, 170 ° C rotary hydrothermal crystallization 3d, rotating speed 60r / min; centrifuge the solution, wash it with excess deionized water until neutral; dry it in the air at 10...

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Abstract

The invention belongs to the technical field of methane catalytic conversion, and particularly discloses a packaging structure catalyst for preparing synthesis gas through partial oxidation of methaneand a preparation method of the catalyst. The packaging structure catalyst for preparing the synthesis gas through partial oxidation of methane is prepared from 1wt%-5wt% of active component metal Pt, and 95wt%-99wt% of a carrier. The preparation method of the catalyst includes the steps that nano-silica, namely PtO / SiO2 nanoparticles, for loading the active component Pt is prepared; with the PtO / SiO2 nanoparticles as a silicon source, an MFI structure molecular sieve is synthesized through a template; and the MFI structure molecular sieve is roasted to obtain the core-shell structure catalyst with the active component Pt being packaged in the molecular sieve, namely PtO@MFI. The prepared PtO@MFI catalyst has high activity and stability in reaction of preparing the synthesis gas through partial oxidation of methane, and through the special packaging structure, the stability of the catalyst and the sintering resistance of the active component are further improved.

Description

technical field [0001] The invention belongs to the technical field of methane catalytic conversion, and in particular discloses a PtO@MFI encapsulated structure catalyst for producing synthesis gas by partial oxidation of methane, a preparation method and application thereof. Background technique [0002] The high pollution of coal resources and the limitation of oil resources promote the development and utilization of natural gas resources. The main component of natural gas is methane, and the economically feasible way to utilize methane is to convert it into synthesis gas through catalytic conversion. The reaction of partial oxidation of methane to synthesis gas is mild and exothermic, which is more economical in terms of energy; the reactor for partial oxidation of methane is small in size and requires less investment in equipment; 2 / CO, this ratio is very favorable for downstream products especially methanol and Fischer-Tropsch synthesis. At present, there are mainly...

Claims

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Application Information

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IPC IPC(8): B01J29/44B01J37/08C01B3/40
CPCY02P20/52
Inventor 丁传敏王俊文马立超张冰孟园园李宇峰郭静
Owner TAIYUAN UNIV OF TECH
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