JP2006272329A - Dehumidifying agent and dehumidifying rotor - Google Patents
Dehumidifying agent and dehumidifying rotor Download PDFInfo
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- JP2006272329A JP2006272329A JP2006089351A JP2006089351A JP2006272329A JP 2006272329 A JP2006272329 A JP 2006272329A JP 2006089351 A JP2006089351 A JP 2006089351A JP 2006089351 A JP2006089351 A JP 2006089351A JP 2006272329 A JP2006272329 A JP 2006272329A
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- Prior art keywords
- titanium oxide
- dehumidifying agent
- dehumidifying
- agent
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000010335 hydrothermal treatment Methods 0.000 claims abstract description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 32
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 239000002274 desiccant Substances 0.000 claims description 5
- 238000007791 dehumidification Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000003795 desorption Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000000741 silica gel Substances 0.000 description 4
- 229910002027 silica gel Inorganic materials 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000003917 TEM image Methods 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003230 hygroscopic agent Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
Landscapes
- Drying Of Gases (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
本発明は、空気中の水分を除去できる除湿剤及びその除湿剤を内蔵する除湿ロータに関する。 The present invention relates to a dehumidifying agent capable of removing moisture in the air and a dehumidifying rotor incorporating the dehumidifying agent.
空気中の水分を吸収、吸着する除湿剤は空調用、冷凍サイクルなど多くの産業分野で実用化されており、家庭用にも各種除湿剤が市販されている。このような除湿剤としては、シリカゲル、活性炭、活性アルミナ、ゼオライトなどが一般的に知られている。このような除湿剤は使い捨てる場合もあるが、工業用途では水分を吸収した除湿剤から水分を除去し再度除湿剤として使用することが一般的に行われている。水分を除去する方法としては一般的に熱風を利用する方法がとられている。除湿剤としては多量の水分を吸収できて、尚かつ簡単に水分を放出するものが求められていたが、そのような特性を満たす除湿剤はこれまでなかった。
特許文献１では、多孔質な粉末にシリカゲルを混合して吸放出特性を改良する技術が知られている。特許文献２では、除湿ロータとして、ゼオライトを除湿剤とする技術が開示されている。
特許文献３では、ナノチューブ構造で、比表面積が大きな酸化チタンを製造する技術が開示されている。酸化チタンは古くから白色顔料として知られており、紫外線吸収剤としても利用されてきた。また、最近はその光触媒作用から有害物質の分解や色素増感太陽電池等多くの分野で注目を集めている材料ではあるが、除湿剤や吸湿剤として有用な材料であるということは知られていなかった。
In Patent Document 1, a technique for improving absorption / release characteristics by mixing silica gel with porous powder is known. Patent Document 2 discloses a technique using zeolite as a dehumidifying agent as a dehumidifying rotor.
Patent Document 3 discloses a technique for manufacturing titanium oxide having a nanotube structure and a large specific surface area. Titanium oxide has long been known as a white pigment and has been used as an ultraviolet absorber. In addition, although it is a material that has recently attracted attention in many fields such as decomposition of harmful substances and dye-sensitized solar cells due to its photocatalytic action, it is known that it is a useful material as a dehumidifying agent or hygroscopic agent. There wasn't.
特許文献３の酸化チタンはチューブ状の長繊維形状をしており、その比表面積が３００平方メートル／ｇである。除湿材としての性能に関しては今までに全く報告がない。また、特許文献２には、除湿ロータに関する技術が開示されているが、そこで使用する除湿剤はゼオライトなどの公知の材料を用いるもので、除湿効果としては必ずしも満足できるものではなかった。本発明は、このような現状に鑑み、吸水速度が速く、吸水率も高く、更に簡便な手法で水分を放出できる除湿剤を提供し、そのような除湿剤を用いた除湿ロータを提供することを課題とする。 The titanium oxide of Patent Document 3 has a tubular long fiber shape, and its specific surface area is 300 square meters / g. There has been no report on the performance as a dehumidifying material. Patent Document 2 discloses a technique related to a dehumidification rotor. However, a dehumidifying agent used there is a known material such as zeolite, and the dehumidifying effect is not always satisfactory. In view of such a current situation, the present invention provides a dehumidifying agent that has a high water absorption rate, a high water absorption rate, and can release moisture by a simpler method, and a dehumidifying rotor using such a dehumidifying agent. Is an issue.
本発明者等は鋭意研究を重ねた結果、長繊維形状の酸化チタンが従来の除湿剤よりも優れた水分の吸放出特性を有することを見いだし本発明を完成した。このような長繊維形状の酸化チタンは、酸化チタンを主成分とする材料を、アルカリ性水溶液中で水熱処理することによって製造することができる。このようにして製造された長繊維形状の酸化チタンは、直径が２〜８０ｎｍで、長さが１００ｎｍ以上であった。その比表面積は２００〜１０００平方メートルであり、水分の吸収能力は乾燥重量の３０％以上であった。このようにして得た除湿剤を内蔵した除湿ロータを作成することでもう一方の課題も達成できた。 As a result of intensive studies, the present inventors have found that long fiber-shaped titanium oxide has moisture absorption / release characteristics superior to those of conventional dehumidifiers, and thus completed the present invention. Such a long fiber-shaped titanium oxide can be produced by hydrothermally treating a material mainly composed of titanium oxide in an alkaline aqueous solution. The long fiber-shaped titanium oxide thus produced had a diameter of 2 to 80 nm and a length of 100 nm or more. Its specific surface area was 200 to 1000 square meters, and the water absorption capacity was 30% or more of the dry weight. By creating a dehumidifying rotor incorporating the dehumidifying agent thus obtained, the other problem could be achieved.
従来の除湿剤に比べて湿度が９５％といった非常に高い湿度条件下で、従来の除湿剤より遙かに大きな吸水性能を有し（図４参照）、その大きな吸水能力にも拘わらず比較的容易に水分を放出する性質を有しており、除湿ロータ及びデシカント除湿機用の除湿剤として極めて適したものである。表１に本発明の除湿剤を含めた各種除湿剤の主要特性をまとめて示した。 Compared to conventional dehumidifiers, it has a much higher water absorption performance than conventional dehumidifiers under a very high humidity condition of 95% (see FIG. 4). It has a property of easily releasing moisture, and is extremely suitable as a dehumidifying agent for a dehumidifying rotor and a desiccant dehumidifier. Table 1 summarizes the main characteristics of various dehumidifying agents including the dehumidifying agent of the present invention.
本発明の長繊維形状の酸化チタンを含有する除湿剤は、酸化チタンを主成分とする材料を、アルカリ性水溶液中で加熱処理することで作成することができる。原料は粉末状でもゾレゲルタイプの形状でも処理後は繊維形状のものを得ることができる。アルカリ性水溶液の濃度は５〜２５モル／Ｋｇの水溶液が好ましく、処理温度は７０〜１５０℃の範囲が好ましい。処理時間は１０〜３０時間の範囲が好ましい。アルカリ水溶液としては、水酸化ナトリウム及び水酸化カリウムを水に溶かした液を使用することができる。水酸化カリウムを用いた場合には、より比表面積の大きな長繊維形状の酸化チタンを得ることができるので特に好ましい。本発明の除湿剤が十分に水分を吸収した後に、その水分を除去する方法としては、温風を吹き付ける方法がある。マイクロ波や遠赤外線といった電磁波を利用して除湿剤を再生する方法も有力である。
除湿剤が水分を吸湿した後にその水分を放出して除湿剤が再生するのに必要な時間を評価した結果を表２に示した。
更に、図面に基づいて詳細に説明する。図１は、本発明に係る除湿剤の走査型及び透過型電子顕微鏡写真である。図２は、本発明除湿剤を含有する除湿ロータの斜視図及び断面図である。図３は、本発明の除湿ロータを配置したデシカント空調装置の概略図である。図４は、本発明除湿剤と従来の除湿剤との水分の吸収特性を表すグラフである。この図から、処理前の酸化チタン含有物はわずかな水分吸収しか示さないが、水熱処理して得られた長繊維形状の酸化チタン含有物では、大きな水分吸収性能を示し、除湿剤として極めて優れた吸収特性を有することが分かる。特に、高湿度下では、吸着特性と脱着特性が重なり極めて脱着性能が良いことが分かる。一方、除湿剤としてよく知られたシリカゲルの場合には吸着特性に比べて、脱着特性は左側にずれていることから脱着に時間がかかっていることが分かる。The dehumidifying agent containing the long fiber-shaped titanium oxide of the present invention can be prepared by heat-treating a material mainly composed of titanium oxide in an alkaline aqueous solution. The raw material can be in the form of a fiber after processing, whether it is in powder form or in the form of Zolegel type. The concentration of the alkaline aqueous solution is preferably an aqueous solution of 5 to 25 mol / Kg, and the treatment temperature is preferably in the range of 70 to 150 ° C. The treatment time is preferably in the range of 10 to 30 hours. As the alkaline aqueous solution, a solution in which sodium hydroxide and potassium hydroxide are dissolved in water can be used. When potassium hydroxide is used, long fiber-shaped titanium oxide having a larger specific surface area can be obtained, which is particularly preferable. As a method for removing moisture after the dehumidifying agent of the present invention has sufficiently absorbed moisture, there is a method of blowing warm air. Another effective method is to regenerate the dehumidifier using electromagnetic waves such as microwaves and far infrared rays.
Table 2 shows the results of evaluating the time required for the dehumidifier to regenerate by releasing the moisture after the dehumidifier absorbs moisture.
Furthermore, it demonstrates in detail based on drawing. FIG. 1 is a scanning and transmission electron micrograph of the dehumidifying agent according to the present invention. FIG. 2 is a perspective view and a sectional view of a dehumidifying rotor containing the dehumidifying agent of the present invention. FIG. 3 is a schematic view of a desiccant air conditioner in which the dehumidifying rotor of the present invention is arranged. FIG. 4 is a graph showing the moisture absorption characteristics of the present dehumidifier and the conventional dehumidifier. From this figure, the titanium oxide-containing material before treatment shows only a slight water absorption, but the long fiber-shaped titanium oxide-containing material obtained by hydrothermal treatment exhibits a large water absorption performance and is extremely excellent as a dehumidifying agent. It can be seen that it has an absorption characteristic. In particular, it can be seen that, under high humidity, the adsorption and desorption characteristics overlap and the desorption performance is extremely good. On the other hand, in the case of silica gel, which is well known as a dehumidifying agent, the desorption characteristic is shifted to the left as compared with the adsorption characteristic, and it can be understood that desorption takes time.
粒径２０ｎｍの酸化チタン粉末０．２１ｇを１７モル／Ｋｇ濃度の水酸化カリウム水溶液に入れ、撹拌した後、容器を密封して乾燥機に入れ、１１０℃で２０時間静置した。２０時間経過後容器を取り出し、希塩酸で中和処理して余分なアルカリ分を除いた。その後遠心分離機を用いて得られた固形分を、イオン交換水で洗浄し、凍結乾燥機にて乾燥して、長繊維形状の酸化チタン含有物を得た。得られたものの走査型及び透過型電子顕微鏡写真を図１に示した。 After putting 0.21 g of titanium oxide powder having a particle size of 20 nm in a 17 mol / Kg potassium hydroxide aqueous solution and stirring, the vessel was sealed and placed in a dryer and allowed to stand at 110 ° C. for 20 hours. After 20 hours, the container was taken out and neutralized with dilute hydrochloric acid to remove excess alkali. Thereafter, the solid content obtained using a centrifuge was washed with ion-exchanged water and dried with a freeze dryer to obtain a long fiber-shaped titanium oxide-containing material. Scanning and transmission electron micrographs of the obtained product are shown in FIG.
１ 除湿ロータ
２ 回転ケース
３ 収容部
４ 除湿剤粉末
５ デシカント空調装置DESCRIPTION OF SYMBOLS 1 Dehumidification rotor 2 Rotating case 3 Storage part 4 Dehumidifier powder 5 Desiccant air conditioner
Claims (5)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006089351A JP3944233B2 (en) | 2005-03-04 | 2006-02-28 | Dehumidification rotor and desiccant air conditioner equipped with the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005060247 | 2005-03-04 | ||
| JP2006089351A JP3944233B2 (en) | 2005-03-04 | 2006-02-28 | Dehumidification rotor and desiccant air conditioner equipped with the same |
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| Publication Number | Publication Date |
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| JP2006272329A true JP2006272329A (en) | 2006-10-12 |
| JP3944233B2 JP3944233B2 (en) | 2007-07-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008012432A (en) * | 2006-07-05 | 2008-01-24 | Mitsubishi Paper Mills Ltd | Dispersion, sheet-like object and sheet-like object for humidity control |
| JP2008224113A (en) * | 2007-03-12 | 2008-09-25 | Tokyo Electric Power Co Inc:The | Desiccant air-conditioning system and moisture absorbing/desorbing method |
| US8286630B2 (en) | 2007-02-21 | 2012-10-16 | Itswa Co., Ltd. | Apparatus for recycling moisture exhaled from worker within dry room to the worker |
| CN104848470A (en) * | 2015-02-09 | 2015-08-19 | 钱鸿斌 | Nanometer material, manufacturing method thereof and dehumidification device and method applying nanometer material |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009195803A (en) * | 2008-02-20 | 2009-09-03 | Earth Clean Tohoku:Kk | Absorbent of volatile organic compound |
| JP6570153B1 (en) * | 2018-10-31 | 2019-09-04 | 株式会社アースクリーンテクノ | Air floating material collection material, air purification member and air purification device using the same |
-
2006
- 2006-02-28 JP JP2006089351A patent/JP3944233B2/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008012432A (en) * | 2006-07-05 | 2008-01-24 | Mitsubishi Paper Mills Ltd | Dispersion, sheet-like object and sheet-like object for humidity control |
| US8286630B2 (en) | 2007-02-21 | 2012-10-16 | Itswa Co., Ltd. | Apparatus for recycling moisture exhaled from worker within dry room to the worker |
| JP2008224113A (en) * | 2007-03-12 | 2008-09-25 | Tokyo Electric Power Co Inc:The | Desiccant air-conditioning system and moisture absorbing/desorbing method |
| CN104848470A (en) * | 2015-02-09 | 2015-08-19 | 钱鸿斌 | Nanometer material, manufacturing method thereof and dehumidification device and method applying nanometer material |
| CN104848470B (en) * | 2015-02-09 | 2018-03-13 | 钱鸿斌 | Nano material, its preparation method and apply its dehydrating unit, dehumanization method |
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| JP3944233B2 (en) | 2007-07-11 |
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