8342

582 دكتري

دكتري

شيمي تجزيه

اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي

1392

بيست و سه،221ص.: مصور،جدول،نمودار

ص.ع.به فارسي وانگليسي

حسن قاضي عسگر، تقي خياميان

9/10/92

مهران غياثي، حسين فقيهيان، محمد سراجي، كيقيباد شمس

شيمي

ID582 دكتري

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Catalytic production of oxygenated fuel additive using supercritical ethanol and Direct coupling of packed column supercritical fluid chromatography to continuous corona discharge ion mobility spectrometry Ahmad Rahmanian Email a rahmanian@ch iut ac ir June 26 2013 Department of Chemistry Isfahan University of Technology 84156 83111 Isfahan Iran1st Supervisor Professor Hassan S Ghaziaskar Email ghazi@cc iut ac ir2st Supervisor Professor Taghi Khayamian Email taghi@cc iut ac irAdvisor Department of Chemistry Isfahan University of Technology Isfahan 84156 83111 Iran Tel 98 311 3913260 Fax 98 311 3912350 Department of Chemistry Isfahan University of Technology Isfahan 84156 83111 Iran Tel 98 311 3913273 Fax 98 311 3912350Abstract A one step continuous conversion of ethanol to 1 butanol and chemicals as fuel additiveor and biogasoline was performed The reactions were performed in a continuous flow fixed bedtubular reactor with alumina supported CuO catalysts and several NiO and Ni solid state catalystssupported on different supports and the effect of temperature pressure ethanol flow rate amountof Cu and Ni loading on conversion of ethanol to 1 butanol were investigated The process is novelas it employs ethanol at its sub and supercritical states At 300oC 150 bar and ethanol flow rate of0 3 ml min 1 with 27 CuO alumina as the catalyst the ethanol conversion and 1 butanol yieldreached above 43 and 16 respectively The 27 NiO Al2O3 catalyst and 8 Ni hydroxyapatiteexhibited the highest yield and selectivity for 1 butanol production Under the conditions of 270oC 150 bar and ethanol flow rate of 0 2 mL min 1 the 1 butanol yield and selectivity respectivelyreached above 20 and 70 over 27 NiO Al2O3 as catalyst respectively The long terminvestigations showed that he catalyst activity is stable for 15 h on stream in the continuousconversion of ethanol The activity of non stoichiometric aluminum phosphate hydroxyapatite for continuousdehydration of ethanol to diethyl ether DEE under sub and supercritical condition wasinvestigated A face centered composite design was used to investigate the effect parameters on thecatalyzed ethanol dehydration Under the optimum conditions of ethanol flow rate of 0 17 mL min 340 oC and 200 bar the DEE yield selectivity ethanol conversion and liquid selectivity reachedabove 75 96 78 and 97 respectively The time on stream investigation showed that thecatalyst remained stable and active for the time duration of 41 h In the other section of this thesis packed column supercritical fluid chromatography SFC was directly coupled to a continuous corona discharge CD ion mobility spectrometer IMS withseveral modifications The main advantage of the developed detector is its capability to introducefull column effluent up to 2000 mL min CO2 gas directly into the IMS cell In addition a heatedinterface was placed between back pressure regulator BPR and the IMS cell to heat the output ofthe BPR for introducing sample as the gas phase into the IMS cell Furthermore a make upmethanol flow was introduced between the column outlet and BPR to provide a more uniform flowthrough the BPR and also to prevent freezing and deposition of the analytes in the BPR Theperformance of the SFC CD IMS was evaluated by analysis of testosterone medroxyprogesterone caffeine and theophylline as test compounds and figures of merit for these compounds have beencalculated Key word Ethanol 1 butanol NiO Al2O3 Ni Al2O3 hydroxyapatite biogasoline CuO alumina Aluminum phosphate Diethyl ether Supercritical ethanol Ion mobility spectrometry Supercritical fluid chromatography Corona Direct coupling 1 Introduction

حسن قاضي عسگر، تقي خياميان

مهران غياثي، حسين فقيهيان، محمد سراجي، كيقيباد شمس