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Preparation method of oxygen carrier for producing propylene through propane chemical-looping dehydrogenation

A chemical chain, oxygen carrier technology, applied in chemical instruments and methods, organic chemistry, metal/metal oxide/metal hydroxide catalysts, etc. High temperature carbon deposition inactivation and other problems, to achieve the effect of high dehydrogenation activity, increased wear resistance, and high propylene selectivity

Active Publication Date: 2019-03-19
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned patents all use the impregnation method to load the Pt-Sn catalyst on the carrier, the catalyst is prone to high-temperature carbon deposition and deactivation, the catalyst recycling rate is low during the reaction process, and the reactivity of the catalyst after circulation is also low

Method used

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  • Preparation method of oxygen carrier for producing propylene through propane chemical-looping dehydrogenation
  • Preparation method of oxygen carrier for producing propylene through propane chemical-looping dehydrogenation
  • Preparation method of oxygen carrier for producing propylene through propane chemical-looping dehydrogenation

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Embodiment 1

[0029] The specific process of preparing the manganese-based oxygen carrier with core-shell structure in this embodiment is as follows:

[0030] (1) Preparation of alumina carrier: screen 500g of alumina particles with a particle size of 100-500 μm, add 3-5g of scallop powder, mix well, add 100ml of 2% nitric acid aqueous solution dropwise, and place in a 100°C refrigerator after fully mixing After drying in an oven for 48 hours, calcining in a muffle furnace at 500-600°C to obtain alumina carrier particles;

[0031] (2) Preparation of manganese-containing alumina carrier: get 200 g of alumina carrier particles obtained in step (1), immerse in 500 ml of manganese nitrate deionized aqueous solution with a mass fraction of 50%, obtain the impregnated carrier after 24 hours of immersion, and then drying the impregnated particles at 90-120°C for 48 hours, and calcining at 650°C for 3-5 hours to obtain the manganese-containing alumina carrier;

[0032] (3) Preparation of manganese...

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Abstract

The invention belongs to the technical field of preparation of oxygen carriers, and relates to a preparation method of an oxygen carrier for producing propylene through propane chemical-looping dehydrogenation. The preparation method includes dipping aluminium oxide into precursor aqueous solution containing manganese to obtain an aluminum oxide oxygen carrier, loading a certain quantity of manganese-base active component, adding in clay and a binder into the oxygen carrier to improve wear resistance of the oxygen carrier, further, loading lithium oxide active component to the carrier so as toobtain oxygen carrier particles for producing propylene through propane chemical-looping dehydrogenation. The preparation method is simple in process; the oxygen carrier cannot cause environmental pollution in preparation and recycling process; the prepared oxygen carrier has high dehydrogenation activity, high propane conversion rate and high prpylene selectivity.

Description

Technical field: [0001] The invention belongs to the technical field of oxygen carrier preparation, and relates to a method for preparing an oxygen carrier for propane chemical chain dehydrogenation to produce propylene. Background technique: [0002] At present, most of the low-carbon alkanes produced in China are directly used as fuel, and their utilization value needs to be improved, especially the supply of propylene is in short supply. Therefore, research on the dehydrogenation of low-carbon alkanes to olefins can realize the rational utilization of natural gas. In 2015, the domestic demand for propylene is expected to be more than 30.14 million tons, while the annual domestic propylene output in 2015 was only 22.45 million tons, which is far below the demand. In order to meet the huge demand for propylene, new propane production has been widely carried out Technology research and development work. The propane dehydrogenation processes that have been industrialized no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34C07C5/48C07C11/06
CPCC07C5/48B01J23/34C07C2523/34B01J35/397C07C11/06Y02P20/52
Inventor 郭庆杰左成吴曼张秀丽
Owner QINGDAO UNIV OF SCI & TECH
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