Güncel Gönderiler: Mühendislik Fakültesi
Toplam kayıt 2037, listelenen: 721-740
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Pyrolysis Kinetics and Thermal Decomposition Behavior of Polycarbonate - a Tga-Ftir Study
(Vinca Inst Nuclear Sci, 2014)This study covers the thermal degradation of polycarbonate by means of Thermogravimetric Analyzer coupled with Fourier transform infrared spectrometer (TGA-FTIR). Thermogravimetric analysis of polycarbonate was carried out ... -
Kinetics of the Hydration of Ethylene Oxide in the Presence of Heterogeneous Catalyst
(American Chemical Society, 2009)Kinetic data on the hydration of ethylene oxide was obtained from both uncatalyzed and heterogeneously catalyzed reactions using a pressurized batch reactor. Amberjet 4200/HCO(3)(-) was used as the heterogeneous catalyst, ... -
Reaction kinetics of the catalytic esterification of acrylic acid with propylene glycol
(Elsevier Science BV, 2009)The kinetics of esterification of acrylic acid with propylene glycol has been studied in the presence of Amberlyst-15 as a heterogeneous catalyst. The reaction was realized in a batch reactor at different temperatures and ... -
Investigation of the Dissolution Kinetics of Meta-Kaolin in H2SO4 Solution
(American Chemical Society, 2010)Kaolin with a given size distribution was calcined at 1023 K for 2 h then digested in 3 0, 4 5, and 60 N sulfuric acid at constant temperatures within the range 328-358 K The samples taken from the solution at predetermined ... -
A study on the porosity development for biomass based carbonaceous materials
(Elsevier Science BV, 2015)This study deals with the structural and morphological changes occurring during pyrolysis and activation steps for the production of porous carbons from an arid-land plant Euphorbia rigida. A fixed-bed retort was used for ... -
Impregnation of 12-tungstophosphoric acid on tonsil: An effective catalyst for esterification of formic acid with n-butyl alcohol and kinetic modeling
(Elsevier Science BV, 2014)Esterification of formic acid with n-butanol was catalyzed by dodecatungstophosphoric acid, H-3 PW12O40 (DTP) impregnated on tonsil earth. A series of catalysts containing 10%, 20% and 30% of DTP on tonsil earth were ... -
Kinetic Study of the Hydration of Propylene Oxide in the Presence of Heterogeneous Catalyst
(Assoc Chemical Eng, 2017)The kinetics of the hydration of propylene oxide was studied using a pres-surized batch reactor for both uncatalyzed and heterogeneously catalyzed reactions. Lewatit MonoPlus M500/HCO3- was used as heterogeneous cat-alyst, ... -
The Seebeck coefficient and the Peltier effect in a polymer electrolyte membrane cell with two hydrogen electrodes
(Pergamon-Elsevier Science LTD, 2013)We report that the Seebeck coefficient of a Nafion membrane cell with hydrogen electrodes saturated with water vapour, at 1 bar hydrogen pressure and 340 K, is equal to 670 +/- 50 mu V/K, meaning that the entropy change ... -
Methanol to hydrocarbons over large cavity zeolites: Toward a unified description of catalyst deactivation and the reaction mechanism
(Academic Press Inc Elsevier Science, 2010)The reaction mechanism for the conversion of methanol to hydrocarbons over three large cavity zeolites, H-beta, H-MCM-22, and H-mordenite, has been investigated. (13)C methanol was co-reacted with (12)C benzene to study ... -
Optimization of desilication parameters of low-silica ZSM-12 by Taguchi method
(Elsevier Science BV, 2019)Zeolite ZSM-12 was synthesized by a direct hydrothermal method and subsequently desilicated by alkaline treatment under different conditions. Changes in the properties of the zeolite samples were investigated by XRD, ... -
Optimization of structural combinations on the performance of a PEMFC's MEA
(Elsevier Science BV, 2008)In this study, the Taguchi method was applied to determine optimum structural combination of a membrane electrode assembly (MEA) in obtaining maximum power density of a PEMFC. Performance measure analysis was also followed ... -
Kinetics of esterification of acetic acid with 1-octanol in the presence of Amberlyst 36
(Elsevier Science BV, 2012)Kinetic data on the esterification of acetic acid with 1-octanol were obtained from both uncatalyzed and heterogeneously catalyzed reactions using a stirred batch reactor in toluene. The equilibrium constant, K-C, which ... -
Flue gas desulfurization by citrate process and optimization of working parameters
(Elsevier Science Sa, 2010)In this study, model flue gas was bubbled into 0.25 L tribasic sodium citrate (TSC) solution being in 0.5 L glass absorber to remove its SO2 content. Size of gas bubbles, absorption temperature, gas flow rate, solution ... -
Sonochemical synthesis and loading of PbS nanoparticles into mesoporous silica
(Elsevier Science BV, 2018)A sonochemical method was used for simultaneous synthesis and loading of lead sulfide (PbS) nanoparticles into mesoporous SBA-15 (Santa Barbara Amorphous). In this study, the effect of different loading ratios (30, 45, 60, ... -
Zap suyu havzası hidroelektirik potansiyelinin araştırılması
(2007)Bu makalede, Zap suyu havzası hidroelektrik potansiyeli (HEP) araştırılmıştır. Zap suyu havzası, Dicle havzasının bir ah havzasıdır. Bölgenin %96'sından fazlası dağlıktır. Zap suyunun drenaj alanı 6780 km' olup, Güneydoğu ... -
Baraj hazne işletme çalışmalarında yeni kriterler
(2004)Baraj işletme çalışmalarında, barajdan bırakılan suların, mansapta taşkınlara sebep olmaması gerekir. Özellikle barajın mansabmda büyük bir havza varsa ve bu havzaya düşen yağışlardan dolayı meydana gelen yüzeysel akış ... -
Kinetics of esterification of acetic acid with n-amyl alcohol in the presence of Amberlyst-36
(Elsevier Science BV, 2011)The kinetics of esterification of acetic acid with amyl alcohol has been studied in the presence of Amberlyst-36 in its H(+) form in a batch reactor. Experimental findings showed that the reaction is controlled by chemical ... -
Akarçay havzası için entegre su kaynakları yönetimininbelirlenmesinde weap (water evaluation and planning system) modelininuygulamas
(2016)Günümüzde hızla atan nüfus ve buna bağlı gelişen içme-kullanma, sulama ve endüstri su ihtiyaçlarının karşılanabilmesi, ancak entegre bir su yönetiminin etkin şekilde uygulamasıyla mümkün olabilmektedir. Bu bağlamda, su ... -
A Comparative Study on Characterization of 12-Tungstophosphoric Acid Cesium Salt Depending on Synthesis Methods
(Asian Journal Of Chemistry, 2014)12-Tungstophosphoric acid cesium salt, Cs2.5H0.5PW12O40, exhibits high catalytic activity for various kinds Of acid-catalyzed reactions. This excellent catalytic effect of Cs2.5H0.5PW12O40 is attributed to its strong acidity ... -
Dalgakıranlarda blok ağırlıklarının belirlenmesi üzerine yapılan çalışmaların incelenmesi
(2000)Kıyılarda inşa edilen taş dolgu dalgakıranlar, dinamik dalga etkilerine, koruyucu tabakasında kullanılan bloklar ağırlıkları ile karşı koyarlar. Bu nedenle koruyucu tabaka blok ağırlığının belirlenmesi yapı stabilitesi ...
