Catalyst for catalyzing CO oxidation in smoke of cigarettes as well as preparation method and application of catalyst

A technology for catalyzing flue gas and catalysts, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve the problems of harsh preparation conditions, high cost, and low reserves , to achieve the effects of simple preparation process, improved taste absorption quality, and improved taste absorption quality

Active Publication Date: 2012-07-11
CHINA TOBACCO FUJIAN IND +1
10 Cites 3 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Although a lot of research work has been done on the reduction of CO content in cigarette smoke by catalytic oxidation, the catalytic materials currently used to reduce CO in cigarette smo...
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Abstract

The invention belongs to the field of harm and tar reduction of cigarettes and relates to a catalyst for catalyzing CO oxidation in smoke of the cigarettes as well as a preparation method and an application of the catalyst. The general formula of the catalyst provided by the invention is ZnO-Fe2O3-La2O3-M-Al2O3, wherein the M is one or more metal oxides selected from oxides of Co, Ni, Mn and Mg. According to the invention, the nanometer-composite metal-oxide catalyst prepared by using a reverse-adding coprecipitation method is used in the cigarettes to ensure that the carbon monoxide release amount in the cigarette smoke can be effectively reduced by 5-30%, the harm of smoking to human body is reduced and the safety and the comfortableness of smoking process are increased. The catalyst provided by the invention is simple in preparation process, little in energy consumption and low in cost.

Application Domain

Tobacco treatmentMetal/metal-oxides/metal-hydroxide catalysts

Technology Topic

TarCoprecipitation +7

Examples

  • Experimental program(6)

Example Embodiment

[0015] Example 1
[0016] Measure 400 ml of distilled water into a beaker, and weigh 1.2 g La according to the stoichiometric ratio 2 O 3 Add 3 grams of sodium carbonate precipitant to distilled water, heat up to 40° C. while stirring, and stir for 60 minutes (including the heating process). Measure 22.5 milliliters of zinc nitrate solution (1mol/L), 7.5 milliliters of ferric nitrate solution (1mol/L) and 15 milliliters of manganese nitrate solution (1mol/L) and fully mix them together, after 30 minutes, mix the above three components The mixture was added dropwise to sodium carbonate and La 2 O 3 in the mixed solution. Then add aluminum latex (15 ml of aluminum emulsion prepared from aluminum nitrate), adjust pH=8, and react at 40° C. for 6 hours. Wash with distilled water 5 times. Filtered under reduced pressure, dried at 140 °C for 6 hours, and calcined at 600 °C for 4 hours to obtain ZnO-Fe 2 O 3 -La 2 O 3 -MnO 2 -Al 2 O 3 =3:1:1:2:2 catalyst.

Example

[0017] Examples 2 to 5
[0018] The preparation method is the same as that of Example 1, except that the manganese nitrate is replaced by copper nitrate, nickel nitrate, magnesium nitrate and cobalt nitrate respectively. ZnO-Fe was prepared separately 2 O 3 -La 2 O 3 -CuO-Al 2 O 3 =3:1:1:2:2,
[0019] ZnO-Fe 2 O 3 -La 2 O 3 -NiO-Al 2 O 3 =3:1:1:2:2,
[0020] ZnO-Fe 2 O 3 -La 2 O 3 -MgO-Al 2 O 3 =3:1:1:2:2,
[0021] ZnO-Fe 2 O 3 -La 2 O 3 -CoO 2 -Al 2 O 3 =3:1:1:2:2. catalyst. The above catalyst was added to the cut tobacco, and each cigarette contained 30 mg of the catalyst. The sample cigarettes containing the catalyst were analyzed by a smoking machine to determine the CO content in the cigarette smoke.
[0022] The test results of the embodiment of table 1 in cigarettes
[0023] Sample Example

Example Embodiment

[0024] Example 6
[0025] Measure 400 ml of distilled water into a beaker, and weigh 1.2 g La according to the stoichiometric ratio 2 O 3 Add 3 grams of sodium carbonate precipitant to distilled water, heat up to 40° C. while stirring, and stir for 120 minutes (including the heating process). Measure 22.5 milliliters of zinc nitrate solution (1mol/L), 7.5 milliliters of iron nitrate solution (1mol/L) and 7.5 milliliters of copper nitrate solution (1mol/L), stir well, and mix them evenly. After 30 minutes, the above three The mixture of these components was added dropwise to the sodium carbonate and La 2 O 3 in the mixed solution. Then, aluminum latex (22.5 ml of aluminum latex prepared from aluminum nitrate) was added, pH was adjusted to 9, and the reaction was carried out at 40° C. for 3 hours. Wash with distilled water 5 times. Filtered under reduced pressure, dried at 120 °C for 3 hours, and calcined at 300 °C for 2 hours to obtain ZnO-Fe 2 O 3 -La 2 O 3-CuO-Al 2 O 3 =3:1:1:1:3 catalyst.

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Description & Claims & Application Information

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