The sulfidation of Fe-15 wt%Y and Fe-30 wt%Y in H 2 H 2 S mixtures at 600–800 °C

Niu, Y.; Gesmundo, F.; Castello, Paolo; Yan, Ruining; Viani, F.; Wu, Wei

doi:10.1016/s0010-938x(97)00017-6

Cited by 14 publications

(6 citation statements)

References 20 publications

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“…5 The polymeric LEDs offer the flexibility of tuning the luminescent properties of the device through manipulation of polymer chemical structures. [6][7][8][9][10] PPVs were the first polymers used for fabrication of LED, 11 and still attract considerable attention. The improvement of the external quantum efficiency of polymeric LEDs is an important challenge.…”

Section: Introductionmentioning

confidence: 99%

Bipolar poly(p‐phenylene vinylene)s bearing electron‐donating triphenylamine or carbazole and electron‐accepting quinoxaline moieties

Karastatiris

Mikroyannidis

Spiliopoulos

2008

J. Polym. Sci. A Polym. Chem.

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Two new poly(phenylene vinylene)s (PPVs) carrying electron‐donating triphenylamine or carbazole and electron‐deficient quinoxaline units were synthesized and characterized. Their properties were compared with those of PPV containing only quinoxaline unit. The two polymers showed PL maximum at 501–510 in solution and 533–540 in thin film. Because of the presence of electron donor and acceptor units they displayed strong intramolecular charge transfer (ICT) effects; hence, low‐photoluminescence quantum yields. The polymers showed reversible electrochemical reduction with electron affinity of 2.75 eV and irreversible oxidation with ionization potential of 5.10–5.24 eV. Single‐layer LED of configuration ITO/PEDOT/polymer/Al showed low turn‐on voltage at 5 V, but limited brightness of 50–60 cdm−2. The electroluminescence maximum was voltage‐tunable varying from 500 to 542 nm. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 2367–2378, 2008

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Section: Introductionmentioning

confidence: 99%

Bipolar poly(p‐phenylene vinylene)s bearing electron‐donating triphenylamine or carbazole and electron‐accepting quinoxaline moieties

Karastatiris

Mikroyannidis

Spiliopoulos

2008

J. Polym. Sci. A Polym. Chem.

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“…The three top cited manuscripts were reviews of lignocellulosic biomass pyrolysis (with 146 citations), [48] then methanation (128 citations), [49] and ash generated from biomass combustion (98 citations). [50] The top 11 cited publications were reviews and the Journal of Catalysis published the most cited article (49 citations), which applied nickel phosphide catalysts to upgrade pyrolysis bio-oil. [51] During this period Can.…”

Section: Characterization Techniquesmentioning

confidence: 99%

Experimental methods in chemical engineering: Reactors—fluidized beds

et al. 2019

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Industry relies on fluidized beds to synthesize chemicals (acrylonitrile, maleic anhydride, titanium dioxide, vinyl chloride), combust coal, dry powders, and treat waste. Fluidized bed folklore declares that they are hard to scale‐up and the gas phase is backmixed. Commercial failures that disregard standard design criteria around powder management, gas/solids injection, and mixing reinforce this belief. However, engineers select fluidized beds for processes that are impractical with conventional technologies to achieve economies of scale for highly exothermic, endothermic, or explosive reactions, for catalysts that deactivate in seconds (or minutes), and for chemistry that requires multiple dosing cycles. Failures are more frequent for these challenging applications. For this reason, researchers study reaction kinetics in fixed beds despite internal mass transfer limitations and axial and radial temperature and concentration gradients. Fluidized bed hydrodynamics vary with powder properties (particle diameter, size distribution, density, sphericity), operating conditions (gas density, viscosity, temperature, pressure), reactor geometry (diameter, height, mass, grid geometry). The minimum fluidization velocity (Umf) is a property that identifies the transition from the fixed bed regime to the fluidized bed regime and equals the gas velocity at which the upward drag force equals the weight of the powder. At the experimental scale, fluidized beds operate isothermally, solids are completely backmixed, and the gas phase is close to plug flow (Ug<-0.25em3Umf). Here, we describe the relationship between powder properties and fluidization quality, list experimental techniques, describe recent applications, and gas phase hydrodynamics and uncertainties.

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“…al., 2009;Semwal et al, 2013). In recent years, thiadiazoles and their metal complexes have been extensively studied because of their potential applications in pharmaceutical, agriculture, industrial, polymer and coordination chemistry (Richardson et al, 2002;Leung-Toung et al, 2003;Bentiss et al, 2004;Niu et al, 2008;Boeini, 2009;Klingele et al, 2010;Bhuvaa et al, 2011;Klingele et al, 2012;Liu et al, 2012). Thiadiazoles with two substituted pyridyl groups, i.e.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, structure, thermal decomposition and spectral properties of neutral [Fe(bpta)₂(etOH)₂(NCS)₂]

Lukačovičová¹,

Uhrecký²,

Moncóľ³

et al. 2015

Acta Chimica Slovaca

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The main aim of the work is to assess physical parameters of forest woodchips and their impact on the prices achieved by the supplier in transactions with a power plant. During fragmentation of logging residue, high content of green matter and contaminants negatively impacts the quality parameters that serve as basis for settlements. The analysis concerns data on the main parameters -water content, fuel value, sulphur and ash content -from 252 days of deliveries of forest chips to a power plant. The deliveries were realised from forested areas on an average about 340 km from the plant. Average water content and the resultant fuel value of forest chips was within 27-47% and 8.7-12.9 GJ×Mg −1 (appropriately), respectively. They depend on the month in which they are delivered to the power plant. The threshold values for the above-mentioned parameters are set by the plant at a real level and the suppliers have no problems with meeting them. The parameter that is most frequently exceeded is ash content (11.5% of cases). The settlement system does not differentiate on the basis of the transport distance but gives possibility to lower the settlement price when the quality parameters are not met but provides no reward for deliveries with parameters better than the average ones. On the basis of results obtained, it was calculated that average annual settlement price is lower than the contract price by about 0.20 PLN×GJ −1 , which in case of the analysed company may translate into an average daily loss of about 700 PLN.

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The sulfidation of Fe-15 wt%Y and Fe-30 wt%Y in H 2 H 2 S mixtures at 600–800 °C

Cited by 14 publications

References 20 publications

Bipolar poly(p‐phenylene vinylene)s bearing electron‐donating triphenylamine or carbazole and electron‐accepting quinoxaline moieties

Bipolar poly(p‐phenylene vinylene)s bearing electron‐donating triphenylamine or carbazole and electron‐accepting quinoxaline moieties

Experimental methods in chemical engineering: Reactors—fluidized beds

Synthesis, structure, thermal decomposition and spectral properties of neutral [Fe(bpta)₂(etOH)₂(NCS)₂]

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The sulfidation of Fe-15 wt%Y and Fe-30 wt%Y in H 2 H 2 S mixtures at 600–800 °C

Cited by 14 publications

References 20 publications

Bipolar poly(p‐phenylene vinylene)s bearing electron‐donating triphenylamine or carbazole and electron‐accepting quinoxaline moieties

Bipolar poly(p‐phenylene vinylene)s bearing electron‐donating triphenylamine or carbazole and electron‐accepting quinoxaline moieties

Experimental methods in chemical engineering: Reactors—fluidized beds

Synthesis, structure, thermal decomposition and spectral properties of neutral [Fe(bpta)2(etOH)2(NCS)2]

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Synthesis, structure, thermal decomposition and spectral properties of neutral [Fe(bpta)₂(etOH)₂(NCS)₂]