Influence of Coal Properties on Emissions of Nitrous Oxides and Nitric Oxides

De-Chang Liu; Bo-Xiong Shen; Bo Feng; Zhi-Jie Lin; Ji-Dong Lu

doi:10.1021/ef990016e

Dielectrics on Silicon Thermally Grown or Annealed in a Nitrogen Rich Environment

MRS Proceedings ◽

10.1557/proc-342-151 ◽

1994 ◽

Vol 342 ◽

Cited By ~ 8

Author(s):

H. Barry Harrison ◽

Andrew Misiura ◽

Sima Dimitrijev ◽

Denis Sweatman ◽

Z. Yao ◽

...

Keyword(s):

Nitric Oxide ◽

Nitric Oxides ◽

Nitrous Oxides ◽

20 Nm ◽

Thin Dielectrics ◽

Thermally Grown

ABSTRACTIn this paper we review various methods of improving the properties of extremely thin dielectrics (<20 nm) using a nitrogen rich environment. The three main gases considered being ammonia, and nitrous and nitric oxides. We present original results for nitric oxide exposed silicon and suggest that for ultra thin dielectric (<5 nm) that these layers are generally superior to any others, whilst for thicker layers oxides annealed in nitrous oxides appear to display the best properties.

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The Relative Importance of Char and Volatile Nitrogen on Formation of Nitrous Oxides and Nitric Oxides

Energy & Fuels ◽

10.1021/ef990035o ◽

1999 ◽

Vol 13 (6) ◽

pp. 1252-1254 ◽

Cited By ~ 5

Author(s):

De-Chang Liu ◽

Zheng-Shun Wu ◽

Bo-xiong Shen ◽

Bo Feng ◽

Zhi-Jie Lin

Keyword(s):

Relative Importance ◽

Nitric Oxides ◽

Nitrous Oxides

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estimate of dewatering time on vertical coalbed methane well as function of reservoir and coal properties using an artificial neural network

10.29118/ipa.46.14.se.037 ◽

2018 ◽

Author(s):

Priska Andini

Keyword(s):

Neural Network ◽

Artificial Neural Network ◽

Coalbed Methane ◽

Coal Properties ◽

Artificial Neural

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The structure directing agent isomer used in SSZ-39 synthesis impacts the zeolite activity towards selective catalytic reduction of nitric oxides

Journal of Catalysis ◽

10.1016/j.jcat.2019.12.038 ◽

2020 ◽

Vol 382 ◽

pp. 339-346 ◽

Cited By ~ 1

Author(s):

Ross Ransom ◽

Roger Moulton ◽

Daniel F. Shantz

Keyword(s):

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Nitric Oxides ◽

Structure Directing Agent

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A phenomenological model for the description of unburned hydrocarbons emission in ultra-lean engines

International Journal of Engine Research ◽

10.1177/14680874211005063 ◽

2021 ◽

pp. 146808742110050

Author(s):

Enrica Malfi ◽

Vincenzo De Bellis ◽

Fabio Bozza ◽

Alberto Cafari ◽

Gennaro Caputo ◽

...

Keyword(s):

Natural Gas ◽

Internal Combustion Engines ◽

Pollutant Emissions ◽

Average Error ◽

Combustion Engines ◽

Nitric Oxides ◽

Lean Burn ◽

Fuel Charge ◽

Unburned Hydrocarbons ◽

Model Reliability

The adoption of lean-burn concepts for internal combustion engines working with a homogenous air/fuel charge is under development as a path to simultaneously improve thermal efficiency, fuel consumption, nitric oxides, and carbon monoxide emissions. This technology may lead to a relevant emission of unburned hydrocarbons (uHC) compared to a stoichiometric engine. The uHC sources are various and the relative importance varies according to fuel characteristics, engine operating point, and some geometrical details of the combustion chamber. This concern becomes even more relevant in the case of engines supplied with natural gas since the methane has a global warming potential much greater than the other major pollutant emissions. In this work, a simulation model describing the main mechanisms for uHC formation is proposed. The model describes uHC production from crevices and flame wall quenching, also considering the post-oxidation. The uHC model is implemented in commercial software (GT-Power) under the form of “user routine”. It is validated with reference to two large bore engines, whose bores are 31 and 46 cm (engines named accordingly W31 and W46). Both engines are fueled with natural gas and operated with lean mixtures (λ > 2), but with different ignition modalities (pre-chamber device or dual fuel mode). The engines under study are preliminarily schematized in the 1D simulation tool. The consistency of 1D engine schematizations is verified against the experimental data of BMEP, air flow rate, and turbocharger rotational speed over a load sweep. Then, the uHC model is validated against the engine-out measurements. The averaged uHC predictions highlight an average error of 7% and 10 % for W31 and W46 engines, respectively. The uHC model reliability is evidenced by the lack of need for a case-dependent adjustment of its tuning constants, also in presence of relevant variations of both engine load and ring pack design.

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