A heating smoking set capable of reducing the content of CO in flue gas

Abstract

The application provides a heating smoking set capable of reducing the content of CO in flue gas, comprising a smoking set shell, a control module and a power supply module; the smoking set shell defines a heating cavity; a heating element is arranged on the side wall and / or the bottom of the heating cavity; a CO removal coating is arranged on the side wall and / or the bottom of the heating cavity; the CO removal coating comprises noble metal and / or transition metal oxide with CO oxidation catalytic activity. Compared with the prior art, the application coats a layer of catalyst powder coating with CO oxidation catalytic activity at the operating temperature of the heating cavity on the heating cavity of the heating smoking set, so that the flue gas during the heating process of the cigarette can be rapidly catalytically oxidized into CO2 when diffusing onto the coating, thereby reducing the content of CO in the flue gas.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tobacco, and particularly relates to a heating smoking set capable of reducing the CO content of smoke. BACKGROUND

[0002] The heating cigarette product is a product in which a heating cigarette is inserted into a heating smoking set for heating and then smoked. The heating temperature of the heating smoking set is usually about 300 DEG C, and since the cigarette is inserted into the heating cavity of the smoking set, the sheet is in a relatively closed environment, so that the heating reaction condition of the sheet in the cigarette during smoking is similar to pyrolysis. However, during the heating process of the heating cigarette, due to the reaction environment in the absence of oxygen, the groups such as carbonyl contained in the organic matters such as tobacco and glue in the sheet material will inevitably produce harmful gases such as CO during the thermal cracking reaction.

[0003] At present, consumers have higher and higher requirements for the safety of cigarette products, and reducing the CO content in the smoke of the heating cigarette can effectively reduce the degree of harm to the human body, which is one of the key fields of product research and development. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to provide a heating smoking set capable of reducing the CO content of smoke.

[0005] The present application provides a heating smoking set capable of reducing the CO content of smoke, which comprises a smoking set shell, a control module and a power supply module; the smoking set shell defines a heating cavity;

[0006] The side wall and / or the bottom of the heating cavity are provided with a heating element;

[0007] The side wall and / or the bottom of the heating cavity are provided with a CO removal coating;

[0008] The CO removal coating comprises a noble metal and / or a transition metal oxide having CO oxidation catalytic activity.

[0009] Preferably, the smoking set shell is provided with an air guide channel; the air guide channel is used to communicate the external environment with the heating cavity.

[0010] Preferably, the noble metal having CO oxidation catalytic activity is selected from one or more of Pt, Pd, Rh, Ir, Au and Ag;

[0011] The transition metal oxide is selected from one or more of cobalt oxide, copper oxide, cerium oxide, manganese oxide and iron oxide.

[0012] Preferably, the CO removal coating comprises 2-6 parts by weight of noble metal having CO oxidation catalytic activity, 15-40 parts by weight of transition metal oxide and 60-80 parts by weight of reducing active carrier.

[0013] The reducing active carrier is selected from one or more of TiO2, MnO2, CeO2, Co3O4 and Fe2O3.

[0014] Preferably, the thickness of the CO removal coating is 0.1-0.5 mm.

[0015] Preferably, the ratio of the area of the CO removal coating to the sum of the areas of the side wall and the bottom of the heating cavity is not less than 60%.

[0016] Preferably, the bottom of the heating cavity is provided with a heating element, which is a heating needle and / or a heating sheet; the air flow channel is in communication with the heating cavity through the heating needle and / or the heating sheet.

[0017] Preferably, the surface of the heating needle and / or the heating sheet is provided with a CO removal coating.

[0018] Preferably, the side wall and / or the bottom of the heating cavity is provided with a needle.

[0019] Preferably, the distance between the opening of the air flow channel in the heating cavity and the center point of the bottom of the heating cavity is not more than 3 mm.

[0020] And / or, the heating smoking set further comprises a micro air pump; the micro air pump is arranged in the air flow channel and used to introduce ambient air into the heating cavity.

[0021] The present application provides a heating smoking set capable of reducing the CO content of smoke, comprising a smoking set shell, a control module and a power supply module; the smoking set shell defines a heating cavity; the side wall and / or the bottom of the heating cavity is provided with a heating element; the side wall and / or the bottom of the heating cavity is provided with a CO removal coating; the CO removal coating comprises noble metal and / or transition metal oxide having CO oxidation catalytic activity. Compared with the prior art, the present application coats a layer of catalyst powder coating having CO oxidation catalytic activity at the operating temperature of the heating cavity of the heating smoking set, so that the smoke during the heating process of the cigarette can be rapidly catalytically oxidized to CO2 when diffusing onto the coating, thereby reducing the CO content in the smoke.

[0022] Further, the application introduces additional air into the cigarette and the heating cavity through the air guide channel, wherein the O2 can not only inhibit the in-situ CO generation during the heating process of the cigarette, but also promote the conversion of the generated CO into CO2, so that the heating smoking set has the double effects of inhibiting the in-situ CO generation and promoting the catalytic oxidation of CO compared with the conventional heating smoking set. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A structure diagram of the heating smoking set for reducing the CO content of smoke according to the application is provided.

[0024] Figure 2 A structure diagram of the heating smoking set for reducing the CO content of smoke according to the application is provided. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the application will be clearly and completely described in combination with the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, but not all the embodiments of the application. Based on the embodiments in the application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0026] The application provides a heating smoking set for reducing the CO content of smoke, which comprises a smoking set shell, a control module and a power supply module; the smoking set shell defines a heating cavity; the side wall and / or the bottom of the heating cavity are provided with a heating element; the side wall and / or the bottom of the heating cavity are provided with a CO removal coating; the CO removal coating comprises a noble metal and / or a transition metal oxide with CO oxidation catalytic activity.

[0027] Referring to Figure 1 With Figure 2 , Figure 1 With Figure 2 A structure diagram of the heating smoking set for reducing the CO content of smoke according to the application is provided, wherein 1 is a smoking set shell, 2 is a control module, 3 is a power supply module, 4 is a heating cavity, 5 is a heating element, 6 is a CO removal coating, and 7 is an air guide channel.

[0028] According to the application, the heating smoking set comprises a smoking set shell; the smoking set shell defines a heating cavity; the heating cavity is preferably a cylindrical structure, which is matched with the outer diameter of the heated cigarette and can facilitate the smooth insertion of the heated cigarette.

[0029] According to the present application, the side wall and / or the bottom of the heating cavity is provided with a heating element, and the cigarette is heated by the heating element to generate aerosol; the side wall of the heating cavity is provided with a heating element in a peripheral heating mode, and the bottom of the heating cavity is provided with a heating element in a central heating mode; preferably, the surface of the heating element is provided with a CO removal coating; in a specific embodiment provided by the present application, the side wall of the heating cavity is provided with a heating element, and the surface of the heating element is provided with a CO removal coating; in another specific embodiment provided by the present application, the bottom of the heating cavity is provided with a heating element, which is preferably a heating needle and / or a heating sheet, and the surface of the heating element is provided with a CO removal coating; the height of the heating needle is lower than the height of the heating cavity, preferably 1 / 2-3 / 4 of the height of the heating cavity.

[0030] According to the present application, the side wall and / or the bottom of the heating cavity is provided with a CO removal coating, preferably, the side wall and the bottom of the heating cavity are both provided with a CO removal coating; the thickness of the CO removal coating is preferably 0.1-0.5 mm, more preferably 0.2-0.4 mm, and even more preferably 0.3 mm; the ratio of the area of the CO removal coating to the sum of the areas of the side wall and the bottom of the heating cavity is preferably not less than 60%; the catalytic oxidation of CO molecules to CO2 molecules can be realized by the CO removal coating at 40-200°C in the presence of O2 molecules; the CO removal coating comprises a noble metal and / or a transition metal oxide having CO oxidation catalytic activity, and preferably comprises a noble metal and / or a transition metal oxide having CO oxidation catalytic activity and a reducing active carrier; the noble metal having CO oxidation catalytic activity is preferably one or more of Pt, Pd, Rh, Ir, Au and Ag; the transition metal oxide is preferably one or more of cobalt oxide, copper oxide, cerium oxide, manganese oxide and iron oxide; in a specific embodiment of the present application, the transition metal oxide is preferably a complex of CuO-CeO2, and the molar ratio of Ce to Cu in the complex of CuO-CeO2 is preferably 1.3-1.9:1; the reducing active carrier is preferably one or more of TiO2, MnO2, CeO2, Co3O4 and Fe2O3; the mass ratio of the noble metal and / or the transition metal oxide having CO oxidation catalytic activity to the reducing active carrier is preferably 0.2-0.5:1, and more preferably 0.3-0.4:1; in the present application, it is further preferred that the CO removal coating preferably comprises a noble metal having CO oxidation catalytic activity, a transition metal oxide and a reducing active carrier, and more preferably comprises 2-6 parts by weight of a noble metal having CO oxidation catalytic activity, 15-40 parts by weight of a transition metal oxide and 60-80 parts by weight of a reducing active carrier; the content of the noble metal having CO oxidation catalytic activity in the CO removal coating is preferably 3-5 parts by weight, and more preferably 4 parts by weight; the content of the transition metal oxide in the CO removal coating is preferably 15-35 parts by weight, more preferably 18-30 parts by weight, even more preferably 20-28 parts by weight, and most preferably 22-26 parts by weight; and the content of the reducing active carrier in the CO removal coating is preferably 65-80 parts by weight, more preferably 70-80 parts by weight, and even more preferably 75-80 parts by weight.

[0031] In a specific embodiment of the present application, the material of the CO removal coating is preferably prepared by the following steps: taking a noble metal and / or transition metal oxide or inorganic salt powder having CO oxidation catalytic activity and a reducing active carrier powder, and preparing a noble metal / transition metal oxide precursor by at least one of the following methods: impregnation, coprecipitation, deposition precipitation, colloidal precipitation, ultrasonic spray pyrolysis, so as to achieve the effect of uniformly dispersing the noble metal / transition metal oxide on the active carrier; and further calcining the precursor to obtain a catalyst powder having CO oxidation catalytic activity, i.e. the material of the CO removal coating.

[0032] According to the present application, the smoking set shell is preferably provided with an air guide channel for connecting the external environment and the heating cavity, which can introduce air to the smoking segment of the cigarette during the operation of the smoking set, increase the oxygen content of the smoking segment, inhibit the generation of CO and promote the generation of CO2 during heating, and facilitate the diffusion of the smoke into the heating cavity; the diameter of the air guide channel is preferably 0.5-2 mm; the opening of the air guide channel in the heating cavity is preferably located at the bottom of the heating cavity; in a specific embodiment of the present application, the bottom of the heating cavity is provided with a heating element, and the heating element is a heating needle and / or a heating sheet; the air guide channel is connected with the heating cavity through the heating needle or the heating sheet, i.e. the opening of the air guide channel in the heating cavity is located on the heating sheet and / or the heating needle, preferably, the opening of the air guide channel in the heating cavity is located on the heating sheet and / or the tip of the heating needle; in another specific embodiment of the present application, the distance between the opening of the air guide channel in the heating cavity and the center point of the bottom of the heating cavity is preferably not more than 3 mm, more preferably not more than 1 mm.

[0033] According to the present application, the heating smoking set further comprises a micro air pump; the micro air pump is arranged in the air guide channel and used to introduce ambient air into the heating cavity; in a specific embodiment of the present application, the flow rate of the air introduced by the air guide channel is preferably 0.3-2 mL / min.

[0034] According to the present application, the side wall and / or the bottom of the heating cavity is preferably provided with a needle, which can pierce the surface cigarette paper of the smoking segment of the heating cigarette, so that the smoke generated during the heating process of the smoking segment can easily diffuse into the heating cavity through the small hole in the cigarette paper and fully contact the CO removal coating.

[0035] According to the present application, the heating smoking set comprises a control module and a power supply module; the power supply module is used to supply power, and the control module controls the heating element to heat the cigarette to generate cigarette aerosol.

[0036] The present application coats a layer of catalyst powder coating with CO oxidation catalytic activity at the operating temperature of the heating cavity of the heating device in the heating cavity of the heating device, so that the smoke during the heating process of the cigarette can be rapidly catalytically oxidized to CO2 when diffusing onto the coating, and the present application introduces additional air into the cigarette and the heating cavity through the air guide channel, wherein the O2 can not only inhibit the in-situ generation of CO during the heating process of the cigarette, but also promote the rapid conversion of the generated CO into CO2, so that the heating device of the present application has the dual effects of inhibiting the in-situ generation of CO and promoting the catalytic oxidation of CO compared with the traditional heating device.

[0037] In order to further illustrate the present application, a heating device capable of reducing the CO content of smoke is described in detail below in combination with the embodiments.

[0038] The reagents used in the following examples are commercially available.

[0039] Example 1

[0040] A heating device as shown in Figure 1 is provided, which has a heating device shell, a power supply module, a heating cavity, and a control module, wherein the heating cavity is provided with a heating element, a CO removal coating, and an air guide channel. The outlet of the air guide channel is located at the center of the bottom of the heating cavity.

[0041] The thickness of the CO removal coating is 0.3 mm, and the coating is applied to the entire surface of the heating cavity. The coating is a powder coating with a composition of Pt / CuO-CeO2 / TiO2, and the content of each component is as follows: Pt 4 parts, CuO-CeO2 complex 20 parts, and TiO2 carrier 80 parts by weight.

[0042] The smoking machine is used to test the process of heating the cigarette in the heating device, and the flow rate of the introduced air is 1 mL / min during the operation of the heating device. The cigarette is smoked in the Canadian deep puffing (HCI) mode, and all the smoke during the smoking process is collected by a gas bag. The CO content in the collected smoke is determined by "Determination of Carbon Monoxide in Cigarette Smoke Gas Phase-Non-dispersive Infrared Method GB / T 23356-2009", and the detection shows that the CO concentration in the smoke is 0.12 vol%.

[0043] Example 2

[0044] A heating device as shown in Figure 2 is provided, which has a heating device shell, a power supply module, a heating cavity, and a control module, wherein the heating cavity is provided with a heating element, a CO removal coating, and an air guide channel. The outlet of the air guide channel is located at the top of the heating needle, and the height of the heating needle is 3 / 4 of the height of the heating cavity.

[0045] The thickness of the CO removal coating is 0.3 mm, and the coating is applied to the entire surface of the heating cavity. The coating is a powder coating with a composition of Pt / CuO-CeO2 / TiO2, and the content of each component is as follows: Pt 4 parts, CuO-CeO2 complex 20 parts, and TiO2 carrier 80 parts by weight.

[0046] The smoking machine is used to test the process of heating the cigarette by the smoking device. During the operation of the smoking device, the flow rate of the introduced air is 1 mL / min, the cigarette is smoked in the Canadian deep puffing (HCI) mode, and all the smoke during the smoking process is collected by a gas bag. The CO content in the collected smoke is determined by "Determination of Carbon Monoxide in Cigarette Smoke Gas Phase-Non-dispersive Infrared Method GB / T 23356-2009", and the CO concentration in the smoke is detected to be 0.09 vol%.

[0047] Example 3

[0048] A smoking device as shown in Figure 1 has a smoking device shell, a power supply module, a heating cavity, and a control module, and the heating cavity is provided with a heating element and a CO removal coating.

[0049] The thickness of the CO removal coating is 0.3 mm, and the coating is applied to the entire surface of the heating cavity. The coating is a powder coating with a composition of Pt / CuO-CeO2 / TiO2, and the content of each component is as follows: Pt 4 parts, CuO-CeO2 complex 20 parts, and TiO2 carrier 80 parts by weight.

[0050] The smoking machine is used to test the process of heating the cigarette by the smoking device. During the operation of the smoking device, the cigarette is smoked in the Canadian deep puffing (HCI) mode, and all the smoke during the smoking process is collected by a gas bag. The CO content in the collected smoke is determined by "Determination of Carbon Monoxide in Cigarette Smoke Gas Phase-Non-dispersive Infrared Method GB / T 23356-2009", and the CO concentration in the smoke is detected to be 0.19 vol%.

[0051] Comparative Example 1

[0052] A smoking device as shown in Figure 1 has a smoking device shell, a power supply module, a heating cavity, and a control module, and the heating cavity is provided with a heating element and an air flow guide channel. The outlet of the air flow guide channel is located at the center of the bottom of the heating cavity.

[0053] The heating process of a cigarette using a smoking device was tested. During operation, the airflow rate was 1 mL / min. The cigarette was smoked using the Canadian High Inhalation Concentration (HCI) mode, and all smoke was collected using an air bag. The CO content in the collected smoke was determined using the standard GB / T 23356-2009, "Determination of Carbon Monoxide in Gas Phase of Cigarette Smoke - Non-scattering Infrared Method". The CO concentration was found to be 0.42 vol%.

[0054] Comparative Example 2

[0055] like Figure 1 The smoking device shown has a smoking device shell, a power supply module, a heating cavity, and a control module. The heating cavity is equipped with a heating element.

[0056] The heating process of a cigarette using a smoking device was tested. During operation, the cigarette was smoked in Canadian deep inhalation (HCI) mode, and all smoke was collected using a gas bag. The CO content in the collected smoke was determined using the standard GB / T 23356-2009, "Determination of Carbon Monoxide in Gas Phase of Cigarette Smoke - Non-scattering Infrared Method". The CO concentration was found to be 0.51 vol%.

[0057] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A heated smoke appliance capable of reducing CO content in flue gas, characterized in that, It includes a smoking device housing, a control module, and a power supply module; the smoking device housing defines a heating cavity; Heating elements are provided on the side walls and / or bottom of the heating cavity; The sidewalls and / or bottom of the heating chamber are provided with a CO removal coating; The smoking device housing is provided with an air flow channel; the air flow channel is used to connect the external environment and the heating cavity; The CO removal coating comprises 2-6 parts by weight of a noble metal with CO oxidation catalytic activity, 15-40 parts by weight of a transition metal oxide, and 60-80 parts by weight of a reducing active carrier. The reducing active carrier is selected from one or more of TiO2, MnO2, CeO2, Co3O4 and Fe2O3; A heating element, which is a heating needle and / or a heating plate, is provided at the bottom of the heating cavity; the air guide channel is connected to the heating cavity through the heating needle and / or the heating plate. The noble metal with CO oxidation catalytic activity is selected from one or more of Pt, Pd, Rh, Ir, Au and Ag; The transition metal oxide is selected from one or more of cobalt oxide, copper oxide, cerium oxide, manganese oxide, and iron oxide.

2. The heating smoke appliance according to claim 1, characterized in that, The thickness of the CO removal coating is 0.1~0.5mm.

3. The heated smoke appliance according to claim 1, characterized in that, The area of ​​the CO removal coating shall be no less than 60% of the sum of the areas of the sidewalls and bottom of the heating chamber.

4. The heating smoke appliance according to claim 1, characterized in that, The surface of the heating needle and / or heating plate is provided with a CO removal coating.

5. The heating smoke appliance according to claim 1, characterized in that, Needle-like objects are provided on the side walls and / or bottom of the heating cavity.

6. The heated smoke appliance according to claim 1, characterized in that, The distance between the opening of the air guide channel in the heating cavity and the center point of the bottom of the heating cavity does not exceed 3 mm; And / or, the heating appliance further includes a micro air pump; the micro air pump is disposed in the air guide channel for introducing ambient air into the heating cavity.

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