A method for preparing a catalyst that reduces harmful components in flue gas, its product and application.

Abstract

The present invention provides a preparation method of a catalyst having the effect of reducing harmful components in flue gas, and its product and application. The method comprises: (1) mixing NaOH solution with fly ash to obtain a suspension; (2) mixing metal oxide and kaolin and grinding to obtain a composite material; (3) adding the suspension of step (1) to the composite material of step (2) and continuing to grind to obtain a grinded product; (4) performing solid-liquid separation on the grinded product of step (3), then collecting the solid material, and drying the solid material to obtain the catalyst having the effect of reducing harmful components in flue gas. The catalyst having the effect of reducing harmful components in flue gas obtained by the preparation method provided by the present invention can selectively catalyze harmful components in flue gas, and effectively reduce other harmful components without changing the nicotine content in mainstream flue gas.

Description

Technical Field

[0001] The present invention belongs to the technical field of cigarettes, and in particular relates to a preparation method of a catalyst having the effect of reducing harmful components in smoke, a product thereof and an application thereof, and a product thereof and an application thereof. Background Art

[0002] With the development of the times, people pay more and more attention to health, so the cigarette industry has gradually begun to develop products that do not reduce the taste and have fewer harmful ingredients. The diverse microporous structures of molecular sieve catalysts give them diverse catalytic properties. At the same time, the confined space of the cage and pore structure inside the molecular sieve can also effectively regulate the intermediates of the catalytic reaction. Compared with other products, molecular sieves have stronger adsorption, adjustable acidity and alkalinity, and shape selectivity of the pores. Unmodified molecular sieves have been proven to reduce the tar content in the cigarette combustion process by adding them to tobacco shreds, and remove aromatic compounds and nitrosamines in mainstream smoke.

[0003] CN100396374A discloses a catalyst for reducing the amount of carbon monoxide released in mainstream cigarette smoke, and its preparation method and application. The catalyst is composed of an active component, an auxiliary agent and a carrier, the active component is Au, Pt, Pd elements, and the auxiliary agent is Ni, Co, Fe, Cu, Zn, Ti elements. The active component of the catalyst and the auxiliary agent are distributed on the carrier in nanometer scale. The present invention can be applied to cigarettes to reduce the amount of carbon monoxide released in mainstream cigarette smoke by 20-45%.

[0004] CN101606754A discloses the preparation and application of a heat-stable manganese oxide molecular sieve catalyst for reducing CO and NO in cigarette smoke, and uses the manganese oxide molecular sieve as a catalytic material for reducing CO and NO in cigarette smoke. The manganese oxide molecular sieve is doped with metal ions. The catalyst of the present invention is a heat-stable material that can reach 600-700°C at high temperature, and has catalytic activity over a longer distance along the direction of cigarette combustion. The material has high catalytic activity at a temperature of about 200°C. The thermal stability of the catalyst powder allows it to decompose only at the highest temperature point in the cigarette combustion zone, thereby ensuring that CO and NO can be effectively reduced in a larger area of ​​the cigarette section and in a wider temperature range (200-600°C).

[0005] However, although the above catalysts can reduce harmful components in smoke, the combustion process of cigarettes determines that the catalyst added to tobacco has a shorter service life than other catalysts, so the overall cost is high, and it is necessary to find cheap raw materials to reduce the synthesis cost of the catalyst. Clean and efficient energy and resource utilization of solid waste is a key point advocated by the country, and low-cost harmless utilization of biomass ash is a part of solid waste resource utilization. Using biomass ash as raw material can effectively prepare low-cost, high-performance catalysts, which can reduce preparation costs and is a high-value utilization method with application prospects. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing a catalyst having the effect of reducing harmful components in smoke, and its products and applications, and its products and applications, wherein the catalyst can selectively catalyze harmful components in smoke and effectively reduce other harmful components without changing the nicotine content in mainstream smoke.

[0007] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a method for preparing a catalyst having the effect of reducing harmful components in flue gas, the method comprising:

[0009] (1) mixing NaOH solution with fly ash to obtain a suspension;

[0010] The metal oxide and kaolin are mixed and then ground to obtain a composite material;

[0011] (2) mixing the suspension and the composite material and then grinding them to obtain a grind;

[0012] (3) The ground material of step (2) is subjected to solid-liquid separation, and then the solid material is collected and dried to obtain the catalyst having the effect of reducing harmful components in flue gas.

[0013] The catalyst prepared by the method of the present invention with fly ash, kaolin and metal oxide as main raw materials has a loose porous structure and a large specific surface area. The pores contain water molecules, which are easily replaced by phenol molecules. When the phenol molecules enter the cavity of the catalyst, the size of the inner cavity of the inclusion compound is more matched with the size of phenol, and the ore and phenol are more firmly combined. At the same time, the porous structure and the large specific surface area are conducive to the adsorption of tar and the adsorption and removal of harmful components in the flue gas. In addition, since the metal oxide is added in the preparation process, it has more oxygen vacancies than the traditional oxide, so that the catalyst contains a large number of hydroxyl radicals, which can provide more active sites, and thus can better promote the oxidation conversion of multiple components in the flue gas and effectively remove CO.

[0014] In addition, fly ash is the main solid waste discharged from coal-fired power plants. The method of the present invention uses fly ash to obtain a catalyst that can not only effectively reduce harmful components in flue gas, but also achieves the effect of turning waste into treasure.

[0015] Preferably, the concentration of the NaOH solution in step (1) is 1-3 mol / L, for example, it can be 1.2 mol / L, 1.5 mol / L, 1.8 mol / L, 2 mol / L, 2.2 mol / L, 2.5 mol / L or 2.8 mol / L.

[0016] Preferably, the liquid-to-solid ratio of the NaOH solution to fly ash in step (1) is 0.5-1.5 g / mL, for example, it can be 0.6 g / mL, 0.7 g / mL, 0.8 g / mL, 0.9 g / mL, 1 g / mL, 1.1 g / mL, 1.2 g / mL, 1.3 g / mL or 1.4 g / mL, etc.

[0017] Preferably, the metal oxide in step (1) comprises any one of cerium oxide, aluminum oxide or copper oxide, or a combination of at least two of them.

[0018] Preferably, the metal oxide is cerium oxide, aluminum oxide and copper oxide.

[0019] Preferably, the mass ratio of cerium oxide, aluminum oxide and copper oxide is (2-5):(0.5-2):(0.1-1).

[0020] Wherein "2-5" can be 2.2, 2.5, 2.8, 3, 3.2, 3.5, 3.8, 4, 4.2, 4.5 or 4.8, etc.;

[0021] “0.5-2” can be 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.;

[0022] “0.1-1” can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.

[0023] Preferably, the mass ratio of kaolin to metal oxide in step (1) is 1:(4-6), for example, it can be 1:4.1, 1:4.3, 1:4.5, 1:4.7, 1:4.9, 1:5, 1:5.2, 1:5.5, 1:5.7 or 1:5.9, etc.

[0024] Preferably, the grinding in step (1) is carried out in a ball mill.

[0025] Preferably, the rotation speed during grinding is 500-1000 rpm, for example, it can be 550 rpm, 600 rpm, 650 rpm, 700 rpm, 750 rpm, 800 rpm, 850 rpm, 900 rpm or 950 rpm.

[0026] Preferably, the grinding time is 1-2 h, for example, it can be 1.1 h, 1.2 h, 1.3 h, 1.4 h, 1.5 h, 1.6 h, 1.7 h, 1.8 h or 1.9 h, etc.

[0027] Preferably, grinding balls are added to the ball mill during grinding.

[0028] Preferably, the amount of grinding balls added is 30-40 times the total amount of waste, for example, it can be 31 times, 32 times, 33 times, 34 times, 35 times, 36 times, 37 times, 38 times or 39 times, etc.

[0029] Preferably, the mass ratio of the suspension to the composite material in step (2) is 1:(0.5-1.5), for example, it can be 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3 or 1:1.4, etc.

[0030] Preferably, the rotation speed during the grinding in step (2) is 1000-2000 rpm, for example, it can be 1100 rpm, 1200 rpm, 1300 rpm, 1400 rpm, 1500 rpm, 1600 rpm, 1700 rpm, 1800 rpm or 1900 rpm.

[0031] Preferably, the grinding time is 2-5 h, for example, it can be 2.1 h, 2.3 h, 2.5 h, 2.7 h, 3 h, 3.1 h, 3.3 h, 3.5 h, 3.7 h, 3.9 h, 4 h, 4.3 h, 4.5 h, 4.7 h or 4.9 h, etc.

[0032] Preferably, the drying temperature in step (3) is 100-110°C, for example, it can be 101°C, 102°C, 103°C, 104°C, 105°C, 106°C, 107°C, 108°C or 109°C, etc.

[0033] Preferably, the drying time is 10-15 h, for example, 10 h, 11 h, 12 h, 13 h, 14 h or 15 h.

[0034] In a second aspect, the present invention provides a catalyst having the effect of reducing harmful components in flue gas, wherein the catalyst having the effect of reducing harmful components in flue gas is prepared by the method described in the first aspect.

[0035] In a third aspect, the present invention provides a use of the catalyst having the effect of reducing harmful components in smoke as described in the second aspect in cigarettes.

[0036] In a fourth aspect, the present invention provides a cigarette, the cigarette comprising a tobacco segment and a filter segment;

[0037] The catalyst having the effect of reducing harmful components in smoke as described in the second aspect is added to the tobacco shreds.

[0038] Preferably, the dosage of the catalyst having the effect of reducing harmful components in flue gas is 0.15-0.3g / stick, for example, it can be 0.16g / stick, 0.18g / stick, 0.2g / stick, 0.22g / stick, 0.25g / stick, 0.27g / stick or 0.29g / stick, etc.

[0039] Other specific point values ​​within the above numerical ranges can be selected and will not be described in detail here.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] (1) The catalyst having the effect of reducing harmful components in smoke obtained by the preparation method provided by the present invention can selectively catalyze harmful components in smoke and effectively reduce other harmful components without changing the nicotine content in mainstream smoke.

[0042] (2) The method of the present invention uses fly ash to obtain a catalyst that can not only effectively reduce harmful components in flue gas, but also achieve the effect of turning waste into treasure.

[0043] (3) The preparation method of the material of the present invention is simple and easy to operate, and by adding irradiation treatment during the preparation process, the mechanical properties of the material can be made stronger. DETAILED DESCRIPTION

[0044] In order to further explain the technical means and effects adopted by the present invention, the technical solution of the present invention is further described below in conjunction with the preferred embodiments of the present invention, but the present invention is not limited to the scope of the embodiments.

[0045] The raw materials described in the present invention can be used as long as they are purchased from regular dealers.

[0046] Example 1

[0047] This embodiment provides a catalyst having the effect of reducing harmful components in flue gas. The preparation method of the catalyst having the effect of reducing harmful components in flue gas is as follows:

[0048] (1) Mixing 2 mol / L NaOH solution with fly ash (solid-liquid ratio of 1 g / mL) to obtain a suspension;

[0049] (2) mixing metal oxides (cerium oxide, aluminum oxide and copper oxide) in a mass ratio of 5:1 and kaolin in a mass ratio of 3.5:1:0.8, and then putting them into a grinder with grinding balls (36 times the total amount of kaolin) and grinding at 800 rpm for 1.5 h to obtain a composite material;

[0050] (3) adding the suspension of step (1) to the composite material of step (2) (the mass ratio of the suspension to the composite material is 1:1), and then continuing to grind at 1500 rpm for 4 h to obtain a grind;

[0051] (4) The ground material of step (3) is subjected to solid-liquid separation, and then the solid material is collected and dried at 105° C. for 12 hours to obtain the catalyst having the effect of reducing harmful components in flue gas.

[0052] Example 2

[0053] This embodiment provides a catalyst having the effect of reducing harmful components in flue gas. The preparation method of the catalyst having the effect of reducing harmful components in flue gas is as follows:

[0054] (1) Mixing 1 mol / L NaOH solution with fly ash (solid-liquid ratio of 1.5 g / mL) to obtain a suspension;

[0055] (2) mixing metal oxides (cerium oxide, aluminum oxide and copper oxide) in a mass ratio of 4:1 and kaolin in a mass ratio of 5:0.5:1, and then putting them into a grinder with grinding balls (30 times the total amount of kaolin) and grinding at 500 rpm for 2 h to obtain a composite material;

[0056] (3) adding the suspension of step (1) to the composite material of step (2) (the mass ratio of the suspension to the composite material is 1:1), and then grinding at 2000 rpm for 2 h to obtain a grind;

[0057] (4) The ground material of step (3) is subjected to solid-liquid separation, and then the solid material is collected and dried at 100° C. for 15 h to obtain the catalyst having the effect of reducing harmful components in flue gas.

[0058] Example 3

[0059] This embodiment provides a catalyst having the effect of reducing harmful components in flue gas. The preparation method of the catalyst having the effect of reducing harmful components in flue gas is as follows:

[0060] (1) Mix 3 mol / L NaOH solution and fly ash (solid-liquid ratio is 0.8 g / mL) to obtain a suspension;

[0061] (2) mixing metal oxides (cerium oxide, aluminum oxide and copper oxide) in a mass ratio of 6:1 and kaolin in a mass ratio of 2:2:0.5, and then putting them into a grinder with grinding balls (40 times the total amount of kaolin) and grinding at 1000 rpm for 1 h to obtain a composite material;

[0062] (3) adding the suspension of step (1) to the composite material of step (2) (the mass ratio of the suspension to the composite material is 1:1), and then continuing to grind at 1000 rpm for 5 h to obtain a grind;

[0063] (4) The ground material of step (3) is subjected to solid-liquid separation, and then the solid material is collected and dried at 110° C. for 10 h to obtain the catalyst having the effect of reducing harmful components in flue gas.

[0064] Example 4

[0065] This embodiment provides a catalyst having the effect of reducing harmful components in flue gas. The preparation method of the catalyst having the effect of reducing harmful components in flue gas is different from that of Example 1 only in that the liquid-to-solid ratio of NaOH solution to fly ash in step (1) is 0.3 g / mL, and the concentration of NaOH solution is kept unchanged. The other steps and parameters are the same as those in Example 1.

[0066] Example 5

[0067] This embodiment provides a catalyst having the effect of reducing harmful components in flue gas. The preparation method of the catalyst having the effect of reducing harmful components in flue gas is different from that of Example 1 only in that the liquid-to-solid ratio of NaOH solution to fly ash in step (1) is 2 g / mL, and the concentration of NaOH solution is kept unchanged. The other steps and parameters are the same as those in Example 1.

[0068] Example 6

[0069] This embodiment provides a catalyst having the effect of reducing harmful components in flue gas. The preparation method of the catalyst having the effect of reducing harmful components in flue gas is different from that of Example 1 only in that the metal oxide in step (2) is cerium oxide and aluminum oxide in a mass ratio of 3.5:1, and the amount of metal oxide is kept unchanged. The other steps and parameters are consistent with those of Example 1.

[0070] Example 7

[0071] This embodiment provides a catalyst having the effect of reducing harmful components in flue gas. The preparation method of the catalyst having the effect of reducing harmful components in flue gas is different from that of Example 1 only in that the metal oxide in step (2) is cerium oxide and copper oxide in a mass ratio of 3.5:0.8, and the amount of metal oxide is kept unchanged. The other steps and parameters are consistent with those of Example 1.

[0072] Example 8

[0073] This embodiment provides a catalyst having the effect of reducing harmful components in flue gas. The preparation method of the catalyst having the effect of reducing harmful components in flue gas is different from that of Example 1 only in that the metal oxide in step (2) is aluminum oxide and copper oxide in a mass ratio of 1:0.8, and the amount of metal oxide is kept unchanged. The other steps and parameters are consistent with those of Example 1.

[0074] Example 9

[0075] This embodiment provides a catalyst having the effect of reducing harmful components in flue gas. The preparation method of the catalyst having the effect of reducing harmful components in flue gas is different from that of Example 1 only in that the mass ratio of kaolin to metal oxide in step (2) is 1:3, and the other steps and parameters are consistent with those of Example 1.

[0076] Example 10

[0077] This embodiment provides a catalyst having the effect of reducing harmful components in flue gas. The preparation method of the catalyst having the effect of reducing harmful components in flue gas is different from that of Example 1 only in that the mass ratio of kaolin to metal oxide in step (2) is 1:7, and the other steps and parameters are consistent with those of Example 1.

[0078] Embodiment 11

[0079] This embodiment provides a catalyst having the effect of reducing harmful components in flue gas. The preparation method of the catalyst having the effect of reducing harmful components in flue gas is different from that of Example 1 only in that the mass ratio of the suspension to the composite material in step (3) is 1:0.3, and the other steps and parameters are consistent with those of Example 1.

[0080] Example 12

[0081] This embodiment provides a catalyst having the effect of reducing harmful components in flue gas. The preparation method of the catalyst having the effect of reducing harmful components in flue gas is different from that of Example 1 only in that the mass ratio of the suspension to the composite material in step (3) is 1:2, and the other steps and parameters are consistent with those of Example 1.

[0082] Comparative Example 1

[0083] This comparative example provides a catalyst having the effect of reducing harmful components in flue gas, and the preparation method of the catalyst having the effect of reducing harmful components in flue gas is as follows:

[0084] (1) Mixing 2 mol / L NaOH solution with fly ash (solid-liquid ratio of 1 g / mL) to obtain a suspension;

[0085] (2) placing the suspension obtained in step (1) and grinding balls (36 times the total amount of fly ash) into a grinder and continuing grinding at 1500 rpm for 4 h to obtain a ground product;

[0086] (3) The ground material of step (2) is subjected to solid-liquid separation, and then the solid material is collected and dried at 105° C. for 12 hours to obtain the catalyst having the effect of reducing harmful components in flue gas.

[0087] Comparative Example 2

[0088] This comparative example provides a catalyst having the effect of reducing harmful components in flue gas, and the preparation method of the catalyst having the effect of reducing harmful components in flue gas is as follows:

[0089] (1) mixing metal oxides (cerium oxide, aluminum oxide and copper oxide) in a mass ratio of 5:1 and kaolin in a mass ratio of 3.5:1:0.8, and then putting them into a grinder with grinding balls (36 times the total amount of kaolin) and grinding at 800 rpm for 1.5 h to obtain a composite material;

[0090] (2) adding fly ash to the composite material of step (1) (the mass ratio of fly ash to composite material is 1:1), and then continuing to grind at 1500 rpm for 4 hours to obtain a grind;

[0091] (3) Drying the ground material of step (2) at 105° C. for 12 h to obtain the catalyst having the effect of reducing harmful components in flue gas.

[0092] Comparative Example 3

[0093] This comparative example provides a catalyst having the effect of reducing harmful components in flue gas, and the preparation method of the catalyst having the effect of reducing harmful components in flue gas is as follows:

[0094] (1) Mixing 2 mol / L NaOH solution with fly ash (solid-liquid ratio of 1 g / mL) to obtain a suspension;

[0095] (2) Cerium oxide, aluminum oxide and copper oxide in a mass ratio of 3.5:1:0.8 were mixed, and then placed in a grinder with grinding balls (6 times the total amount of cerium oxide, aluminum oxide and copper oxide) and ground at 800 rpm for 1.5 h to obtain a composite material;

[0096] (3) adding the suspension of step (1) to the composite material of step (2) (the mass ratio of the suspension to the composite material is 1:1), and then continuing to grind at 1500 rpm for 4 h to obtain a grind;

[0097] (4) The ground material of step (3) is subjected to solid-liquid separation, and then the solid material is collected and dried at 105° C. for 12 hours to obtain the catalyst having the effect of reducing harmful components in flue gas.

[0098] Comparative Example 4

[0099] This comparative example provides a catalyst having the effect of reducing harmful components in flue gas, and the preparation method of the catalyst having the effect of reducing harmful components in flue gas is as follows:

[0100] (1) Mixing 2 mol / L NaOH solution with fly ash (solid-liquid ratio of 1 g / mL) to obtain a suspension;

[0101] (2) placing kaolin and grinding balls (6 times the total amount of kaolin) into a grinder and grinding at 800 rpm for 1.5 h to obtain kaolin material;

[0102] (3) adding the suspension of step (1) to the kaolin material of step (2) (the mass ratio of the suspension to the kaolin material is 1:1), and then continuing to grind at 1500 rpm for 4 h to obtain a grind;

[0103] (4) The ground material of step (3) is subjected to solid-liquid separation, and then the solid material is collected and dried at 105° C. for 12 hours to obtain the catalyst having the effect of reducing harmful components in flue gas.

[0104] Application Example 1:

[0105] This application example provides a cigarette, which includes a tobacco shred segment and a filter segment. The catalyst with the effect of reducing harmful components in smoke of Example 1 is sprayed into the tobacco shreds, with an amount of 0.2 g / cigarette added, and the cigarette is prepared by a machine after being evenly mixed.

[0106] Application Example 2-12

[0107] This application example provides 11 kinds of cigarettes. The only difference between the cigarettes and application example 1 is that the catalysts in example 1 are replaced by catalysts in examples 2-12 in equal amounts. The structure of the cigarettes is consistent with that in application example 1.

[0108] Comparative Application Examples 1-4

[0109] This comparative application example provides 4 kinds of cigarettes. The only difference between the cigarettes and application example 1 is that the catalyst of example 1 is replaced by the catalysts of comparative examples 1-4 in equal amounts. The structure of the cigarettes is consistent with that of application example 1.

[0110] Test Example 1 Comparison of harmful chemical components released in flue gas

[0111] The cigarettes obtained from Application Examples 1-12 and Comparative Application Examples 1-4 were used as test cigarettes, and cigarettes without any other ingredients added were used as control cigarettes. The smoke captured by the test cigarettes and the control cigarettes was tested for the release of harmful chemical components.

[0112] Test method:

[0113] The tar content is determined by using a conventional analysis smoking machine for cigarettes in accordance with GB / T 19609-2004 for total particulate matter and tar;

[0114] The CO content refers to GB / T 23356-2009 Determination of carbon monoxide in the gas phase of cigarette smoke - non-scattering infrared method;

[0115] The HCN content is based on the continuous flow method for determination of hydrocyanic acid in mainstream cigarette smoke in YC / T 253-2008;

[0116] The NNK content is based on GB / T 23228-2008 Determination of tobacco-specific N-nitrosamines in total particulate matter in mainstream cigarette smoke by gas chromatography-thermal analysis;

[0117] The ammonia content is based on the determination of ammonia in mainstream cigarette smoke by ion chromatography in YC / T 377-2010;

[0118] The benzo[a]pyrene content refers to GB / T 21130-2007 Determination of benzo[a]pyrene in total particulate matter in cigarette smoke;

[0119] The phenol content is determined by high performance liquid chromatography according to YC / T 255-2008;

[0120] The crotonaldehyde content is determined by high performance liquid chromatography according to YC / T 254-2008, a method for determining main carbonyl compounds in mainstream cigarette smoke.

[0121] The results are shown in Tables 1 and 2 below.

[0122] Table 1

[0123]

[0124] Table 2

[0125]

[0126]

[0127] From the data in Tables 1 and 2, it can be seen that the catalyst with the effect of reducing harmful components in smoke obtained by the present invention has a lower content of harmful chemical components in smoke after being used in cigarettes, and the addition of kaolin and metal oxides in the preparation process can make the effect of reducing harmful components in smoke better. The addition of metal oxides and component selection, the liquid-to-solid ratio of NaOH solution to fly ash, and the mass ratio of kaolin to metal oxides in the preparation process of the catalyst will affect the adsorption effect of the catalyst.

[0128] Test Example 2 Sensory Evaluation

[0129] The cigarettes obtained in Application Examples 1-12 and Comparative Application Examples 1-4 were used as test cigarettes, and cigarettes without any other ingredients added were used as control cigarettes for sensory evaluation.

[0130] Organize 7 tasters to evaluate and score the food according to the evaluation contents and criteria in Table 3-4. The sensory quality indicators are scored on a 100-point scale.

[0131] The sensory quality evaluation indicators are: smoke volume (referring to smoke concentration and consistency), aroma and fragrance, strength, harmony, irritation and taste (aftertaste); the specific definitions of the six sensory quality evaluation indicators are shown in Table 3, and the evaluation criteria of the six sensory quality evaluation indicators are shown in Table 4.

[0132] Table 3

[0133]

[0134] Table 4

[0135]

[0136] The specific results are shown in Table 5:

[0137] Table 5

[0138]

[0139]

[0140] It can be seen from the data in Table 5 that after adding the catalyst having the effect of reducing harmful components in smoke of the present invention, not only the smoke volume is larger, the smoke aroma is stronger, fuller and softer, but also the throat irritation can be effectively reduced and the aftertaste in the mouth can be improved.

[0141] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate the preparation method of a catalyst having the effect of reducing harmful components in flue gas, its product and application, but the present invention is not limited to the above-mentioned embodiments, that is, it does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of various raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0142] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0143] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A cigarette, characterized in that: The cigarette comprises a tobacco segment and a filter segment; A catalyst having the effect of reducing harmful components in smoke is added to the tobacco segments; The catalyst having the effect of reducing harmful components in flue gas is prepared by the following method, which comprises: (1) Mixing NaOH solution with fly ash to obtain a suspension; The metal oxide and kaolin are mixed and then ground to obtain a composite material; The liquid ratio of the NaOH solution to the fly ash is 0.5-1.5 g / mL; the metal oxide includes any one of cerium oxide, aluminum oxide or copper oxide or a combination of at least two thereof; The mass ratio of kaolin to metal oxide is 1:(4-6); (2) mixing the suspension and the composite material and then grinding to obtain a grind; (3) The ground material of step (2) is subjected to solid-liquid separation, and then the solid material is collected and dried to obtain the catalyst having the effect of reducing harmful components in flue gas.

2. The cigarette according to claim 1, characterized in that The concentration of the NaOH solution in step (1) is 1-3 mol / L.

3. The cigarette according to claim 1, characterized in that The metal oxides are cerium oxide, aluminum oxide and copper oxide.

4. The cigarette according to claim 3, characterized in that The mass ratio of the cerium oxide, the aluminum oxide and the copper oxide is (2-5): (0.5-2): (0.1-1).

5. The cigarette according to claim 1, characterized in that The grinding in step (1) is carried out in a ball mill.

6. The cigarette according to claim 1, characterized in that The rotation speed during the grinding in step (1) is 500-1000 rpm.

7. The cigarette according to claim 1, characterized in that The grinding time in step (1) is 1-2 hours.

8. The cigarette according to claim 5, characterized in that During the grinding in step (1), grinding balls are added into the ball mill.

9. The cigarette according to claim 8, characterized in that The amount of the grinding balls added is 30-40 times the total amount of kaolin.

10. The cigarette according to claim 1, characterized in that The mass ratio of the suspension to the composite material in step (2) is 1:(0.5-1.5).

11. The cigarette according to claim 1, characterized in that The rotation speed during the grinding in step (2) is 1000-2000 rpm.

12. The cigarette according to claim 1, characterized in that The grinding time in step (2) is 2-5 hours.

13. The cigarette according to claim 1, characterized in that The drying temperature in step (3) is 100-110°C.

14. The cigarette according to claim 1, characterized in that The drying time is 10-15 hours.

15. The cigarette according to claim 1, characterized in that The dosage of the catalyst having the effect of reducing harmful components in flue gas is 0.15-0.3 g / piece.

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