# US 10,479,951 B2 · Catalyst for desulfurization, method of preparing the same, and desulfurization method using the same

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- Number: US 10,479,951 B2
- Document ID: US10479951B2
- Status: Granted
- Kind: B2
- Application number: 16/117,619
- Filed: 2018-08-30
- Published: 2019-03-21
- Granted: 2019-11-19
- Earliest claimed: 2017-09-18
- Applicants: Cheol Lee
- Inventors: Cheol Lee
- Web page: https://patentgrep.com/patent/US10479951B2

## CPC

- C10L 9/10: by using additives
- B01J 23/8892: {Manganese}
- B01J 23/8966: {with germanium, tin or lead}
- B01J 27/187: with manganese, technetium or rhenium
- B01J 37/0027: {Powdering}
- B01J 37/031: {Precipitation}
- C10L 10/02: for reducing smoke development
- F23J 7/00: Arrangement of devices for supplying chemicals to fire
- B01J 2523/00: Constitutive chemical elements of heterogeneous catalysts
- C10L 2200/0209: Group I metals: Li, Na, K, Rb, Cs, Fr, Cu, Ag, Au
- C10L 2200/0213: Group II metals: Be, Mg, Ca, Sr, Ba, Ra, Zn, Cd, Hg
- C10L 2200/0218: Group III metals: Sc, Y, Al, Ga, In, Tl
- C10L 2200/0222: Group IV metals: Ti, Zr, Hf, Ge, Sn, Pb
- C10L 2200/0231: Group VI metals: Cr, Mo, W, Po
- C10L 2200/0236: Group VII metals: Mn, To, Re
- C10L 2200/024: Group VIII metals: Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt
- C10L 2200/0268: Phosphor containing compounds
- C10L 2200/0272: Silicon containing compounds
- C10L 2200/029: Salts, such as carbonates, oxides, hydroxides, percompounds, e.g. peroxides, perborates, nitrates, nitrites, sulfates, and silicates
- C10L 2230/04: Catalyst added to fuel stream to improve a reaction
- C10L 2290/24: Mixing, stirring of fuel components
- C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- F23J: REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES (combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G7/06)

## Abstract

Disclosed is a catalyst for desulfurization, including (a) an oxide selected from among SiO2, Al2O3, Fe2O3, TiO2, MgO, MnO, CaO, Na2O, K2O and P2O3, (b) a metal selected from among Li, Cr, Co, Ni, Cu, Zn, Ga, Sr, Cd and Pb, and (c) a liquid compound selected from among sodium tetraborate (Na2B4O7.10H2O), sodium hydroxide (NaOH), sodium silicate (Na2SiO3) and hydrogen peroxide (H2O2). The catalyst of the invention has a 2:1 type layered structure in which one octahedral layer is interposed between two tetrahedral layers and which has a net negative charge due to occupation of only two of three positively charged sites in the octahedral layer, and the catalyst for desulfurization is provided in the form of a metal chelate compound through chelation with a metal ion, whereby sulfur oxide (SOx) can be adsorbed and removed at high efficiency upon combustion of a combustible substance.

## Claims

### Claim 1

A catalyst for desulfurization, comprising:
(a) an oxide selected from the group consisting of SiO2, Al2O3, Fe2O3, TiO2, MgO, MnO, CaO, Na2O, K2O and P2O3;
(b) a metal selected from the group consisting of Li, Cr, Co, Ni, Cu, Zn, Ga, Sr, Cd and Pb; and
(c) a liquid compound selected from the group consisting of sodium tetraborate (Na2B4O7.10H2O), sodium hydroxide (NaOH), sodium silicate (Na2SiO3) and hydrogen peroxide (H2O2),
wherein the oxide, the metal and the liquid compound are formed into a metal chelate compound.

### Claim 2 (depends on 1)

The catalyst for desulfurization of claim 1, wherein the oxide includes 15 to 90 parts by weight of SiO2, 15 to 100 parts by weight of Al2O3, 10 to 50 parts by weight of Fe2O3, 5 to 15 parts by weight of TiO2, 20 to 150 parts by weight of MgO, 10 to 20 parts by weight of MnO, 20 to 200 parts by weight of CaO, 15 to 45 parts by weight of Na2O, 20 to 50 parts by weight of K2O or 5 to 20 parts by weight of P2O3, and
the metal includes 0.0035 to 0.009 parts by weight of Li, 0.005 to 0.01 parts by weight of Cr, 0.001 to 0.005 parts by weight of Co, 0.006 to 0.015 parts by weight of Ni, 0.018 to 0.03 parts by weight of Cu, 0.035 to 0.05 parts by weight of Zn, 0.04 to 0.08 parts by weight of Ga, 0.02 to 0.05 parts by weight of Sr, 0.002 to 0.01 parts by weight of Cd or 0.003 to 0.005 parts by weight of Pb.

### Claim 3 (depends on 1)

The catalyst for desulfurization of claim 1, wherein the oxide and the metal have a particle size of 1 to 2 μm and a specific gravity of 2.5 to 3.0.

### Claim 4 (depends on 1)

The catalyst for desulfurization of claim 1, wherein the liquid compound includes 20 to 130 parts by weight of sodium tetraborate (Na2B4O7.10H2O), 15 to 120 parts by weight of sodium hydroxide (NaOH), 50 to 250 parts by weight of sodium silicate (Na2SiO3) or 10 to 50 parts by weight of hydrogen peroxide (H2O2).

### Claim 5 (depends on 1)

The catalyst for desulfurization of claim 1, wherein the catalyst for desulfurization activates an adsorption effect of sulfur oxide (SOx) at 600 to 900° C.

### Claim 6

A method of preparing a catalyst for desulfurization, comprising:
(a) mixing and pulverizing an oxide powder selected from the group consisting of SiO2, Al2O3, Fe2O3, TiO2, MgO, MnO, CaO, Na2O, K2O and P2O3;
(b) mixing and pulverizing a metal powder selected from the group consisting of Li, Cr, Co, Ni, Cu, Zn, Ga, Sr, Cd and Pb; and
(c) mixing the oxide powder of step (a) and the metal powder of step (b) with a liquid compound selected from the group consisting of sodium tetraborate (Na2B4O7.10H2O), sodium hydroxide (NaOH), sodium silicate (Na2SiO3) and hydrogen peroxide (H2O2) to yield a catalyst for desulfurization, wherein the oxide powder, the metal powder and the liquid compound are formed into a metal chelate compound.

### Claim 7 (depends on 6)

The method of claim 6, wherein the oxide powder in step (a) includes 15 to 90 parts by weight of SiO2, 15 to 100 parts by weight of Al2O3, 10 to 50 parts by weight of Fe2O3, 5 to 15 parts by weight of TiO2, 20 to 150 parts by weight of MgO, 10 to 20 parts by weight of MnO, 20 to 200 parts by weight of CaO, 15 to 45 parts by weight of Na2O, 20 to 50 parts by weight of K2O or 5 to 20 parts by weight of P2O3.

### Claim 8 (depends on 6)

The method of claim 6, wherein the metal powder in step (b) includes 0.0035 to 0.009 parts by weight of Li, 0.005 to 0.01 parts by weight of Cr, 0.001 to 0.005 parts by weight of Co, 0.006 to 0.015 parts by weight of Ni, 0.018 to 0.03 parts by weight of Cu, 0.035 to 0.05 parts by weight of Zn, 0.04 to 0.08 parts by weight of Ga, 0.02 to 0.05 parts by weight of Sr, 0.002 to 0.01 parts by weight of Cd or 0.003 to 0.005 parts by weight of Pb.

### Claim 9 (depends on 6)

The method of claim 6, wherein the oxide powder in step (a) and the metal powder in step (b) are pulverized to a particle size of 1 to 2 μm.

### Claim 10 (depends on 6)

The method of claim 6, wherein the liquid compound in step (c) includes 20 to 130 parts by weight of sodium tetraborate (Na2B4O7.10H2O), 15 to 120 parts by weight of sodium hydroxide (NaOH), 50 to 250 parts by weight of sodium silicate (Na2SiO3) or 10 to 50 parts by weight of hydrogen peroxide (H2O2).

### Claim 11 (depends on 6)

The method of claim 6, wherein the catalyst for desulfurization formed in step (c) is used in a form of a powder catalyst for desulfurization obtained by subjecting the catalyst for desulfurization to precipitation, separation and drying; and a liquid catalyst for desulfurization, which remains after separation of the precipitated catalyst for desulfurization.

### Claim 12 (depends on 1)

A desulfurization method wherein the catalyst for desulfurization of claim 1, comprising adsorbing and removing sulfur oxide by mixing the catalyst for desulfurization with a combustible substance and combusting the combustible substance.

### Claim 13 (depends on 12)

The desulfurization method of claim 12, wherein an amount of the catalyst for desulfurization that is mixed is adjusted depending on amounts of C, H, N and S in the combustible substance.