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Metal carbide nanomaterial catalyst and method for preparing same

A metal nano-cluster and catalyst technology, which is applied in the field of metal carbide nano-material catalyst and its preparation, can solve the problem that the catalyst formula and activity are not equal, and achieve the effect of improving the service life

Active Publication Date: 2020-08-11
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the problem with current commercial palladium-based catalysts is the generation of large amounts of saturates and green oils (C4+ oligomer compounds) by-products due to the overhydrogenation of alkenes and / or alkynes and / or Oligomerization of olefins and / or olefins
In other words, all the early studies of this class of catalysts failed to provide complete information on the catalyst formulation and active phase of Pt / ZSM-5-based catalysts in ethane aromatization.

Method used

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  • Metal carbide nanomaterial catalyst and method for preparing same
  • Metal carbide nanomaterial catalyst and method for preparing same
  • Metal carbide nanomaterial catalyst and method for preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0057] 5 g of ZSM-5 powder (with a silicon to aluminum ratio of 30) was mixed with an amount of Pt(NO3)2 in solution. The mixture was stirred at room temperature for 1 hour, then heated to 80 °C in a rotary evaporator to obtain a dry product, followed by air calcination at 550 °C for 4 hours. The powder was then reduced in situ in hydrogen at 630°C for 1 hour and cooled to room temperature (eg, between 20-25°C) in a hydrogen atmosphere. The powder was then pressed and sieved to 20x40 mesh. The resulting product is denoted Catalyst B and contains 500 ppm Pt. Characterization measurements were then performed on Catalyst B to determine its characteristics.

Embodiment 2

[0059] The powder was prepared using the same procedure as Catalyst B in Example 1, but after reduction in a hydrogen atmosphere, the powder was cooled to 400°C in a hydrogen atmosphere, followed by an inert gas purge at 400°C for 10 minutes, and then at 300-500°C Activated in ethane (50% nitrogen balance) at a temperature of . After ethane activation, the powder is cooled to 100° C. under a stream of ethane and further cooled to room temperature in an inert gas atmosphere, such as nitrogen. The resulting product, denoted Catalyst C, also contained 500 ppm Pt.

[0060] Catalysts A, B, and C were then characterized by testing and analyzing the platinum dispersion of the catalysts in the catalysts by dynamic CO chemisorption measurements (chemisorption), where diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS, diffuse reflectance infrared Fourier transform spectroscopy) and X-ray absorption near edge structure (XANES, X-ray absorption near edge structure) to stu...

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Abstract

A catalyst that includes heterogeneous metal carbide nanomaterials and a novel preparation method to synthesize the metal carbide nanomaterials under relatively mild conditions to form an encapsulatedtransition metal and / or transition metal carbide nanoclusters in a support and / or binder. The catalyst may include confined platinum carbide nanoclusters. The preparation may include the treatment ofencapsulated platinum nanoclusters with ethane at elevated temperatures. The catalysts may be used for catalytic hydrocarbon conversions, which include but are not limited to, ethane aromatization, and for selective hydrogenation, with negligible green oil production.

Description

[0001] Cross References to Related Applications [0002] This application is dependent upon U.S. Provisional Application No. 62 / 800,662, filed February 4, 2019, entitled "Metal Carbide Nanomaterials and Methods of Preparation and Catalytic Applications," and Application No. 16 / 744,383, filed January 16, 2020 The benefit of the US application entitled "Metal Carbide Nanomaterial Catalysts and Methods of Making Same" filed on 11 July 2009, which is incorporated herein by reference. technical field [0003] The present invention relates to hydrocarbon conversion catalysts and methods for their production, and more particularly to the synthesis of novel nanomaterial catalysts comprising encapsulated metal carbide nanoclusters, wherein the metal carbide nanoclusters are in Prepared by treating confined metal nanoclusters with hydrocarbons under relatively mild conditions, such as temperatures of 100-700°C and atmospheric conditions. [0004] The present invention also relates to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/44B01J35/00C07C2/76C07C5/05C07C5/09C07C15/02C07C11/04C07C11/08
CPCB01J35/0066B01J35/006B01J29/44C07C2/76C07C5/09C07C5/05B01J2229/186B01J2229/34C07C2529/44C07C15/02C07C11/04C07C11/08C07C2529/40B01J35/002B01J35/0013B01J35/0073B01J23/42Y02P20/52C07C15/04C07C15/06C07C15/08B01J27/22B01J29/40B01J35/0086B01J35/10B01J35/023B01J35/008B01J6/001B01J37/0009B01J37/04B01J37/16
Inventor 单军军王辉丽萨·阮约书亚·迈尔斯程继红
Owner CHNA ENERGY INVESTMENT CORP LTD
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