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Reducing carbon dioxide to products

A carbon dioxide and product technology, applied in non-precious metal oxide coating, reduction electrolysis, electrolytic organic production, etc., can solve problems such as low reaction rate

Inactive Publication Date: 2013-06-05
AVANTIUM KNOWLEDGE CENT BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many conventional CO2 reduction technologies have low reaction rates, for example, some commercial systems have current densities in excess of 100mA / cm2 2 , while in the laboratory the reaction rate reduces to

Method used

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Examples

Experimental program
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Effect test

example 1

[0063] Example 1: General Electrochemical Methods

[0064] Chemicals and materials, the chemical substances used are all obtained directly from the supplier, the purity of the chemical substances is greater than 98%, no further purification is required, and the electrolyte aqueous solution is prepared using deionized water or high-purity water.

[0065] electrochemical system. The electrochemical system is a standard two-chamber electrolyzer 102 separated into an anode 118 and a cathode 120 within the cell separated by a porous glass or other ion-conducting bridge 116. The electrolyte 122 has a concentration range of 0.1 molar to 1 mole, the most typical concentration is 0.5 mole, the use range of catalyst concentration is 0.1 millimolar to 1 mole, select specific electrolyte 122 and specific catalyst 124 according to different products.

[0066] like Figure 7 Shown is an electrochemical flow chart of the method. The method (or process) 140 generally includes steps 142 , 14...

example 2

[0069] Example 2: General photoelectrochemical method

[0070] Chemicals and materials, use higher analytical grade chemicals, use deionized or high-purity water to prepare aqueous electrolyte solutions.

[0071] photochemical system. The photochemical system is composed of a three-necked flask containing 0.5 mmol potassium chloride as electrolyte and 1 mmol to 1 mole catalyst (for example, 10 mmol pyridine or pyridine derivatives), the cathode is a single crystal P-type semiconductor, before operation Concentrated nitric acid:concentrated hydrochloric acid = 2:1 Etching in bath for about 1 to 2 minutes, crystal soldered with indium-zinc (2% zinc by weight), conductive silver epoxy (epoxy technology) contacts to connect external leads, photography Cover the glass tube with insulating epoxy cement. Only the front side of the semiconductor is exposed in the aqueous solution. All potential values ​​are measured by saturated calomel electrodes. The three electrode assemblies are ...

example 3

[0077] Example 3: Analysis of electrolysis products

[0078] Electrochemical experiments usually use a CH potentiostat or DC power supply with a current logger for electrolysis experiments, and the CH instrument potentiostat runs for 6 to 30 hours at the electrolytic potential of cyclic voltammetry until it reaches the threshold of each run. amount of charge.

[0079] Gas chromatography, a gas chromatograph (HP 5890 gas chromatograph) equipped with a Midland detector was used to electrolyze the sample, and the removal of salt in the electrolyte was achieved by ion exchange resin (firstly, the polymer was stirred in an aqueous solution with a volume fraction of 0.1%) Ethylene glycol octyl phenyl ether, before cleaning, make sure there are no organic products, and then rinse with plenty of water), dry and inject the sample into the gas chromatograph at a temperature of 60 degrees, 1 gram of resin can be used to remove For a sample of about 1ml of salt, the temperature of the in...

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Abstract

A method for reducing carbon dioxide to one or more products is disclosed. The method may include steps (A) to (C). Step (A) may bubble the carbon dioxide into a solution of an electrolyte and a catalyst in a divided electrochemical cell. The divided electrochemical cell may include an anode in a first cell compartment and a cathode in a second cell compartment. The cathode generally reduces the carbon dioxide into the products. Step {B} may vary at least one of (i) which of the products is produced and (ii) a faradaic yield of the products by adjusting one or more of (a) a cathode material and (b) a surface morphology of the cathode. Step (C) may separate the products from the solution.

Description

technical field [0001] The present invention relates generally to chemical reduction, and more particularly to a method and / or apparatus for effecting the reduction of carbon dioxide to various products. Background technique [0002] The combustion of fossil fuels produces billions of tons of carbon dioxide emissions in everyday activities such as electricity, transportation and manufacturing. Research since the 1970s has shown that the concentration of carbon dioxide in the atmosphere will alter the Earth's climate, altering the pH of the oceans and other potentially damaging effects. Countries around the world, including the United States, are looking for ways to reduce carbon emissions. [0003] Carbon dioxide is reduced by converting it into economically valuable materials such as fuels and chemical feedstocks. If carbon dioxide conversion uses energy from renewable sources, it would be possible to achieve commercial value, both in mitigating carbon dioxide emissions a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/04C25B1/00C25B3/25
CPCC25B3/04C25B1/003C25B1/55C25B3/25C25B1/23C25B11/046C25B9/19
Inventor 埃米莉·巴顿·科尔纳拉扬纳帕·西华拉沙安德鲁·B·卡斯利凯尔·剔梅勒提·克利须那
Owner AVANTIUM KNOWLEDGE CENT BV
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