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Technique for preparing synthetic gas from wet carbon dioxide by electrocatalysis

A technology of carbon dioxide and electrocatalysis, applied in the chemical industry, sustainable manufacturing/processing, hydrogen production, etc.

Active Publication Date: 2014-03-05
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there is no report on the method of electrocatalytically producing synthesis gas from wet carbon dioxide based on a microtubular electrocatalytic membrane reactor.

Method used

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  • Technique for preparing synthetic gas from wet carbon dioxide by electrocatalysis
  • Technique for preparing synthetic gas from wet carbon dioxide by electrocatalysis
  • Technique for preparing synthetic gas from wet carbon dioxide by electrocatalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The four-ring hole spinning die adopted in Example 1 has a four-ring hole structure. From the inside to the outside, the diameter of the inner gel bath channel is 2mm, the diameter of the inner layer channel is 3mm, the diameter of the middle layer channel is 4mm, and the diameter of the outer layer channel 5mm;

[0058] like Figure 2-3 As shown, the four-ring hole spinning die for co-spinning includes a bottom cover 13, an upper spacer 11, a middle spacer 15, and a lower spacer 14, wherein an outlet 16 is provided at the bottom of the bottom cover 13, and the bottom cover The inside of 13 is successively the lower spacer 14, the middle spacer 15, and the upper spacer 11; the upper part of the upper spacer 11 is provided with a spacer cover 10, and the spacer cover 10 is provided with an inner material hole 9 connected with the upper spacer 11, The middle layer material hole 19 and the inner gel bath material hole 12 are respectively set on the two side walls of the u...

Embodiment 2

[0081] The structure of the four-ring hole spinning die adopted in embodiment 2 is as in embodiment 1, and the difference is that, from the inside to the outside, the diameter of the inner gel bath channel is 2mm, the diameter of the inner layer channel is 2.8mm, and the diameter of the middle layer channel is 2mm. 3.5mm, the outer channel diameter is 4.2mm;

[0082] The preparation method of the microtubular electrocatalytic membrane reactor of embodiment 2 comprises the following steps:

[0083] (1) Metal-ceramic collector layer ceramic materials, cathode functional layer ceramic materials and dense electrolyte layer ceramic materials:

[0084] Dense electrolyte layer ceramic material: Electrolyte powder is used, which is composed of nano-powder GDC (20-30nm) and micro-powder GDC (1-50μm), and the mass ratio of nano-powder to micro-powder is 8 / 2;

[0085] Cermet current-collecting layer ceramic material: nickel oxide and electrolyte (micron powder GDC1-50μm) are mixed and b...

Embodiment 3

[0099] The structure of the four-ring hole spinning die adopted in Example 3 is as in Example 1.

[0100] The preparation method of the microtubular electrocatalytic membrane reactor of embodiment 3 comprises the following steps:

[0101] (1) Metal-ceramic collector layer ceramic materials, cathode functional layer ceramic materials and dense electrolyte layer ceramic materials:

[0102] Dense electrolyte layer ceramic material: Electrolyte powder is used, which is composed of nano-powder YSZ (20-30nm) and micro-powder YSZ (1-50μm), the mass ratio of nano-powder to micro-powder is 8 / 2;

[0103] Cermet current-collecting layer ceramic material: nickel oxide and electrolyte (micron powder YSZ1-50μm) are mixed and ball milled, and the mass ratio of nickel oxide and electrolyte is 8 / 2;

[0104] Cathode functional layer ceramic material: Nickel oxide and electrolyte (micron powder YSZ1-50μm) are mixed and ball milled, and the mass ratio of nickel oxide and electrolyte is 5 / 5.

[...

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Abstract

The invention relates to a technique for preparing synthetic gas from wet carbon dioxide by electrocatalysis, belonging to the technical field of application of catalytic membrane reactors. According to the method, a microtubule electrocatalytic membrane reactor is connected with an external power supply to form an electrolysis cell, wet CO2 is introduced to the cathode side, and helium gas or any other inert gas is introduced to the anode as purge gas, thereby obtaining oxygen at the anode side and synthetic gas at the cathode side. The microtubule electrocatalytic membrane reactor is prepared by the following steps: preparing the three-layer composite ceramic microtubules by a phase-inversion-improved cospinning-cosintering technique, and impregnatingg an anode outside the sintered three-layer composite ceramic microtubules, wherein in the cospinning process, a four-annular-hole spinneret mold is adopted to perform three-layer coextrusion one-step formation. The microtubule electrocatalytic membrane reactor is applied to the field of electrocatalytic preparation of synthetic gas from wet carbon dioxide; and the membrane reactor adopted by the method has the advantages of high volume power density, small size, high mass transfer and heat transfer efficiency and high mechanical properties, and can implement thermal insulation and sealing more easily.

Description

technical field [0001] The invention relates to a process for preparing synthesis gas by electrocatalysis of wet carbon dioxide, and belongs to the technical field of catalytic membrane reactor application. Background technique [0002] wet CO 2 Electrocatalytic membrane reactors are mainly based on flat solid oxide electrolysis cells. CN201310228980.6 discloses a high-temperature co-electrolysis superlattice composite oxygen electrode and its preparation method. The high-temperature sealing of the composite oxygen electrode is difficult, and it is difficult for the cathode and anode to have good oxidation-reduction resistance, thermal matching, and chemical stability at the same time. Sex, higher mechanical properties and flatness, etc., the research is basically in the stage of thermodynamics and dynamics simulation. [0003] At present, there is no report on the method of electrocatalyzing wet carbon dioxide to produce synthesis gas based on microtubular electrocatalyti...

Claims

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Application Information

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IPC IPC(8): C01B3/02C04B35/622
CPCY02P20/10
Inventor 杨乃涛孟秀霞孟波申义驰谭小耀
Owner SHANDONG UNIV OF TECH
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