Rh-based catalyst loaded on titanium dioxide nanorod as well as preparation method and application thereof

A technology of titanium dioxide and nanorods, applied in the field of noble metal Rh catalysts and their preparation, can solve the problems of low activity of Rh-based catalysts, poor ethanol selectivity, and easy deactivation by hydrogenation, so as to improve catalytic activity, catalytic performance, and promote activation Effect

Inactive Publication Date: 2019-10-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to solve the low activity of existing Rh-based catalysts, poor ethanol selectivity, high operating pressure technical problems, provide a Rh-based catalyst loaded on titanium dioxide nanorods and its The preparation method and application overcome the problems of easy deactivation and low activity of noble metal catalytic hydrogenation, thereby improving the yield of ethanol

Method used

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  • Rh-based catalyst loaded on titanium dioxide nanorod as well as preparation method and application thereof
  • Rh-based catalyst loaded on titanium dioxide nanorod as well as preparation method and application thereof
  • Rh-based catalyst loaded on titanium dioxide nanorod as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0053] (1) Take 11.3822g titanium chloride (TiCl 4 ) into 20ml of deionized water, then add 35ml of concentrated nitric acid, heat up to 170 degrees centigrade from room temperature at a rate of 5 degrees centigrade per minute and insulate and react for 20 hours, let it stand for washing, and dry the product after centrifugal washing of the reaction system Dry at 100°C for 12 hours, then raise the temperature from room temperature to 500°C at a rate of 5°C per minute and keep it roasted for 4 hours to obtain supported TiO 2 Nano stave;

[0054] (2) Take 0.0953g iron nitrate (Fe(NO 3 ) 3 9H 2 O) and 0.0163g lithium nitrate (LiNO 3 ), adding RhCl with a concentration of 0.020g / mL 3 1.25mL of aqueous solution to form a metal solution;

[0055] (3) 1g of prepared TiO 2 The nanorods were immersed in the above metal solution, ultrasonicated for 1 hour, dried at room temperature for 12 hours, and dried at 80°C for 12 hours;

[0056] (4) The solid obtained in (3) is heated fro...

Embodiment 2

[0070] React with embodiment 1 method, and its difference is only in the ferric nitrate (Fe(NO) of step (2) 3 ) 3 9H 2 The quality of O) is 0.3812g, and Fe mass percent composition is 5% in the obtained catalyst.

Embodiment 3

[0072] Adopt embodiment 1 method to react, its difference is only in the ferric nitrate (Fe(NO) of step (2) 3 ) 3 9H 2 The quality of O) is 0.1906g, and the Fe mass percentage content is 2.5% in the obtained catalyst.

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Abstract

The invention relates to a Rh-based catalyst loaded on a titanium dioxide nanorod as well as a preparation method and application thereof. The catalyst takes a TiO2 nanorod as a carrier, is loaded with a small amount of active component Rh and takes a small amount of Fe and Li as aids. During preparation of the catalyst, the TiO2 nanorod carrier which is synthesized by a hydrothermal method is immersed in an aqueous solution of rhodium salt, iron salt and lithium salt by a total immersion method, and then a RhFeLi/TiO2NR catalyst is obtained through drying and roasting. The catalyst provided by the invention is suitable for reaction of preparing ethanol through carbon dioxide hydrogenation and takes Rh as the active component; compared with the traditional Rh catalysts, the Rh-based catalyst has the characteristics of high ethanol selectivity and low operation pressure; meanwhile, compared with the commodity TiO2-loaed catalyst, the Rh-based catalyst taking the TiO2 as the carrier greatly improves the catalyst activity and can maintain stable for a long time.

Description

technical field [0001] The present invention relates to a kind of supported catalyst and its preparation method and application, in particular, relates to a TiO 2 Noble metal Rh catalyst with nanorod as carrier, its preparation method and application in carbon dioxide hydrogenation to ethanol. Background technique [0002] The use of fossil fuels has promoted the development of industrialization, but the concentration of carbon dioxide in the atmosphere has reached an unprecedented level; and the global greenhouse effect caused by the massive emission of carbon dioxide has brought serious consequences that cannot be ignored for the earth's environment and human development, such as rising sea levels, Extreme weather, etc. Therefore, the research on the reduction and utilization of carbon dioxide has become a hot spot of worldwide concern and an urgent problem to be solved. The signing of the "Paris Agreement" and the introduction of concepts such as carbon tax and carbon tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/02C07C29/158C07C31/08
CPCB01J23/8946B01J35/006B01J35/0073B01J35/026C07C29/158C07C31/08
Inventor 巩金龙杨成升赵志坚曾亮
Owner TIANJIN UNIV
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