Point discharge microplasma reactor for high efficiency conversion of H2S to SO2 for speciation analysis of sulfide and sulfite using molecular fluorescence spectrometry

2018 ◽  
Vol 1042 ◽  
pp. 79-85 ◽  
Author(s):  
Huimin Yu ◽  
Jing Hu ◽  
Xiaoming Jiang ◽  
Xiandeng Hou ◽  
Yunfei Tian
Keyword(s):  
High Efficiency ◽  
Speciation Analysis ◽  
Fluorescence Spectrometry ◽  
Molecular Fluorescence ◽  
Point Discharge ◽  
Efficiency Conversion

scholarly journals Measurement of Ozone Production Sensor

2010 ◽  
Vol 3 (3) ◽  
pp. 545-555 ◽  
Author(s):  
M. Cazorla ◽  
W. H. Brune
Keyword(s):  
Production Rate ◽  
High Efficiency ◽  
Ambient Air ◽  
Ozone Production ◽  
State University ◽  
Photostationary State ◽  
Sample Chamber ◽  
Efficiency Conversion ◽  
The Difference ◽  
Teflon Film

Abstract. A new ambient air monitor, the Measurement of Ozone Production Sensor (MOPS), measures directly the rate of ozone production in the atmosphere. The sensor consists of two 11.3 L environmental chambers made of UV-transmitting Teflon film, a unit to convert NO2 to O3, and a modified ozone monitor. In the sample chamber, flowing ambient air is exposed to the sunlight so that ozone is produced just as it is in the atmosphere. In the second chamber, called the reference chamber, a UV-blocking film over the Teflon film prevents ozone formation but allows other processes to occur as they do in the sample chamber. The air flows that exit the two chambers are sampled by an ozone monitor operating in differential mode so that the difference between the two ozone signals, divided by the exposure time in the chambers, gives the ozone production rate. High-efficiency conversion of NO2 to O3 prior to detection in the ozone monitor accounts for differences in the NOx photostationary state that can occur in the two chambers. The MOPS measures the ozone production rate, but with the addition of NO to the sampled air flow, the MOPS can be used to study the sensitivity of ozone production to NO. Preliminary studies with the MOPS on the campus of the Pennsylvania State University show the potential of this new technique.

Molecular Design of Unsymmetrical Squaraine Dyes for High Efficiency Conversion of Low Energy Photons into Electrons Using TiO2Nanocrystalline Films

2009 ◽  
Vol 19 (17) ◽  
pp. 2720-2727 ◽  
Author(s):  
Thomas Geiger ◽  
Simon Kuster ◽  
Jun-Ho Yum ◽  
Soo-Jin Moon ◽  
Mohammad K. Nazeeruddin ◽  
...  
Keyword(s):  
High Efficiency ◽  
Molecular Design ◽  
Low Energy ◽  
Squaraine Dyes ◽  
Efficiency Conversion

Stable kilohertz spark discharges for high-efficiency conversion of methane to hydrogen and acetylene

2008 ◽  
Vol 41 (17) ◽  
pp. 175203 ◽  
Author(s):  
Xiao-Song Li ◽  
Can-Kun Lin ◽  
Chuan Shi ◽  
Yong Xu ◽  
You-Nian Wang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Spark Discharges ◽  
Conversion Of Methane ◽  
Efficiency Conversion

High-Efficiency Conversion of Sputtered Ti Thin Films into TiO[sub 2] Nanotubular Layers

2008 ◽  
Vol 11 (7) ◽  
pp. C37 ◽  
Author(s):  
Steffen Berger ◽  
Jan M. Macak ◽  
Julia Kunze ◽  
Patrik Schmuki
Keyword(s):  
Thin Films ◽  
High Efficiency ◽  
Efficiency Conversion

scholarly journals 137Cs Uptake and Translocation in Leafy Vegetable: a Study with Lactuca Sativa L. Grown Under Hydroponic Conditions

2012 ◽  
Vol 11 (2) ◽  
pp. 153-166 ◽  
Author(s):  
Anna Šuňovská ◽  
Miroslav Horník ◽  
Jana Marešová ◽  
Martin Pipíška ◽  
Jozef Augustín
Keyword(s):  
Lactuca Sativa ◽  
High Efficiency ◽  
Speciation Analysis ◽  
Leafy Vegetable ◽  
Plant Tissues ◽  
Visual Minteq ◽  
Lactuca Sativa L ◽  
Translocation Efficiency ◽  
Hydroponic Study ◽  
Hydroponic Conditions

Abstract A hydroponic study involving lettuce plants (Lactuca sativa L.) as a leafy vegetable was conducted to evaluate the 137Cs uptake and translocation in plant tissues in dependence on the presence or absence of K+ or/and NH4+ ions in cultivation media according to Hoagland (HM) during 8 d plants growth under hydroponic conditions. Significant increase of the 137Cs+ uptake by lettuce plants and the decrease of 137Cs+ translocation efficiency from roots to leaves were observed in 50 % HM deficient in K+ and NH4+ ions. Speciation analysis using Visual MINTEQ program showed that at micromolar concentration of CsCl (5 μmol/dm3) in 50 % HM at pH 6.0 and 25 °C, cesium was occurred practically only in the free cationic Cs+ form − 98.8 %, with minor proportions of other cesium species: CsCl − 0.4 %, CsNO3 − 0.4 %, and CsSO4 - − 0.4 %. Surplus of Cl-, NO3- and SO42- ions in HM causes the increase of proportions of the cesium species CsCl, CsNO3 and CsSO4-, respectively at the expense of bioavailable Cs+ form. Radiocesium 137Cs taken up via roots was removed from lettuce leaves with high efficiency by boiling in diluted NaCl solution. At ambient temperature the extraction of 137Cs with diluted acetic acid was concentration and time dependent process, and was succeeded by leakage of tissue components absorbing at 260 nm. These findings are important for the risk assessment of radiocesium entry into the food chain via contaminated leafy vegetable.

Solar Upgrading of Fuels for Generation of Electricity

2001 ◽  
Vol 123 (2) ◽  
pp. 160-163 ◽  
Author(s):  
Rainer Tamme ◽  
Reiner Buck ◽  
Michael Epstein ◽  
Uriyel Fisher ◽  
Chemi Sugarmen
Keyword(s):  
Gas Turbines ◽  
Large Scale ◽  
Fossil Fuels ◽  
High Efficiency ◽  
Combined Cycle ◽  
Test Facility ◽  
Small Scale ◽  
Start Up ◽  
Efficiency Conversion ◽  
Solar Field

This paper presents a novel process comprising solar upgrading of hydrocarbons by steam reforming in solar specific receiver-reactors and utilizing the upgraded, hydrogen-rich fuel in high efficiency conversion systems, such as gas turbines or fuel cells. In comparison to conventionally heated processes about 30% of fuel can be saved with respect to the same specific output. Such processes can be used in small scale as a stand-alone system for off-grid markets as well as in large scale to be operated in connection with conventional combined-cycle plants. The complete reforming process will be demonstrated in the SOLASYS project, supported by the European Commission in the JOULE/THERMIE framework. The project has been started in June 1998. The SOLASYS plant is designed for 300 kWel output, it consists of the solar field, the solar reformer and a gas turbine, adjusted to operate with the reformed gas. The SOLASYS plant will be operated at the experimental solar test facility of the Weizmann Institute of Science in Israel. Start-up of the pilot plant is scheduled in April 2001. The midterm goal is to replace fossil fuels by renewable or non-conventional feedstock in order to increase the share of renewable energy and to establish processes with only minor or no CO2 emission. Examples might be upgrading of bio-gas from municipal solid waste as well as upgrading of weak gas resources.

High-Efficiency Conversion of Threading Screw Dislocations in 4H-SiC by Solution Growth

2012 ◽  
Vol 5 (11) ◽  
pp. 115501 ◽  
Author(s):  
Yuji Yamamoto ◽  
Shunta Harada ◽  
Kazuaki Seki ◽  
Atsushi Horio ◽  
Takato Mitsuhashi ◽  
...  
Keyword(s):  
High Efficiency ◽  
Solution Growth ◽  
Screw Dislocations ◽  
Efficiency Conversion
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