Mass transport enhancement in a proton exchange membrane fuel cell
Mass transport enhancement in a proton exchange membrane fuel cell
... water and proton transport in catalyst layer and membrane, as well as electrical current transport in the bipolar plate The generalized Stefan-Maxwell equation is used to model the water and proton ... channels (parallel, serpentine, inter-digitated and etc) are machined in graphite plates to feed the reactant gases to the GDL Optimum flow channel area can be determined, as in...
Ngày tải lên: 14/09/2015, 08:36
Development a new equation of polarization curve for a proton exchange membrane fuel cell at different channel geometry
... reaction at the surface of catalyst layers ● A new correlation for predicting the polarization curve of a PEM fuel cell according to cell temperature and the parameter of cross-section channel geometry ... (7) that in this equation current density is in A/ cm2, temperatures are in ºC and Z=1 for elliptical channel and Z=2 for triangular channel and Z=3...
Ngày tải lên: 09/09/2015, 10:32
A CFD analysis of transport phenomena and electrochemical reactions in a tubular-shaped PEM fuel cell
... used to analyse and evaluate the performance of a planar and a tubular-shaped PEM fuel cell 2.1 Computational domain The full computational domains for the planar and tubular-shaped PEM fuel cell ... conditions are specified at all external boundaries of the computational domain as well as boundaries for various mass and scalar equations inside the computationa...
Ngày tải lên: 05/09/2013, 14:58
Integrated platinum carbon nanotube based electrocatalyst for high efficiency proton exchange membrane fuel cells 1
... Suitable for all sizes of power stations, kW to multi-MW Table 1. 1 Main types of fuel cells and their characteristics and applications 1. 3 Proton Exchange Membrane Fuel Cells (PEMFCs) Proton Exchange ... 1- 1 to 1- 3 [2]: Anode: H2 2H+ + 2e- Cathode: 2H+ + 2e- + 1/ 2O2 Overall: H2 + 1/ 2O2 (1- 1) H2O H2O + electricity + heat (1- 2) (1- 3) According to Eq 1- 3, t...
Ngày tải lên: 11/09/2015, 10:02
Integrated platinum carbon nanotube based electrocatalyst for high efficiency proton exchange membrane fuel cells 2
... most accurate and realistic information of the Pt/CNT -based electrocatalyst as a potential substitute for conventional Pt/VXC72Rbased electrocatalysts used for high- efficiency PEMFC applications ... VCXC72R Carbon paper TGPH090 Toray Carbon black (CB) VCXC72R Cabot Commercial Pt catalyst 40wt% Pt/VCXC72R Johnson Matthey Commercial Pt catalyst 20 wt% Pt/VCXC72R E-TEK Nafion m...
Ngày tải lên: 11/09/2015, 10:03
Integrated platinum carbon nanotube based electrocatalyst for high efficiency proton exchange membrane fuel cells 3
... (6vol%) and silane (1vol%) solution containing 0 .3 M Ni(NO3)2 and 0 .3 M Co(NO3)2 for h During the CNT growth, the carbon paper was heated at 600 °C for at 35 0 sccm Ar and 1.5 sccm H2 flow to obtain ... well as the carbon graphitization (see Fig 3. 2 (a)) On the other hand, at a high growth temperature of 800 °C, thermal pyrolysis of C2H4 would take place to form amorphous ca...
Ngày tải lên: 11/09/2015, 10:03
Integrated platinum carbon nanotube based electrocatalyst for high efficiency proton exchange membrane fuel cells 4
... studies [13-17] 20000 4f7/2, 71.1 eV 4f5/2, 74. 4 eV 16000 CPS 12000 8000 40 00 84 82 80 78 76 74 72 70 68 66 64 Binding energy / eV Fig 4. 4 XPS spectrum of Pt nanoparticles on CNT /carbon paper by sputter-deposition ... sccm C2H4) 0.8 Pt/CNT -based cathode (15 sccm C2H4) Cell potential / V Pt/CNT -based cathode (20 sccm C2H4) Pt/CNT -based cathode (25 sccm C2H4) 0.6 -2 Pt loading:...
Ngày tải lên: 11/09/2015, 10:03
Integrated platinum carbon nanotube based electrocatalyst for high efficiency proton exchange membrane fuel cells 5
... The longterm stability information of Pt/CNT -based electrocatalysts from a fuel cell under real operating conditions would be very useful for the full evaluation of these electrocatalysts in terms ... wt% Pt/VXC72Rbased electrodes at 1 .5 V vs DHE 141 120 (a) Before potentiostatic oxidation After 30min oxidation at 1.5V After 60min oxidation at 1.5V After 90min oxidation at 1.5V A...
Ngày tải lên: 11/09/2015, 10:03
Integrated platinum carbon nanotube based electrocatalyst for high efficiency proton exchange membrane fuel cells 6
... cm-1 This technique is thus more suitable for fabricating low Pt loading electrode with high Pt utilization for PEMFC applications 6. 2 Recommendations for Future Research The in situ grown CNT ... tests were performed in a single cell test system When compared with two commercial Pt/VXC72R -based electrodes, the Pt/CNT -based electrode showed a notable improvement in polarization...
Ngày tải lên: 11/09/2015, 10:03
Development of reduced models for proton exchange membrane fuel cells
... now 1.2 Types of Fuel Cells There are six types of fuel cells that are currently in commercial use, di¤erentiated according to the type of electrolyte: Proton Exchange Membrane Fuel Cell (PEMFC), ... Methanol Fuel Cell (DMFC), Alkaline Fuel Cell (AFC), 1.2 Types of Fuel Cells Phosphoric Acid Fuel Cell (PAFC), Molten Carbonate Fuel Cell (MCFC), Solid Oxide...
Ngày tải lên: 30/09/2015, 06:29
Báo cáo khoa học: Disruption of transport activity in a D93H mutant thiamine transporter 1, from a Rogers Syndrome family pdf
... membrane targeting and thiamine transport activity In a recent paper, we described the molecular consequences of a single aminoacid substitution identified in an Italian Rogers syndrome family harboring ... patients carrying this D93H mutant protein which apparently lost thiamine transport activity Aspartate 93 is conserved in all members of the solute carri...
Ngày tải lên: 30/03/2014, 20:20
Báo cáo Y học: Balanced expression of single subunits in a multisubunit protein, achieved by cell fusion of individual transfectants docx
... The amount of IgA present in each supernatant was calculated relative to a standard preparation with known concentration Verification of J-chain expression To examine production of J-chain, transfected ... density was analysed by TOTALLAB gel software (Phonetix, UK) The amount of SC present in each supernatant was calculated relative to a standard preparation with known con...
Ngày tải lên: 18/03/2014, 01:20
Báo cáo khoa học: "Abscess formation mimicking disease progression, in a patient with metastatic renal cell carcinoma during sunitinib treatment" docx
... patients with advanced renal cell carcinoma [3,4] Sunitinib malate is an oral multi-kinase inhibitor targeting several receptor tyrosine kinases (PDGFRalpha and PDGFRbeta; VEGFR1, VEGFR2 and VEGFR3; ... laparotomy In summary, a case of an intra-abdominal abscess formation mimicking disease progression during sunitinib treatment, was presented After an uneventful postop...
Ngày tải lên: 09/08/2014, 03:21
Báo cáo y học: " Paraneoplastic limbic encephalitis as a cause of new onset of seizures in a patient with non-small cell lung carcinoma: a case report" potx
... Conclusion Paraneoplastic limbic encephalitis is a possible cause of seizures in patients with lung cancer New onset of paraneoplastic limbic encephalitis in patients with already diagnosed lung cancer ... treating such patients We report a case of paraneoplastic limbic encephalitis (PLE) which is a rather rare cause of seizures in p...
Ngày tải lên: 11/08/2014, 21:22
Báo cáo khoa học: " Challenging complications of treatment – human herpes virus 6 encephalitis and pneumonitis in a patient undergoing autologous stem cell transplantation for relapsed Hodgkin''''s disease: a case report" doc
... Bronchoalveolar lavage was positive for HHV6b too and negative for Adenovirus, Influenza, Parainfluenza, Respiratory syncytial virus and Legionella pneumophilia Immediate treatment with foscarnet and ... Kanda Y, Taguchi J, Akiyama H, Kanamori H, Maruta A, Okamoto S, Sakamaki H: Human herpesvirus meningoencephalitis in allogeneic hematopoietic stem cell transplant recip...
Ngày tải lên: 12/08/2014, 04:21