Institute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan, R.o.c

Institute of Nuclear Energy Research, Atomic Energy Council

Yi-Sin Chou

Ning-Yih Hsu

Ruey-Yi Lee

Meng-han Huang

Wen-Song Hwang

Su-Hsine Lin

Chao-Yen Kuo

Shean-du Chiou

Heng-Wei Chiang

Hwa-Yuang Tzeng

A method is provided to enhance efficiency of carbon felts in a flow battery. The carbon felts are directly immersed in a mixed acid solution. The carbon felts with the solution are heated at a low temperature and processed through sonication. On surface defects of the carbon felts, &#x2014;OH and C&#x2550;O functional groups are efficiently generated. The functional groups catalyze the redox reaction of vanadium ions. More active positions are obtained on the carbon felts through the activation treatment. Both of valence exchange and redox velocity of the vanadium ions are enhanced. Thus, the present invention has simple and fast processes with easily regulated experimental parameters for good modification without high temperature treatment but low cost.

Method of enhancing efficiency of carbon felts in flow battery through sonication

A method is provided for fabricating a catalyst carrier. At first, aluminum hydroxide is used for forming an alumina powder. The alumina powder is mixed with carbon nanotubes and a complex additive to be shaped into a cake. The cake is kneaded into a noodle-like shape to be hot-dried. Then, calcination is processed in a furnace under 1200 celsius degrees (&#xb0; C.) with air passed through. The crystal structure remains without phase change. A catalyst carrier of &#x3b1;-alumina having nano-scaled pores is formed. The catalyst carrier is a powdery material made into different three-dimensional forms. The catalyst carrier thus fabricated is suitable for generating hydrogen through methane reformation. The catalyst carrier has a methane conversion greater than 99 percents. The catalyst carrier will not be crumbled under 800&#xb0; C. for 4000 hours without carbon deposit.

Method of fabricating catalyst carrier for generating hydrogen through methane reformation

A reactor using honeycomb catalyst is provided for fuel reformation with high activity and heat stability. The reactor comprises a heating tube, a methane gas inlet, a three-way steam inlet and a hydrogen-rich gas outlet. The three-way steam inlet is near to the heating tube for providing heat required for reformation and to reduce power consumption. The heating tube is made of an inconel material so that the overall reaction may be carried out at high temperature. The heating tube is set with a honeycomb carrier of cordierite. The honeycomb carrier is pasted with carbon nanotube and heat-treated to increase internal surface area. The honeycomb carrier has a Pt/CeO/&#x3b1;-AlOcatalyst; is placed in the heating tube; and has honeycomb-pores channels parallel to a main axis of the heating tube.

Reactor with honeycomb catalyst for fuel reformation

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Taipei, Taiwan

Yi-Sin Chou