# US 2021/0275983 A1 · Dielectric packing material for conversion of carbon dioxide to valuable materials by non-thermal plasma technology

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- Number: US 2021/0275983 A1
- Document ID: US20210275983A1
- Status: Published application
- Kind: A1
- Application number: 17/190,473
- Filed: 2021-03-03
- Published: 2021-09-09
- Earliest claimed: 2020-03-03
- Inventors: Kyu Bum Han
- Web page: https://patentgrep.com/patent/US20210275983A1

## CPC

- B01J 15/005: {in the presence of catalytically active bodies, e.g. porous plates}
- B01J 19/088: {giving rise to electric discharges (for heating purposes H05B7/00; for the production of ozone C01B13/11, H01T19/00)}
- B01J 23/02: of the alkali- or alkaline earth metals or beryllium
- B01J 23/52: Gold
- B01J 23/60: with zinc, cadmium or mercury
- B01J 23/62: with gallium, indium, thallium, germanium, tin or lead
- C07C 27/06: by hydrogenation of oxides of carbon
- C07C 29/15: by reduction of oxides of carbon exclusively
- H05H 1/2406: {using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes}
- H05H 1/2431: {using cylindrical electrodes, e.g. rotary drums}
- H05H 1/2441: {characterised by the physical-chemical properties of the dielectric, e.g. porous dielectric}
- B01J 2219/0871: Heating or cooling of the reactor
- B01J 2219/0892: involving catalytically active material
- B01J 2219/0896: Cold plasma
- C04B 2111/0081: {as catalysts or catalyst carriers}
- C04B 2235/5427: millimeter or submillimeter sized, i.e. larger than 0,1 mm
- Y02P 20/52: using catalysts, e.g. selective catalysts
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- H05H: PLASMA TECHNIQUE (apparatus or processes specially adapted for producing X-rays H05G2/00); PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present invention relates to a dielectric packing material for converting carbon dioxide to a valuable material using non-thermal plasma technology, and more particularly, to a dielectric packing material for converting carbon dioxide to a valuable material using non-thermal plasma technology, wherein the dielectric packing material is packed in a non-thermal plasma reactor for conversion of carbon dioxide to a valuable material and is formed to have a hollow structure with multiple edges on the surface thereof to effectively scatter non-thermal plasma at the edges and thereby to improve CO2 conversion and energy efficiency.

## Claims

### Claim 1

A dielectric packing material for converting carbon dioxide to valuable materials by scattering non-thermal plasma, having a hollow cylindrical structure and multiple grooves on a surface thereof.

### Claim 2 (depends on 1)

The dielectric packing material of claim 1, wherein the dielectric packing material is at least one selected from the group consisting of Al2O3, ZrO2, CaO, MgO, zeolite, quartz sand and glass beads.

### Claim 3 (depends on 1)

The dielectric packing material of claim 1, wherein the dielectric packing material has a particle size of 180 μm to 300 μm.

### Claim 4 (depends on 1)

A catalyst composite for converting carbon dioxide to valuable materials by scattering non-thermal plasma, the catalyst composite having a structure in which a surface of the dielectric packing material of claim 1 is coated with a catalyst.

### Claim 5 (depends on 4)

The catalyst composite of claim 4, wherein the catalyst is selected from the group consisting of Cu, Pt, Pd, Au, In2O3, ZnO, BaTiO3 and/or TiO2.

### Claim 6 (depends on 1)

A method of producing a dielectric packing material for converting carbon dioxide to valuable materials by scattering non-thermal plasma of claim 1, the method comprising performing a reduction reaction by sintering a dielectric packing material at a temperature of 1,000° C. to 1,200° C. and an oxygen partial pressure (PO2) of 10−8 to 10−6 atm.

### Claim 7 (depends on 1)

A method of preparing a catalyst composite for converting carbon dioxide to valuable materials by scattering non-thermal plasma, the method comprising coating a surface of the dielectric packing material of claim 1 with a catalyst.

### Claim 8 (depends on 7)

The method of preparing the catalyst composite of claim 7, wherein the coating is dip coating or plasma spray coating.

### Claim 9 (depends on 1)

A device of preparing valuable materials from carbon dioxide using a dielectric barrier discharge, the device comprising:
a reactor body;
an internal electrode and an external electrode provided in the reactor;
an inlet tube for supplying reactants into the reactor;
a power supply for supplying current to the internal electrode and the external electrode to generate plasma; and
a ground portion of the current connected to the external electrode,
wherein the reactor body is packed with the dielectric packing material of claim 1 or a catalyst composite comprising said dielectric packing material in which a surface of the dielectric packing material is coated with a catalyst.

### Claim 10 (depends on 9)

The device of preparing valuable materials from carbon dioxide of claim 9, further comprising a heater for heating the reactor,
wherein a temperature of the heater is maintained at 30° C. to 100° C.

### Claim 11 (depends on 1)

A method of preparing valuable materials from carbon dioxide, the method comprising:
(a) packing a reactor body with the dielectric packing material of claim 1 or a catalyst composite comprising said dielectric packing material in which a surface of the dielectric packing material is coated with a catalyst, and supplying a carbon-dioxide-containing gas mixture thereto;
(b) heating supplied gas mixture; and
(c) preparing valuable materials by applying a high voltage to an internal electrode and an external electrode provided in the reactor.

### Claim 12 (depends on 11)

The method of preparing valuable materials from carbon dioxide of claim 11, wherein the heating in step (b) is performed at 100° C. or lower under atmospheric pressure.

### Claim 13 (depends on 11)

The method of preparing valuable materials from carbon dioxide of claim 11, wherein the high voltage in step (c) is 5 kV to 15 kV.

### Claim 14 (depends on 11)

The method of preparing valuable materials from carbon dioxide of claim 11, wherein the valuable material is methanol.