Results 171 to 180 of about 303,477 (208)

Shock-tube study of the ignition of multi-component syngas mixtures with and without ammonia impurities

Proceedings of the Combustion Institute, 2013
Abstract Ignition delay times have been measured behind reflected shock waves at 1.5, 12 and 30 atm for a mixture representative of a syngas produced from biomass (0.29659% CO/0.29659% H 2 /0.15748% CO 2 /0.08924% CH 4 /0.20997% H 2 O/0.95013% O 2 in 98% Ar (mol.%)) and for the same biomass-derived syngas mixture doped with 200 ppm of NH 3 .
O. Mathieu, M. Kopp, E. Petersen
semanticscholar   +2 more sources

A Degradation Model for Solid Oxide Fuel Cell Anodes Due to Impurities in Coal Syngas: Part II Estimation of Tolerance Limits

Fuel Cells, 2016
AbstractAn engineering analysis based on calibrated numerical predictions was performed to estimate the minimum allowable impurity concentrations in coal syngas intended to be used in Solid Oxide Fuel Cells (SOFCs) operating for over 10,000 h. Arsine and phosphine, impurities that are known to have the most deleterious effects on the cell performance ...
F. N. Çayan, H. Sezer, I. Celik
semanticscholar   +2 more sources

Syngas fermentation to biofuels: Effects of ammonia impurity in raw syngas on hydrogenase activity

Biomass and Bioenergy, 2012
Abstract Hydrogenase activity plays an important role in the fermentation of biomass-generated syngas (containing CO, CO 2 , and H 2 ) to obtain ethanol and other biofuels. One process efficiency issue for producing biofuels from syngas fermentation is the ability of key cellular enzymes to produce reducing equivalents from syngas. For microbes using
Deshun Xu, Randy S. Lewis
openaire   +1 more source

The Effect of Impurities on Ignition Delay Times and Laminar Flame Speeds of Syngas Mixtures at Gas Turbine Conditions

Volume 4A: Combustion, Fuels and Emissions, 2014
In addition to mostly H2 and CO, syngas also contains reasonable amounts of light hydrocarbons, CO2, H2O, N2, and Ar. Impurities such as NH3, HCN, COS, H2S, and NOx (NO, NO2, N2O) are also commonly found in syngas. The presence of these impurities, even in very low concentrations, can induce some large changes in combustion properties.
O. Mathieu, Joshua W. Hargis, E. Petersen, J. Bugler, H. Curran, F. Güthe   +5 more
semanticscholar   +2 more sources

Chemical Degradation Behavior of SOFC Anode Due to Trace Impurities Contained in a Coal Derived Syngas

ECS Transactions, 2012
In an effort to explore the feasibility of coal-syngas use as a fuel for solid oxide fuel cell (SOFC), we need to clarify the anode degradation behavior due to the interaction between trace chemical impurities and SOFC anode and electrolyte. We conducted the power generation tests using electrolyte-supported button cells with Ni-YSZ anode fueled by ...
K. Kuramoto, T. Fukushima, K. Matsuoka, Yoshizo Suzuki, H. Kishimoto, K. Yamaji, T. Horita, M. E. Brito, H. Yokokawa   +8 more
semanticscholar   +2 more sources

Study of the Effect of Surface Modification and Sulfur Impurities in Syngas on the Fischer-Tropsch Performance of Cobalt Catalysts

, 2012
Ashish S. Bambal
semanticscholar   +3 more sources

Effect of Alkali Metal Impurities on Co–Re Catalysts for Fischer–Tropsch Synthesis from Biomass-Derived Syngas

Catalysis Letters, 2010
The effect of alkali impurities on Co-based Fischer–Tropsch (FT) catalysts is important for processing biomass-derived synthesis gas containing inorganic ash impurities. The effects of Na, K, Li, and Ca impurities on γ-Al2O3-supported Co–Re powder catalysts were studied at impurity loadings between 25 and 1,000 ppm.
C. Balonek, A. Lillebø, Shreyas Rane, E. Rytter, L. Schmidt, A. Holmen   +5 more
semanticscholar   +2 more sources

A Degradation Model for Degradation of Solid Oxide Fuel Cell Anodes due to Impurities in Coal Syngas

ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology, 2011
A new phenomenological one-dimensional model is formulated to simulate the typical degradation patterns observed in Solid Oxide Fuel Cell (SOFC) anodes due to coal syngas contaminants such as arsenic (As) and phosphorous (P). The model includes gas phase diffusion and surface diffusion within the anode and the adsorption reactions on the surface of the
F. N. Çayan, S. R. Pakalapati, I. Celik
semanticscholar   +2 more sources

CO x Fixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis

Chemie Ingenieur Technik, 2022
Heterogeneous catalysis and anaerobic syngas fermentation represent two different approaches for the conversion of synthesis gas into chemicals and fuels.
Lukas Perret, Bruno Lacerda de Oliveira Campos, Karla Herrera Delgado, T. Zevaco, A. Neumann, J. Sauer   +5 more
semanticscholar   +1 more source

A Degradation Model for Solid Oxide Fuel Cell Anodes due to Impurities in Coal Syngas: Part I Theory and Validation

Fuel Cells, 2012
AbstractA new phenomenological one‐dimensional model is formulated to simulate the typical degradation patterns observed in solid oxide fuel cell (SOFC) anodes due to coal syngas contaminants such as arsenic (As) and phosphorous (P). The model includes gas phase diffusion and surface diffusion within the anode and the adsorption reactions on the ...
F. N. Çayan, S. R. Pakalapati, I. Celik, C. Xu, J. Zondlo   +4 more
semanticscholar   +2 more sources