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P-1003 : Novel Catalyst for Hydrogen Generation from Sodium Borohydride Solution
( Palanichamy Krishnan ),양태현,박구곤,이원용,김창수 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.2
A novel catalyst for hydrogen generation from sodium borohydride solution was investigated. The hydrolysis of NaBH4 has been attracted because of the large hydrogen content of 10.9 wt.%. The special catalyst was necessary to produce hydrogen from NaBH4 solution. For this purpose, the catalysts such as Pt, Ru, PtRu supported on LiCoO2 and anion exchange resin were fabricated. The effects of support material, NaBH4 concentration, catalyst loading were discussed. References [1]S.C. Amendola, S.L. Sharp-Goldman, M.S. Janjua, M.T. Kelly, P.J. Petillo, M. Binder, An ultrasafe hydrogen generator: aqueous, alkaline borohydride solutions and Ru catalyst, J. Power Sources, 85 (2000) 186-189 [2]Yoshitsugu Kojima, Ken-ichirou Suzuki, Kazuhiro Fukumoto, Yasuaki Kawai,Masahiko Kimbara, Haruyuki Nakanishi, Shinichi Matsumoto, Development of 10kW-scale hydrogen generator using chemical hydride, J. Power Sources, 125 (2004)22-26
양태현(Yang, Tae-Hyun),이원용(Krishnan, Palanichamy),김창수(Lee, Won-Yong),Kim, Chang-Soo 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
Hydrogen generation by the hydrolysis of aqueous sodium borohydride (NaBH₄) solutions was studied using IRA-400 anion resin dispersed Pt. Ru catalysts and Lithium Cobalt oxide (LiCoO₂) supported Pt, Ru and PtRu catalysts. The performance of the LiCoO₂ supported catalysts is better than the ion exchange resin dispersed catalysts. There is a marked concentration dependence on the performance of the LiCoO₂ supported catalysts and the hydrogen generation rate goes down if the borohydride concentration is increased beyond 10%. The efficiency of PtRu- LiCoO₂ is almost double that of either Ru-LiCoO₂ or Pt-LiCoO₂ for NaBH₄ concentrations up to 10%.
Senthilkumar Vellur,Parasuraman Pavadai,Sureshbabu Ram Kumar Pandian,Chandrasekar Palanichamy,Shanmugampillai Jeyarajaguru Kabilan,Krishnan Sundar,Suthendran Kannan,Selvaraj Kunjiappan 한국식품과학회 2024 Food Science and Biotechnology Vol.33 No.2
This study was designed to optimize the ultrasound-assisted extraction (UAE) of bioactive chemicals from Hemidesmus indicus (L.) R.Br. through RSM (response surface methodology) and ANFIS (adaptive neuro-fuzzy inference system). The effect of four independent parameters, methanol concentration (X1: 55–65%), temperature (X2: 30–40 °C), time (X3: 15–20 min) and particle size (X4: 0.5–1.00 mm) at five levels (− 2 ,− 1, 0, + 1, + 2) with respect to dependent parameters, total polyphenols content (TP) (y1), total flavonoids content (TF) (y2), %DPPHsc (y3), %ABTSsc (y4) and %H2O2sc (y5) were selected. The optimal extraction condition was observed at X1 = 65%, X2 = 40 °C, X3 = 20 min and X4 = 0.5 mm; under this circumstance, y1 = 352.85 mg gallic acid equivalents (GA)/g, y2 = 300.204 mg rutin equivalents (RU)/g and their antioxidant potentials (y3 = 81.33%, y4 = 65.04%, and y5 = 71.01%) has been attained. ANFIS was used to compare and confirm the optimized extraction parameter values. Further, GC–MS and LC–MS were performed to investigate the bioactive chemicals present in the optimized extract.