Faculty Profiles - NAGAOKA Katsutoshi

MISC - NAGAOKA Katsutoshi

Division display 181 - 200 of about 311 ／ All the affair displays >>

Mechanism of Promotion Effects of Ce added to AlPO4 Effective for CFC Decomposition Reviewed

Takeshi Takubo, Daigo Sato, Yasutaka Inao, Hiroyasu Nishiguchi, Katsutoshi Nagaoka, Yusaku Takita

KAGAKU KOGAKU RONBUNSHU Vol. 35 ( 6 ) page： 623-632 2009.11

Language：Japanese

AlPO4 which was prepared by neutralization of an aqueous solution of Al nitrate was amorphous and has a large specific surface area as much as 130m(2)/g after calcination at 1000 degrees C. After the calcination at 1100 degrees C, AlPO4 was slightly crystallized and the crystallite size of AlPO4 was about 16 nm and the catalytic activity was higher than that calcined at 1000 degrees C. But AlPO4 calcined at 1200 degrees C was more crystallized and the activity was decreased. On one hand, AlPO4 promoted by 10 mol% of Ce which was calcined at 1000 degrees C showed a maximum catalytic activity and crystallinity was the same as that of pure AlPO4 calcined at 1100 degrees C. Ce promoted AlPO4 after calcination at 1100 degrees C was well crystallized, and the catalytic activity was decreased.
Therefore, it was concluded that Ce as a promoter, creates small AlPO4 particles which was conveniently crystallized to CCl2F2 decomposition by the calcination at 1000 degrees C which is 100 degrees C lower than that in case of pure AlPO4.
By treatment with concentrated CCl2F2 at high temperatures such as 800 or 900 degrees C for 8 h, both AlPO4 and Ce promoted catalysts were much crystallized and SSA and the catalytic activity of the catalysts were decreased. The catalytic activity when it will be ultimately inactivated state was estimated using T-50% approached at zero SSA, and 550 degrees C will be required to obtain 100% CCl2F2 conversion for Ce promoted AlPO4 catalyst.
AlPO4 was crystallized by a steam treatment at 900 degrees C to the same level of that calcined at 1100 degrees C in air and increased the catalytic activity. In case of Ce promoted AlPO4, steam treatment at 1000 degrees C promoted the crystallization of CePO4 but AlPO4 and increased the catalytic activity.
The effects of CCl4, CF4, and CCl2F2 treatment were studied and found that AlPO4 was the most crystallized by the treatment by CCl2F2. This may be explained by the formation of chloridefluorides such as AlCl3-nFn and PCl5-mFm which can be sublimated only in the decomposition of CCl2F2.

DOI： 10.1252/kakoronbunshu.35.623

Research data storage URL： http://orcid.org/0000-0003-1774-1537

Web of Science

Scopus

n‐C4H10の酸化的改質反応の常温駆動(7)CeO2とZrO2の複合化効果

佐藤勝俊, 福田渉, 足立康平, 永岡勝俊, 西口宏泰, 瀧田祐作

石油・石油化学討論会講演要旨 Vol. 39th page： 82 - 83 2009.10

プロパンの水蒸気改質反応用Ni/γ‐Al2O3へのLa2O3添加効果の検討

葛城雅子, 佐藤勝俊, 中山真衣子, 岡田治, 西口宏泰, 永岡勝俊, 滝田祐作

石油・石油化学討論会講演要旨 Vol. 39th page： 80 2009.10

Na2Ti3O7を用いた植物油からのBDF合成用固体触媒と装置の開発

石田寛, 西口宏泰, 永岡勝俊, 瀧田祐作

触媒討論会討論会A予稿集 Vol. 104th page： 67 2009.9

n‐C4H10の酸化的改質反応の常温駆動(6)―ペロブスカイト型酸化物担持Rh触媒―

足立康平, 宮崎達郎, 道明良幸, 永岡勝俊, 西口宏泰, 瀧田祐作

触媒討論会討論会A予稿集 Vol. 104th page： 233 2009.9

アンモニア改質による水素製造反応用担持Ru触媒での担体効果

本多恭子, 伊吹恵美, 葛城雅子, 河野まなみ, 佐藤勝俊, 永岡勝俊, 西口宏泰, 瀧田祐作

触媒討論会討論会A予稿集 Vol. 104th page： 180 2009.9

フロン分解用AlPO4の結晶構造と活性低下機構

稲尾恭敬, 佐藤大悟, 西口宏泰, 永岡勝俊, 滝田祐作

触媒討論会討論会A予稿集 Vol. 104th page： 472 2009.9

プロパンの水蒸気改質反応用Ni/γ‐Al2O3へのLa2O3の添加効果

葛城雅子, 佐藤勝俊, 岡田治, 永岡勝俊, 西口宏泰, 瀧田祐作

化学関連支部合同九州大会・外国人研究者交流国際シンポジウム講演予稿集 Vol. 46th page： 77 2009.7

Start-up mechanism of Ni/CeO2 and Ni/CePO4 under DSS like operation in methane steam reforming.

平山武, 安達健二, 阿部陽介, 永岡勝俊, 西口宏泰, 滝田祐作

日本化学会講演予稿集 Vol. 89th ( 1 ) page： 532 2009.3

Development of catalysts effective for oxyhydration of olefins

河村智志, 西口宏泰, 永岡勝俊, 滝田祐作

日本化学会講演予稿集 Vol. 89th ( 1 ) page： 534 2009.3

Oxidative reforming of n-C4H10 triggered repeatedly by oxidation of Rh/CexZr1-xO2 at ambient temperature

佐藤勝俊, 福田渉, 足立康平, 永岡勝俊, 西口宏泰, 瀧田祐作

触媒 Vol. 51 ( 2 ) page： 141 - 143 2009.3

Oxidative reforming of n-C_4H_<10> triggered repeatedly by oxidation of Rh/Ce_xZr_<1-x>O_2 at ambient temperature

SATO Katsutoshi, FUKUDA Sho, ADACHI Kouhei, NAGAOKA Katsutoshi, NISHIGUCHI Hiroyasu, TAKITA Yusaku

觸媒 = Catalyst Vol. 51 ( 2 ) page： 141 - 143 2009.3

Oxidative reforming of n-C4H10 triggered from ambient temperature (part 7) Combination effect of CeO2 and ZrO2

Sato Katsutoshi, Fukuda Sho, Adachi Kouhei, Nagaoka Katsutoshi, Nishiguchi Hiroyasu, Takita Yusaku

Proceeding of Annual/Fall Meetings of the Japan Petroleum Institute Vol. 2009 ( 0 ) page： 49 - 49 2009

Language：Japanese Publisher：The Japan Petroleum Institute

Rh/CeO2は、873 K以上で還元処理することで、反応ガス中のO2によって酸化される際の発熱を利用することにより、n-ブタンの酸化的改質反応を常温かつ無加熱で駆動出来るようになる。また、CeO2に25 mol%のZrO2を複合化させることで、この還元温度は473 Kまで劇的に低下する。今回はCe/Zrの比が触媒の特性に与える影響について検討した。Ce/Zr比が低下するにつれ、触媒の還元性及び還元後のO2吸収量が向上することが明らかとなった。

DOI： 10.11523/sekiyu.2009f.0.49.0

researchmap

Addition of La2O3 to supported Ni catalysts in steam reforming of propane

Katsuragi Masako, Sato Katsutoshi, Nakayama Maiko, Okada Osamu, Nishiguchi Hiroyasu, Nagaoka Katsutoshi, Takita Yusaku

Proceeding of Annual/Fall Meetings of the Japan Petroleum Institute Vol. 2009 ( 0 ) page： 47 - 47 2009

Language：Japanese Publisher：The Japan Petroleum Institute

プロパンの水蒸気改質反応用Ni/γ-Al2O3での活性に対する空間速度の影響を検討した。その結果、低空間速度では転化率が100%と安定していたが、高空間速度では転化率の低下と反応管内の圧力上昇が見られ、炭素析出により反応管が閉塞した。一方、La2O3添加触媒では高空間速度で反応を行っても反応管の閉塞は見られなかった。現在、La2O3の添加量が活性と炭素析出に及ぼす影響について検討しており、合わせて報告する。

DOI： 10.11523/sekiyu.2009f.0.47.0

researchmap

高温還元したRh/CeO2の自発的酸化によるn-ブタンの酸化的改質反応の常温駆動

佐藤勝俊, 福田渉, 中鋪勝太, 永岡勝俊, 西口宏泰, 瀧田祐作

水素エネルギーシステム Vol. 33 page： 44-48 2008.12

SDSを用いた炭酸カルシウム‐硫酸カルシウム複合体ナノチューブの合成

谷田紗貴, 杉原久夫, 永岡勝俊, 瀧田祐作

無機マテリアル学会学術講演会講演要旨集 Vol. 117th page： 70 - 71 2008.11