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proton conducting membrane

A proton-conducting membrane and material technology, which is used in the conversion of alkanes to alkenes, and the application of composite metal oxides in the preparation of proton-conducting membranes, which can solve problems such as moving too fast.

Active Publication Date: 2016-12-07
普罗迪亚股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Also, the inventors realized that tungstate forms an ideal membrane because it provides just the right hydrogen selectivity for the dehydrogenation of alkanes to olefins, or more commonly to alkenes / aromatics, if allowed Too much hydrogen passes through the membrane, causing the equilibrium of the reaction to shift backwards too quickly, and thus the formation of carbon

Method used

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Examples

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Embodiment 1

[0231] Oxide powder is prepared by freeze-dried precursor method (Magraso et al. Dalton Transactions, 2009, 10273-10283), and La 2 o 3 and WO 3 Soluble in dilute nitric acid and hydroxide solutions respectively, WO 3 Soluble in aqueous lye to form tungstate ion [WO 4 ] 2+ .

[0232] The ethylenediaminetetraacetic acid was added to each solution as a dispersant, the molar ratio to the ligand metal was 1:1, and the pH value was adjusted to 7~8. After neutralization, the two cation solutions mixed without visible precipitation. Droplets of the clear solution were then flash frozen in liquid nitrogen and lyophilized for 3 days. In this way, the amorphous precursor is prepared, immediately fired at 300°C for 15 minutes to prevent hydration, and then the particles are calcined at 600°C for 2~4 hours until a white powder is formed to ensure that the organic matter in the precursor is completely decomposed . Next, the powder is calcined at 1100~1500°C for 2 hours, and the char...

Embodiment 2

[0235] Press the powder prepared by calcination at 100Mpa and 1000°C with a rated La / W ratio of 5.6 according to the method in Example 1 to prepare a pressed tablet with a diameter of 10mm and a thickness of 1mm; in air, the sample was sintered at 1500°C.

[0236] figure 2 The SEM micrograph of the sample is given, and the particle size is about 10 μm.

Embodiment 3

[0238] The tungstate of the present invention is coated on an alumina carrier by dip coating, and the carrier is dipped in a La and W caprylate solution, and isopropanol and diethanolamine are used in the solution, and drying is performed between each dipping. The membrane is then heat-treated at 800°C, so the catalyst adheres to the membrane surface.

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Abstract

Accordingly, a first aspect of the present invention is to provide a reactor comprising a first zone containing a dehydrogenation catalyst, a second zone separated from the first zone by a proton-conducting membrane containing the formula (I) LnaWbO12-y Shown composite metal oxide; Wherein, Ln is Y, or a kind of in No. 57~71 elements; Molar ratio a:b is 4.8~6, is preferably 5.3~6; Y is to make molecular formula (I) uncharged Number, such as y satisfying 0≤y≤1.8.

Description

technical field [0001] The present invention relates to a proton conducting membrane which can be used to enable dehydrogenation reactions, especially the conversion of alkanes to alkenes. In particular, the present invention relates to the application of a composite metal oxide in the preparation of a proton-conducting membrane. Background technique [0002] With the depletion of global liquid petroleum reserves, natural gas mainly containing methane is considered an important energy source for the production of liquid fuels, but light alkanes such as methane and ethane are directly dehydrogenated into more valuable petrochemical products , such as alkenes and aromatics (hereinafter referred to as alkenes / aromatics), remains a challenge. [0003] Commercial processes from ethane to olefin / aromatic products include steam cracking and catalytic dehydrogenation, and more recently there has been renewed interest in oxidative dehydrogenation. [0004] Oxidative dehydrogenation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90C01B3/26C07C2/76C07C5/32C07C5/333
CPCC01B2203/0405C01B2203/1047C01B2203/1058C01B2203/1064C01B2203/107C07C2/76C07C5/322C07C5/333C07C2521/04C07C2523/22C07C2523/26C07C2523/28C07C2523/42C07C2523/44C07C2523/50C07C2523/745C07C2523/755C07C2529/24C07C2529/48C07C2529/70C07C2529/85C01B3/26Y10T428/24997Y02E60/50C07C11/04C07C11/24C07C15/04H01M4/9033
Inventor 克里斯蒂安·舍尔塞斯培·克里斯蒂安·韦斯特尔
Owner 普罗迪亚股份有限公司
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