Investigation of Carbon Buildup in Simulations of Multi-Impact Bombardment of Si with 20 keV C60 Projectiles

2014 ◽  
Vol 118 (37) ◽  
pp. 8081-8087 ◽  
Author(s):  
Kristin D. Krantzman ◽  
Clarissa A. Briner ◽  
Barbara J. Garrison
Keyword(s):  
Carbon Buildup

Durability Testing of Biomass Based Oxygenated Fuel Components in a Compression Ignition Engine

2017 ◽  
Author(s):  
Marc E. Baumgardner ◽  
Arunachalam Lakshminarayanan ◽  
Daniel B. Olsen ◽  
Matthew A. Ratcliff ◽  
Robert L. McCormick ◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Fuel Injection ◽  
Engine Performance ◽  
Engine Oil ◽  
Long Term Effects ◽  
Compression Ignition Engine ◽  
Engine Operation ◽  
Minimal Impact ◽  
Carbon Buildup ◽  
The Impact

Blending cellulosic biofuels with traditional petroleum-derived fuels results in transportation fuels with reduced carbon footprints. Many cellulosic fuels rely on processing methods that produce mixtures of oxygenates which must be upgraded before blending with traditional fuels. Complete oxygenate removal is energy-intensive and it is likely that such biofuel blends will necessarily contain some oxygen content to be economically viable. Previous work by our group indicated that diesel fuel blends with low levels (<4%-vol) of oxygenates resulted in minimal negative effects on short-term engine performance and emissions. However, little is known about the long-term effects of these compounds on engine durability issues such as the impact on fuel injection, in-cylinder carbon buildup, and engine oil degradation. In this study, four of the oxygenated components previously tested were blended at 4%-vol in diesel fuel and tested with a durability protocol devised for this work consisting of 200 hrs of testing in a stationary, single-cylinder, Yanmar diesel engine operating at constant load. Oil samples, injector spray patterns, and carbon buildup from the injector and cylinder surfaces were analyzed. It was found that, at the levels tested, these fuels had minimal impact on the overall engine operation, which is consistent with our previous findings.

scholarly journals Current Carbon Emissions Unprecedented in 66 Million Years

Eos ◽  
2016 ◽  
Vol 97 ◽  
Author(s):  
JoAnna Wendel
Keyword(s):  
Carbon Dioxide ◽  
Carbon Emissions ◽  
Carbon Buildup ◽  
Carbon Dioxide Release ◽  
Atmospheric Carbon

An ancient carbon dioxide release associated with a much hotter Earth than today took place at only a tenth the pace of our present atmospheric carbon buildup, a new study confirms.

scholarly journals Fabrication and Characterization of Thin-Film SOFC Supported by Microchannel-Structured Zirconia Substrate for Direct Methane Operation

2021 ◽  
Vol 8 ◽  
pp. 80-92
Author(s):  
Myongjin Lee ◽  
Yun Gan ◽  
Chunyang Yang ◽  
Chunlei Ren ◽  
Xingjian Xue
Keyword(s):  
Carbon Deposition ◽  
Catalytic Properties ◽  
Current Collector ◽  
Oxygen Storage ◽  
Short Term ◽  
Functional Layer ◽  
Carbon Buildup ◽  
Anode Electrode ◽  
Solid Oxide Cell

Ni-cermet anode demonstrates excellent catalytic activity and electrical conductivity but suffers from carbon deposition issue. To utilize Ni-cermet anode while preventing carbon deposition, a synergic strategy is employed to design anode electrode. In particular, Zr is incorporated into Ce0.8Sm0.2O2-δ lattice to tailor oxygen storage and catalytic properties of Ni-Ce0.8-xSm0.2ZrxO2-δ anode for improving electrochemical oxidizations of various fuel species. An inert thick YSZ microtubular substrate with radially well-aligned microchannels open at the inner surface is used to support multi thin functional layers of solid oxide cell, i.e., Ni current collector, Ni-Ce0.8-xSm0.2ZrxO2-δ anode, YSZ/SDC electrolyte, and LSCF cathode. The thick YSZ substrate is able to inhibit the ratio of fuel to product gases in the thin anode functional layer, which favors the prevention of carbon buildup in the thin anode layer when synergistically combined with Ni-Ce0.8-xSm0.2ZrxO2-δ anode material. The microchannels embedded in the YSZ substrate can also avoid too much dilutions of the fuel in the anode functional layer. The cell is fabricated and tested with both hydrogen and methane as the fuel. A short-term test is conducted with methane as fuel and good stability is obtained. The fundamental mechanisms for the prevention of carbon buildup in anode functional layer are also discussed.

Carbon buildup by ion-induced polymerization under 100–400 keV H, He and Li bombardment

1981 ◽  
Vol 182-183 ◽  
pp. 297-302 ◽  
Author(s):  
W. Möller ◽  
Th. Pfeiffer ◽  
M. Schluckebier
Keyword(s):  
Carbon Buildup

Carbon buildup monitoring using RBS: Correlation with secondary electrons

2006 ◽  
Vol 244 (2) ◽  
pp. 427-435 ◽  
Author(s):  
E.F. Aguilera ◽  
P. Rosales ◽  
E. Martinez-Quiroz ◽  
G. Murillo ◽  
M.C. Fernández
Keyword(s):  
Secondary Electrons ◽  
Carbon Buildup

Suppression of carbon buildup and lifetime improvement by heating carbon stripper foils

2011 ◽  
Vol 269 (3) ◽  
pp. 223-228 ◽  
Author(s):  
I. Sugai ◽  
M. Oyaizu ◽  
Y. Takeda ◽  
H. Kawakami ◽  
T. Hattori ◽  
...  
Keyword(s):  
Carbon Buildup ◽  
Carbon Stripper Foils

Lifetime improvement of slackened thin cluster carbon stripper foils by suppression of carbon buildup

2008 ◽  
Vol 590 (1-3) ◽  
pp. 32-36 ◽  
Author(s):  
I. Sugai ◽  
M. Oyaizu ◽  
Y. Takeda ◽  
H. Kawakami ◽  
T. Hattori ◽  
...  
Keyword(s):  
Carbon Buildup ◽  
Carbon Stripper Foils

Carbon buildup and PHD effect under ion bombardment

2010 ◽  
Author(s):  
E Martinez-Quiroz ◽  
E F Aguilera ◽  
F J Ramirez-Jimenez ◽  
M C Fernandez ◽  
G Murillo
Keyword(s):  
Ion Bombardment ◽  
Carbon Buildup
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