Concept

Liquefaction of gases

Publications associées (21)

On the Efficiency, Exergy Costs and CO2 Emission Cost Allocation for an Integrated Syngas and Ammonia Production Plant

This paper presents an exergy and environmental assessment of a 1000 metric t/day ammonia production plant based on the steam methane reforming (SMR) process, including the syngas production, purification (CO2 capture) and compression units, as well as the ...

2015

Acid-Catalyzed Chitin Liquefaction in Ethylene Glycol

Felix Daniel Bobbink, Ning Yan, Xi Chen

This paper describes chitin liquefaction in ethylene glycol (EG) under the catalysis of sulfuric acid for the first time. Up to 75% of chitin was liquefied at 165 degrees C within 90 min by using 8 wt % of acid (refer to the mass of EG). The major products ...

Amer Chemical Soc2014

Energy Consumption Versus Antioxidant Activity of Pressurized Fluid Extracts from Pfaffia glomerata Roots

François Maréchal, Adriano Viana Ensinas, Juliana Queiroz Albarelli, Diego Tresinari dos Santos

Conventional extraction techniques have been applied to obtain antioxidant extracts from Pfaffia glomerata roots, most of the times, using polar extracting solvents. Even if these techniques are able to provide extracts with antioxidant activities, more en ...

2013

Online elemental analysis of process gases with ICP-OES: A case study on waste wood combustion

Christian Ludwig, Marco Wellinger

A mobile sampling and measurement system for the analysis of gaseous and liquid samples in the field was developed. An inductively coupled plasma optical emission spectrometer (ICP-OES), which is built into a van, was used as detector. The analytical syste ...

Elsevier2012

Development and Application of Devices for Online Trace Element Analysis of Thermal Process Gases from Woody Feedstocks

Marco Wellinger

When using natural or waste wood in thermo-chemical conversion processes, the presence of a number of heteroatoms (e.g. sulfur, chlorine, potassium and sodium or heavy metals) may hinder the processes themselves as well as pose a threat to equipment and/or ...

EPFL2012

Estimation of road traffic emission factors from a long term tracer study

Alain Clappier, Luis Carlos Belalcazar Ceron, Erika Maria Zarate Torres, Minh Dung Ho

Road traffic emissions, one of the largest source categories in megacity inventories, are highly uncertain. It is essential to develop methodologies to reduce these uncertainties to manage air quality more effectively. In this paper, we propose a methodolo ...

2009

A self-consistent Hubbard U density-functional theory approach to the addition-elimination reactions of hydrocarbons on bare FeO(+)

Nicola Marzari

We present a detailed analysis of the addition-elimination reaction pathways for the gas-phase conversion of molecular hydrogen and methane on FeO(+) to water and methanol, respectively, using first-principles calculations. These two reactions represent pa ...

2008

Analysis of urban gas phase ammonia measurements from the 2002 Atlanta Aerosol Nucleation and Real-Time Characterization Experiment (ANARChE)

Athanasios Nenes

Gas phase ammonia (NH3) measurements were made in July and August 2002 during the Atlant Aerosol Nucleation and Real-Time Characterization Experiment with two different chemical ionization mass spectrometry techniques. Correlations between the 1 min data f ...

Blackwell Publishing Ltd2006

Spectroscopie optique de petits agrégats d'argent et d'or déposés dans une matrice d'argon

Fabien Conus

The absorption spectra of small silver and gold clusters are presented. The experimental technique consists in depositing clusters in an argon matrix which is illuminated with white light. By collecting the outcoming light from the matrix and by analysing ...

EPFL2005

Mechanisms of Pb(Zr0.53Ti0.47)O-3 thin film etching with ECR/RF reactor

Nava Setter, Paul Muralt, Enrico Colla, Andreas Seifert, Nicolas Ledermann

Ferroelectric capacitive devices for memory and MEMS applications require patterned ferroelectric thin films with high anisotropic etched features. In this paper, physical and chemical parameters during etching of Pb(Zr0.53Ti0.47)O-3 (PZT) by a dual freque ...

2000

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