TWI364322B - Dehumidifying agent and dehumidifying material - Google Patents

Description

[Technical Field] The present invention relates to a zeolite having a skeleton structure generally referred to as a γ type, which is a zeolite in which an ion pair of an acid point is sodium (hereinafter referred to as "sodium gamma type zeolite"). Dehumidifying agent and dehumidifying member carrying the Y-type zeolite [Prior Art]

In the dehumidifying apparatus which performs continuous dehumidification, it is often carried out to simultaneously perform dehumidification using a dehumidifying agent to perform dehumidification of the air to be treated, and regeneration of the dehumidifying agent which has adsorbed moisture. Therefore, in the desiccant used in the dehumidifier, not only the performance of adsorbing and removing moisture in the air to be treated (hereinafter referred to as "hygroscopic property") but also the superior performance of desorbing the adsorbed water is required. (The following is referred to as "dehumidification performance"). The dehumidifying agent which is excellent in both the adsorption performance and the dehumidifying performance is, for example, a silicone rubber, and is generally widely used as a dehumidifying agent for an industrial dehumidifying device. However, tannin extract has excellent moisture absorption performance in air with high absolute humidity, but in the air with low absolute humidity, it hardly adsorbs moisture and does not exert moisture absorption performance. Therefore, for example, in the winter when the absolute humidity is low, the dehumidifier for the dehumidifier used when the laundry is dried indoors cannot be used. A substance which can adsorb moisture in air having a low absolute humidity is known as a zeolite. The zeolite is, for example, a Y-type zeolite, an X-type zeolite, and a type A zeolite. Among them, the Y-type zeolite is lower than the X-type zeolite or the A-type zeolite because it can desorb moisture at a low temperature. It is considered to be most suitable for use as a desiccant for dehumidifying devices that continuously perform dehumidification. 5 312XP / invention manual (supplement) /94- ] 0/941丨9561

1364322 Generally, a γ-type zeolite obtained by synthesis is used, for example, a sodium γ-type zeolite in which a cation having an ion pair of a point is a sodium ion. The zeolite of the cerium type exhibits superior moisture absorption performance even in a low-humidity air at a moisture absorption rate. However, in the case where the desiccene type zeolite has insufficient dehumidification performance, in order to dehumidify by heating, the sodium cerium type zeolite can be regenerated, and a large amount of heat energy is required, so that an increase problem occurs. . Therefore, since the self-study, the sodium ion of the sodium cerium type zeolite is exchanged for other cations, and the enthalpy of the sorption and desorption performance of the cerium type zeolite can be adjusted. For example, Japanese Patent Laid-Open Publication No. 2000-1995 discloses a cerium type zeolite in which the sodium cerium type zeolite is ion-exchanged with a metal other than sodium. SUMMARY OF THE INVENTION However, when an ion-exchanged zeolite is applied by using a metal ion other than the sodium, the dehumidification performance is gradually lower than that of the sodium-yttrium-type zeolite. The problem occurred. Therefore, an object of the present invention is to provide a moisture retention performance (hereinafter referred to as "repetitive durability") when the desorption of moisture is exhibited even in an absolute air, which exhibits superior moisture absorption performance and desorption performance. In order to solve the problems of the above-mentioned conventional techniques, the inventors of the present invention have found that the specific physical properties of the sodium strontium type zeolite are set to 312 ΧΡ / invention specification (supplement) / 94. -10/941 ] 9561 The zeolite acid is faster than this. The specific dehumidification operation cost, the performance of the dehumidification performance is superior to that of the ion treatment of the 2 3 9 1 5 6 , but the reduced humidity is low, and the repetition is the “dry and wet intrusion study setting range, 6 1364322, the dehumidification performance of the sodium γ-type zeolite is improved, and the moisture absorption performance and the dehumidification performance are well balanced, and the present invention is completed. In other words, the desiccant provided by the invention (1) is S i 0 . 2 / A 12 0 3 Y-type zeolite having a molar ratio of 4.0 to 6.0, a Na 2 〇 / Al 2 〇 3 molar ratio of 0.5 to 1.0, and an average particle diameter of 3 / / m or less. Further, the present invention (2) The dehumidifying member is provided with a S i 0 2 /A 12 0 3 molar ratio of 4.0 to 6.0, a Na 2 〇/Al 2 〇 3 molar ratio of 0.5 to 1.0, and an average particle diameter of 3 μm or less. Y zeolite is supported on a carrier.

The dehumidifying agent and the dehumidifying member of the present invention have excellent balance between moisture absorption performance and dehumidifying performance, and excellent dry-wet repeat durability, so that moisture in the air having a low absolute humidity can be well removed, and Reduce operating costs. [Embodiment] The desiccant of the present invention has a skeleton structure generally called Y-type zeolite, and the ion pair of the acid point is a Y-type zeolite of sodium ion. Further, the Y-type zeolite can be represented by the general formula (1) X N a 2 0 · A 1 2 0 3 · y S i Ο 2 · z Η 2 Ο (1). In the general formula (1), x 値 (ie, N a 2 Ο / A 12 0 a molar ratio) is 0.5 to 1 · 0, preferably 0. 6 to 0.9. If the X 未 is less than 0.5, the moisture in the air having a low absolute humidity cannot be sufficiently removed, and if it is more than 1.0, the X 无法 is difficult to dehumidify. Therefore, the heat energy (hereinafter referred to as "dehumidification energy") required for desorption of the moisture adsorbed by the Y-type zeolite will increase. Further, y 値 (ie, S i 0 2 / A 1 2 0 3 molar ratio) is 4. 0 ~ 6 · 0, preferably 4. 0 ~ 5. 5 . If the y 未 is less than 4.0, the dehumidification energy will increase because it is more difficult to dehumidify. Otherwise, 7 312XP/invention specification (supplement)/94-10/94119561 1364322 exceeds 6. Ο, because of moisture The adsorption capacity is low, so that the moisture in the air with low absolute humidity cannot be sufficiently removed. Further, in the case where the zeolite is a quinoid type zeolite, it can be confirmed by performing a diffraction pattern obtained by X-ray diffraction analysis. The cerium type zeolite has an average particle diameter of 3 y m or less, preferably 0.8 to 2. Ο V m.

If the average particle diameter exceeds 3 // m, since it is difficult to dehumidify, it is necessary to regenerate the Y-type zeolite to require a large amount of dehumidification energy. Even if the Na 2 0 / A 12 0 3 molar ratio is the same as that of the Si〇2/Al2〇3 molar ratio, the desorption energy will be greatly different depending on the average particle size. . For example, the average particle size 3 " m is about 20% less than the average particle size of 5 // m. Further, in the present invention, the "dehumidification energy j" is a thermal energy required to dehumidify 1 g of water adsorbed to the Y-type zeolite from the Y-type zeolite. The method is determined. (i) First, the Y-type zeolite is dried in a dryer at 500 ° C for 2 hours. Then, the zeolite is taken out from the dryer and placed in a desiccant. In a drying dish, the zeolite was cooled to 25 ° C. Then, the zeolite was placed in a weighing bottle, and the weighing bottle was closed, weighed by a weigher, and the weight of the zeolite was measured (dry) Weight X ( g )). ( ii ) The dried zeolite was placed in a drying dish controlled to 25 ° C, 90% R 4 for 48 hours. Then, the zeolite was weighed. In the bottle, the weighing bottle is closed, weighed by a weigher, and the weight (hygroscopic weight Y (g)) of the zeolite is measured. (iii) Then, the moisture absorption weight Y値 is reduced by the dry weight X値, and the saturated adsorbed moisture content of the zeolite is obtained. (i ν) Next, the zeolite after absorption is weighed 20.0 mg, 8 31 2XP/Invention Manual (Supplement ffi/94-10/94) 19561 1364322 Using a differential scanning calorimeter (DSC) to determine the thermal energy required to dehumidify moisture from the zeolite after moisture absorption (Z (J )) (v) Calculate the dehumidification energy (J / g) according to the following formula (2). Dehumidification energy = (ZxX) / {0 · 02x (YX) } (2)

Since the cerium type zeolite has excellent dry-wet repeat durability, it will prolong the life when used as a dehumidifying agent, and thus it will reduce operating costs. In addition, the dry-wet repeat durability of the cerium-type zeolite can be grasped by measuring the moisture absorption rate of the cerium-type zeolite before and after the dry-wet repeat test, and the moisture absorption rate before the dry-wet repeat test, When there was no change in the moisture absorption rate after the test, it was judged that the dry-wet repeat durability was in a good state. Further, in the present invention, the "dry-wet repeat test" means that the cerium-type zeolite is heated at 80 ° C for 10 minutes, and then cooled to 2 in a drying dish in which a desiccant is placed. 5 ° C, then placed in a drying dish at 25 ° C, 50% R Η for 10 minutes, and repeat the test of this operation 100 times. The cerium type zeolite is, for example, a sodium Y zeolite having a Na 2 0 / A 1 2 3 3 molar ratio and a S i 0 2 / A 1 2 3 molar ratio in the above range, using dry pulverization, wet type It can be obtained by pulverizing and other common methods, and it can be obtained by grading according to the usual method such as sieving. The Y-type zeolite of the present invention has a Na2〇/Al2〇3 molar ratio, a Si〇2/Al2〇3 molar ratio and an average particle diameter within the above range, and can have an air having a lower absolute humidity. The moisture absorption performance required for moisture adsorption is small, and the dehumidification energy at the time of regeneration is small. Therefore, the Y-type zeolite has a good balance between moisture absorption performance and dehumidification performance. According to this, by setting the physical properties of the specific Y 3 zeolite 2, the invention specification (supplement)/94-] 0/94119561 1364322 of the nano-Y zeolite having superior wet and dry repeatability, it can be provided within a specific range. Even in the air with low absolute humidity, it can exert superior dehumidification performance and dehumidification performance, and the desiccant is excellent in dry and wet repeating.

The dehumidifying agent of the present invention is a honeycomb-type rotor in which a dehumidifying agent is carried as a porous honeycomb structure having a plurality of small through-holes therein. The honeycomb type wheel train is divided into: a dehumidification zone for performing dehumidification of the treated air; a regeneration zone for performing the regeneration of the dehumidifier; and a cooling zone for performing cooling by a honeycomb rotor heated in the regeneration zone. The desiccant is moved in the order of the dehumidification zone, the regeneration zone, and the cooling zone by the rotation of the honeycomb wheel. The dehumidifying member of the present invention has a S i 0 2 / A 12 0 3 molar ratio of 4.0 to 6. 0, N a 2 0 / A 1 2 0 3 molar ratio of 0.5 to 1. 0. The Y-type zeolite having a particle diameter of 3 // m or less is carried on the carrier. The carrier is only required to belong to a porous body capable of supporting the Y-type zeolite, and the rest is not particularly limited, and is preferably a honeycomb structure carrier, especially in the patent application Japanese Patent Publication No. 5 9 - 1 0 3 4 It is disclosed in the publication No. 5 that it is preferably composed of a high void ratio inorganic fiber paper. The inorganic fiber paper is produced by using inorganic fibers such as alumina fibers, cerium oxide alumina fibers or glass fibers, and preferably has a high void ratio of 70 to 9 5%. The method of supporting the Y-type zeolite is not particularly limited and can be carried out according to a usual method. For example, the Y-type zeolite is mixed with an inorganic binder such as cerium oxide sol, alumina sol or titania sol to form a suspension suspended in water, and then the carrier is immersed in the suspension, or the suspension is coated. On the carrier, the Y-type zeolite is sufficiently absorbed by the carrier and the excess 10 312XP/invention specification (supplement)/94-10/94119561 is removed.

1364322 After drying, the method of drying is fixed. At this time, the mass bonding dose to be used is preferably set to the limit required for fixing to the surface of the carrier, because the hygroscopic property of the inorganic binder may be reduced to cover the surface of the zeolite, resulting in the moisture absorption property of the zeolite γ. Reduced condition. In the following, the present invention will be described more specifically by way of illustration and not by way of limitation. <Example 1 &gt; (Production of sodium Y-type zeolite) The content of SiCh was 63% by weight, the content of Al2〇3 was 24% by weight, and the content was 13% by weight (Si〇2/Al2〇3 molar ratio 4.46, Na2) The sodium Y zeolite A having a 径/Al2〇3 ratio of 0.89 is subjected to pulverization and classification to obtain a sodium Y zeolite B having a flat diameter of 1.2 mM. (Hygroscopicity test) Except that the sample was previously pulverized and operated using a sieve having a size of J I S Z 8 8 0 1 or less, the moisture absorption test was carried out in accordance with J I S Z 0 7 0 1 -. The results are shown in Table 1. In addition, the temperature in the drying dish of the hygroscopic test was 2 6 °C. (Measurement of Dehumidification Energy) First, sodium Y zeolite B was dried in a 500 ° C dryer for an hour. After drying, the zeolite was taken out of the dryer and the zeolite was cooled to 25 ° C in a drying m of the desiccant. Then, the flask was placed in a weighing bottle, and the weighing bottle was closed, and the dry weight (X) of the zeolite was measured by a scale, and the result was 0.20 g. Next, the zeolite after drying, in a drying dish controlled to 2 5 ° C, 90% R Η 312XP / invention instructions (supplement) /94- ] 0/94119561 inorganic small poles

Na2〇 Moer granules 840 1977 Time-test Dry 2 into the dry i-stone quantity, , in the middle, 11 1364322 placed for 4 8 hours. Then, the zeolite was placed in a weighing bottle, and the weighing bottle was closed, weighed by a weigher, and the moisture absorption weight (Y) of the zeolite was measured, and as a result, it was 0.161 g. Next, weighed 2 0 · 0 mg of the zeolite after moisture absorption, using a differential scanning calorimeter (DSC) (DSC 8 2 3 0 D, manufactured by Ricky, Inc.), and the temperature was increased from 30 °C to 10 °C. The temperature was raised in a temperature rising condition of ° C /min, and the thermal energy (Z ) required for dehumidifying the water from the zeolite after moisture absorption was measured and found to be 1 9 · 5 2 J. Then, the dehumidification energy was calculated according to the following formula (2), and the result was 3. 2 X 1 0 3 J / g.

Dehumidification energy (J/g)=(ZxX)/{0.02x(YX)} (2) (dry and wet repeat test) Sodium Y zeolite B (10g) was applied in an automatic hoisting furnace at 800 °C After heating for 10 minutes, it was cooled to 25 ° C in a dry orphan placed in a desiccant, and then placed in a dry hail at 25 ° C, 50 % R 1 for 10 minutes, repeating this operation 10 0 times, and the dry and wet repeated test was performed. (Evaluation of Dry and Wet Repeat Durability) Next, the moisture absorption rate of the sodium cerium type zeolite 前 before and after the dry and wet repeated test was measured, and the amount of change in the moisture absorbing speed before and after the dry and wet repeated test was performed. Wet repeat assessment of longevity. The moisture absorption rate was measured by heating in a temperature of 20 (TC) for 1 hour, and then cooling the sodium sulphate type in the dry m placed in the desiccant; The balance was set in a room at 5 °C and 50% R 。. The weight was measured every 5 seconds, and the weight was measured for 10 minutes. Next, each weight was measured every 5 seconds. Calculate the weight gain from the previous weight measurement and divide by the measurement interval (5 seconds) to calculate the weight change per unit time (mg / 12 312XP / invention manual (supplement) / 94-10/94119561 1364322 sec.) Calculate each weight change for all weight measurements performed for 1 〇 minutes and determine the average enthalpy (mg / sec). Then divide the average 値 by the y-type zeolite B The weight is lg and is regarded as the moisture absorption rate per lg (mg/sec). The moisture absorption rate of the nano-γ zeolite B is before the test, at 25 ° C, 50% R Η air, per lg 0.27 mg / sec, and also 0.27 mg / sec after the test, no change. <Comparative Example 1 &gt; (hygroscopicity test)

The same procedure as in Example 1 was carried out except that the sodium Y zeolite B was replaced with a type A silicone rubber (Galleon Silicone A, manufactured by Mizusawa Chemical Co., Ltd.). The results are shown in Table 1. <Comparative Example 2 &gt; (Hygroscopicity Test) The same procedure as in Example 1 was carried out except that the sodium-type zeolite B was replaced with a type B tannin (Galleon Silicon B, manufactured by Mizusawa Chemical Co., Ltd.). . The results are shown in Table 1. (Table 1) Example 1 Comparative Example 1 Comparative Example 2 Relative humidity (2 6 °C) %RH (absolute humidity g / kg) 20 (4.42) 27 8 3 50 (11.2) 31 20 10 90 (20.4) 33 30 50 Accordingly, the sodium Y zeolite B of Example 1 will have a certain hygroscopicity irrespective of absolute humidity, and even in air with low absolute humidity, it still shows 13 312XP/invention specification (supplement)/94- 】 0/941 ] 9561 1364322 High hygroscopicity. On the other hand, the type A silicone of Comparative Example 1 and the type B silicone of Comparative Example 2 have lower absolute humidity, lower hygroscopicity, and exhibit very low hygroscopicity in air having a lower absolute humidity. <Comparative Example 3 &gt; (Production of Sodium Y Zeolite) The sodium Y zeolite A used in Example 1 was pulverized and classified to obtain a nano Y zeolite C having an average particle diameter of 5.1 μm. (Measurement of dehumidification energy, dry and wet repeat test, dry and wet repeat durability)

The same procedure as in Example 1 was carried out except that the sodium Y zeolite B was replaced with the sodium Y zeolite C. As a result, the dehumidification energy was 4. Ο X 1 03 J / g. In addition, the moisture absorption rate before the dry-wet test was in the air at 25 ° C, 50% 1 ^, 0.2611 ^ / sec per 1 £, and 0.2611 ^ / sec after the test, no change. <Comparative Example 4 &gt; (Production of Sodium Y Zeolite) The Si〇2 content was 76.3 wt%, the Al2〇3 content was 16.2% by weight, and the Na2〇 content was 7.3 wt% (Si〇2/Al2〇3 mol The nano-Y zeolite E having an average particle diameter of 4.5 / zm was obtained by pulverizing and classifying the sodium Y-type zeolite D of 5.1, Na2〇/Al2〇3 molar ratio of 0.76. (Measurement of dehumidification energy, dry-wet repeat test, dry-wet repeat durability) Except that sodium Y zeolite B was replaced, and sodium Y zeolite E was used, the same procedure as in Example 1 was carried out. As a result, the dehumidification energy was 3. 8 X 1 0 3 J / g. In addition, the moisture absorption rate before the dry-wet repeat test is air t at 25 ° C, 50% R ,, per 1 g is 〇. 2 6 mg / sec, after the test is also 0. 2 6 mg / 14 312XP / invention manual (supplement) /94-丨0/94119561 1364322 seconds, no change. <Comparative Example 5 &gt; (Production of potassium Y zeolite) The sodium Y zeolite A used in Example 1 was impregnated at 80 ° C in an aqueous solution of 0. 9 m ο 1 / L of potassium carbonate. 12 hours. The Y-type zeolite was filtered and washed with water, and then dried at 200 ° C for 2 hours to obtain a Y-type zeolite (hereinafter referred to as "potassium Y-type zeolite F j ") which was ion-exchanged with potassium ions. The composition ratio of the obtained potassium Y zeolite F is S 0 0 2 content 60 0. 0 #重量%, Α12〇3 content rate 22.9% by weight, K2〇 content rate 13.7% by weight, Na2〇 content rate 3.4% by weight ( Si〇2/Al2〇3 Mo Er ratio 4.5, Na2〇/Al2〇3 Mohr ratio 0 · 1 2 ) (Determination of dehumidification energy, dry and wet repeat test, dry and wet repeat durability) In addition to substituted sodium Y type The zeolite B was changed to the potassium Y zeolite F, and the rest was carried out in the same manner as in Example 1. As a result, the dehumidification energy was 4. 2 X 1 0 3 J / g. In addition, the wet and dry repeated test before the suction The wet speed is at 25 ° C,

The air of 50% RH was 0.26 mg/sec per lg, and 0.24 mg/sec after the test. <Comparative Example 6 &gt; (Production of 镧Y-type zeolite) The sodium Y-type zeolite A used in Example 1 was placed in an aqueous solution of 0.3 m ο 1 / L of lanthanum nitride (L a C 13 ). Immersed at 80 ° C for 12 hours. The Y-type zeolite was filtered and washed with water, and then dried at 200 ° C for 2 hours to obtain a Y-type zeolite (hereinafter referred to as "镧 Y-type zeolite G") which was ion-exchanged with cerium ions. The obtained 镧Y-type zeolite G has a composition system S i 0 2 containing 15 312 XP/invention specification (supplement)/94-10/94119561 1364322 at a rate of 60.6 wt%, a Α1ζ〇3 content of 20.8% by weight, and a La2〇3 content. The rate is 14.7 wt%, and the content of Na2〇 is 3.7% by weight (Si (h/Al2〇3 Mo. Ear ratio 5.0, Na2〇/Al2〇3 molar ratio 0.3). (Measurement of dehumidification energy, dry and wet repeat test, Dry-wet repeat durability) Except that sodium Y zeolite B was replaced, and y-type Y zeolite G was used, the same procedure was carried out as in Example 1. As a result, the dehumidification energy was 3. 4 X 1 0 3 J / g. In addition, the moisture absorption rate before the dry-wet repeat test is in air at 25 ° C, 50% R ,, per 1 g is 0.24 mg / sec, after the test is 0. 2 1 mg <Example 2 &gt; (Production of member for dehumidification) A honeycomb made of yttria alumina fiber paper (thickness: 0.2 mm, void ratio: 90%) and having a lattice of 3.0 mm in width and 1.6 mm in height The structure carrier (manufactured by NIC Η IAS Co., Ltd., trade name: Sanniker) was cut into a cylindrical shape having a diameter of 270 mm and a thickness of 17 mm to form a carrier. The sodium Y-type zeolite B (90 parts by weight) obtained in Example 1 and the cerium oxide sol ("trade name: sindeke" (solid content: 30% by weight, manufactured by Nissan Chemical Co., Ltd.)) 30 parts by weight And the mixture was mixed with water to prepare a slurry. After the honeycomb structure carrier was immersed in the obtained slurry, the excess slurry was removed and dried to obtain a member for dehumidification. (Dry-wet repeat test, evaluation of dry-wet repeat durability) The same procedure as in Example 1 was carried out except that the sodium hydrazine type zeolite 1 (10 g) was replaced with the dehumidification member Η. The moisture absorption rate is 1 g per 1 g of sodium strontium zeolite contained in the dehumidifying member, and 16 312 XP/invention specification (supplement)/94-〗 0/94119561 before the test.

1364322 Ο . 2 7 m g / sec, after the test is also Ο 2 7 m g / s, no change. (Dehumidification endurance test) The dehumidification member 制 obtained by the above method was attached and mounted using a rotating device of a device (F-Y100Z3, manufactured by Matsushita Ecology Systems Co., Ltd.), and the dehumidifying device was set to be controlled at 25 °. In the constant temperature and humidity room of C, 1000 wet operation is performed according to the "automatic" operating conditions. Then, the amount of dehumidification after 1 hour from the start of the test, and then between 1 hour and 2 hours, and the hour after 9 hours (the 9th hour to the 1st hour) were measured. The dehumidification amount is obtained, and the dehumidification durability of the member 求 is obtained. The results are shown in Table 2. In addition, the dehumidifier was placed on an electronic balance and operated according to the "automatic" running bar, and the weight gain was recorded every one minute, and the weight was measured by measuring 1 small increase. Further, the dehumidification rate reduction rate is obtained by the following formula (3), when the amount of dehumidification is set to P g /hr, and the dehumidification amount after 100 hours is set to be an hour. Dehumidification rate reduction rate (°/.) = { ( P - Q ) / P丨X 1 0 0 <Comparative Example 7 &gt; (Manufacture of dehumidifying member) Except that the sodium Y zeolite B obtained in Example 1 ( 90 parts by weight of the yttrium-type zeolite G (90 parts by weight) obtained in Comparative Example 6 was carried out in the same manner as in Example 2 to obtain a member for dehumidification (dehumidification durability test). The same procedure as in Example 2 was carried out except that the member J for dehumidification was used. The results are shown in Table 2. 312XP/Invention Manual (Supplement)/94-10/94119561 When it is used for dehumidification and dehumidification with 50% RH (Qg/ after the total time when the wet dehumidification system is used for the first time), use it instead. The rest are all 17 1364322 (Table 2) Example 2 Comparative Example 7 Dehumidification amount (g / hour) Between 1 and 2 hours 385 390 9 9 to 1 0 0 hour between 377 344 Dehumidification reduction rate (% According to the dehumidification durability test of the dehumidification member of Example 2, even if the dehumidification durability test was performed for 1 hour, the dehumidification reduction state was extremely low, and the durability was excellent.

312ΧΡ/Invention Manual (supplement)/94-] 0/941195 61 18

Claims (1)

1364322 X. Patent application scope: 1. A desiccant characterized by Si〇2/Al2〇3 4. 0~6. 0, Na2〇/Al2〇3 molar ratio is 0·5~1· 0, below Zeolite type zeolite. 2. The following Y-type zeolite, characterized by a component of the dehumidification, characterized in that it is S i 0 4. 0~6. 0, 2〇/六12〇3 molar ratio is 0. 5~1. Hold on the carrier. 3. For example, the honeycomb structure carrier for the dehumidification system of claim 2 is applied. The molar ratio is 3 // m 2 / A 1 2 0 3 molar ratio and the average particle size is 3 // m pieces, wherein the above loading 312XP / invention manual (supplement) /94-] 0/94丨1956]