Update on Technology Development Plan for a Low Temperature Hybrid Mars Ascent Vehicle Concept

2018 ◽  
Author(s):  
Ashley C. Karp ◽  
Barry Nakazono ◽  
David A. Vaughan ◽  
George T. Story ◽  
Britt Oglesby ◽  
...  
Keyword(s):  
Low Temperature ◽  
Technology Development ◽  
Development Plan ◽  
Vehicle Concept

scholarly journals Unique structure of active platinum-bismuth site for oxidation of carbon monoxide

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Bing Nan ◽  
Qiang Fu ◽  
Jing Yu ◽  
Miao Shu ◽  
Lu-Lu Zhou ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Low Temperature ◽  
Co Oxidation ◽  
Density Functional ◽  
Technology Development ◽  
Co Adsorption ◽  
Combustion Engines ◽  
Advanced Combustion ◽  
Surface Metal ◽  
Bismuth Cluster

AbstractAs the technology development, the future advanced combustion engines must be designed to perform at a low temperature. Thus, it is a great challenge to synthesize high active and stable catalysts to resolve exhaust below 100 °C. Here, we report that bismuth as a dopant is added to form platinum-bismuth cluster on silica for CO oxidation. The highly reducible oxygen species provided by surface metal-oxide (M-O) interface could be activated by CO at low temperature (~50 °C) with a high CO2 production rate of 487 μmolCO2·gPt−1·s−1 at 110 °C. Experiment data combined with density functional calculation (DFT) results demonstrate that Pt cluster with surface Pt−O−Bi structure is the active site for CO oxidation via providing moderate CO adsorption and activating CO molecules with electron transformation between platinum atom and carbon monoxide. These findings provide a unique and general approach towards design of potential excellent performance catalysts for redox reaction.

scholarly journals ISV technology development plan for buried waste

1992 ◽  
Author(s):  
D.F. Nickelson ◽  
R.A. Callow ◽  
J.K. Luey
Keyword(s):  
Technology Development ◽  
Development Plan

Vitrification Technology Development Plan in Tokai Reprocessing Plant

2006 ◽  
Author(s):  
Atsushi Aoshima ◽  
Kazuhiko Tanaka
Keyword(s):  
Noble Metal ◽  
Technology Development ◽  
Liquid Waste ◽  
Development Plan ◽  
Stable Operation ◽  
Radioactive Liquid Waste ◽  
Basic Strategy ◽  
Long Lifetime ◽  
Reprocessing Plant ◽  
Main Electrode

The Tokai Vitrification Facility (TVF) is the only operating vitrification plant in Japan, constructed and operated by JAEA, to vitrify concentrated high radioactive liquid waste (HALW) in the Tokai Reprocessing Plant (TRP). JAEA started TVF hot operation in 1995 and produced 218 canisters as of March, 2006. An existing melter is the second melter, which was installed from 2002 to 2004 in place of the first melter stopped its operation by damage of a main electrode. JAEA has estimated that the damage was caused by accumulation of noble metal. Therefore, melter bottom structure was improved to get better drain ability of glass containing noble metal. Completing the melter replacement, vitrification operation was restarted in October 2004 and produced 88 canisters successfully until the end of March 2006. Through these experiences, JAEA made basic strategy to achieve stable TVF operation: keeping stable operation of the existing melter preventing adverse effect by noble metal accumulation and developing a new advanced melter with long lifetime preparing for future exchange as the third melter. Based on the basic strategy, JAEA made a decade development plan of necessary key technologies and has started the development since 2005.

Technology development and design of a hybrid Mars ascent vehicle concept

2016 ◽  
Author(s):  
Ashley C. Karp ◽  
Matt Redmond ◽  
Barry Nakazono ◽  
David Vaughan ◽  
Robert Shotwell ◽  
...  
Keyword(s):  
Technology Development ◽  
Vehicle Concept

Status of Future Reactor Technology Development in Korea

2010 ◽  
Author(s):  
Dohee Hahn ◽  
Yeong-Il Kim ◽  
Yong Wan Kim
Keyword(s):  
Nuclear Reactor ◽  
Technology Development ◽  
Atomic Energy Commission ◽  
Development Plan ◽  
Reactor Technology ◽  
Very High Temperature Reactor ◽  
Demonstration Plant ◽  
High Temperature Reactor ◽  
Consistent Direction

In order to provide a consistent direction to long-term R&D activities, the Korea Atomic Energy Commission (KAEC) approved a long-term development plan for future nuclear reactor systems which include sodium cooled fast reactor (SFR) and very high temperature reactor (VHTR) on December 22, 2008. The SFR system is regarded as a promising technology to perform actinide management. The final goal of the long-term SFR development plan is the construction of an advanced SFR demonstration plant by 2028. The nuclear hydrogen project in Korea aims at designing and constructing a nuclear hydrogen demonstration system by 2022 to demonstrate its hydrogen production capability. This paper summarizes the overall long-term project plans for SFR and VHTR technology development and explains results of detailed design studies with supporting R&D activities.

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