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A kind of iron series element microporous molecular sieve and its preparation method and application

A microporous molecular sieve, iron-based element technology, applied in chemical instruments and methods, water/sewage treatment equipment, biological water/sewage treatment, etc., can solve the problems of waste liquid polluting the environment, long synthesis time, small specific surface area, etc. Achieve the effect of low price, saving money, and low hydrogen evolution overpotential

Inactive Publication Date: 2019-04-26
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the technical problems of the existing microporous molecular sieves and preparation methods of iron series elements, such as long synthesis time and environmental pollution by waste liquid, and the costly and relatively expensive cathode materials of microbial electrolytic cells for synchronously producing hydrogen from coking wastewater. To solve technical problems such as small surface area, provide a microporous molecular sieve of iron series elements and its preparation method and application

Method used

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  • A kind of iron series element microporous molecular sieve and its preparation method and application
  • A kind of iron series element microporous molecular sieve and its preparation method and application
  • A kind of iron series element microporous molecular sieve and its preparation method and application

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Embodiment 1

[0044] A microporous molecular sieve of iron series elements in this embodiment is a microporous molecular sieve containing nickel, and its chemical molecular formula is:

[0045] Na 67.56 [Ni 14.64 Al 38.32 Si 139.05 o 384 ]·264H 2 O,

[0046] 1. Synthesis of nickel-containing microporous molecular sieves

[0047] The preparation method of the above-mentioned nickel-containing microporous molecular sieve comprises the following steps:

[0048] 1) Synthesis of directing agent

[0049] ① Preparation of directing agent gel

[0050] Take deionized water, sodium hydroxide, sodium metaaluminate, and 30% silica sol in a molar ratio of 129:10.16:1:5.86;

[0051] Add deionized water, sodium hydroxide and sodium metaaluminate to the polytetrafluoroethylene reaction vessel in sequence, then add the silica sol drop by drop at a speed of 2 drops / second, and stir at a constant speed on the stirrer to fully mix the raw materials. After stirring for 30min, the mixture in the polyte...

Embodiment 2

[0088] A microporous molecular sieve of iron series elements in this embodiment is a microporous molecular sieve containing cobalt, and its chemical molecular formula is:

[0089] Na 67.56 [Co 14.64 al 38.32 Si 139.05 o 384 ]·264H 2 O,

[0090] 1. Synthesis of cobalt-containing microporous molecular sieves

[0091] The preparation method of the above-mentioned cobalt-containing microporous molecular sieve comprises the following steps:

[0092] 1) Synthesis of directing agent

[0093] ① Preparation of directing agent gel

[0094] Take deionized water, sodium hydroxide, sodium metaaluminate, and 30% silica sol in a molar ratio of 129:10.16:1:5.86;

[0095] Add deionized water, sodium hydroxide and sodium metaaluminate to the polytetrafluoroethylene reactor in turn, then add the silica sol drop by drop at a speed of 2 drops / second, and stir at a constant speed on the stirrer to fully mix the raw materials. After stirring for 30min, the mixture in the polytetrafluoroeth...

Embodiment 3

[0124] A microporous molecular sieve of iron series elements in this embodiment is a microporous molecular sieve containing nickel, and its chemical molecular formula is:

[0125] Na 67.56 [Ni 14.64 al 38.32 Si 139.05 o 384 ]·264H 2 O,

[0126] 1. Synthesis of nickel-containing microporous molecular sieves

[0127] The preparation method of the above-mentioned nickel-containing microporous molecular sieve comprises the following steps:

[0128] 1) Synthesis of directing agent

[0129]① Preparation of directing agent gel

[0130] Take deionized water, sodium hydroxide, sodium metaaluminate, and 30% silica sol in a molar ratio of 129:10.16:1:5.86;

[0131] Add deionized water, sodium hydroxide and sodium metaaluminate to the polytetrafluoroethylene reactor in turn, then add the silica sol drop by drop at a speed of 2 drops / second, and stir at a constant speed on the stirrer to fully mix the raw materials. After stirring for 30min, the mixture in the polytetrafluoroethy...

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Abstract

The invention relates to a preparation method of an iron series element micro-porous molecular sieve. The preparation method is characterized in that under the situations of water environment pollution and energy shortage, a silica sol, sodium metaaluminate, sodium hydroxide and nitrate corresponding to an iron series element are taken as raw materials; by adopting a directing agent method, the iron series element micro-porous molecular sieve is finally synthesized through heating in a thermostatic chamber, crystallizing, quenching, performing suction filtration, drying and roasting. The crystal grain diameter of the synthesized iron series element micro-porous molecular sieve is 1-2 mu m, and the product purity reaches 96 percent; after the iron series element micro-porous molecular sieve is used in a microbial electrolysis cell to treat a cathodic hydrogen evolution catalytic material containing coking wastewater, results show that under the same condition, the gas production rate of the cobalt-containing micro-porous molecular sieve is 80.88 percent of that of a micro-porous molecular sieve adopting a Pt electrode, and the gas production rate of the nickel-containing micro-porous molecular sieve is improved by 48.53 percent compared with that of the micro-porous molecular sieve adopting the Pt electrode.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a microporous molecular sieve of iron series elements, a preparation method and application thereof. Background technique [0002] In recent years, energy shortage has become a major problem faced by people. Microbial electrolysis cell (MEC) uses microorganisms to decompose organic matter in sewage and precipitate hydrogen at the cathode, which not only solves the problem of water environmental pollution to a certain extent, but also provides a new direction for solving energy problems. [0003] In order to improve the efficiency of hydrogen production, the hotspots of MEC research mainly focus on the selection and optimization of cathode materials. Traditional cathode materials include Pt cathode catalysts, stainless steel cathodes, biological cathode materials, nickel metal cathode catalysts, and nanoscale cathode catalysts. [0004] Pt electrodes are wid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/06C25B1/04C25B11/06C02F3/00
CPCC01B39/06C01P2002/72C01P2004/03C01P2004/32C01P2004/41C01P2004/61C01P2006/60C01P2006/80C02F3/005C02F2201/46105C25B1/04C25B11/057Y02E60/36
Inventor 赵煜胡丽杨冬花王杰马存存王改薄琼
Owner TAIYUAN UNIV OF TECH
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