Verfügbarkeit: Characterization of an inclined rotating tubular fixed bed reactor

Characterization of an inclined rotating tubular fixed bed reactor:

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Bibliographische Detailangaben
Beteilige Person:	Härting, Hans-Ulrich 1982- (VerfasserIn)
Format:	Hochschulschrift/Dissertation Buch
Sprache:	Englisch
Veröffentlicht:	Dresden 2017
Schlagwörter:	Hochschulschrift
Links:	http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=029850752&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
Umfang:	XII, 158 Seiten Illustrationen, Diagramme

Internformat

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Datensatz im Suchindex

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adam_text	C ONTENTS A B STRACT I Z USAM M ENFASSUNG III A CKNOW LEDGEM ENT V 1 IN TROD UCTION 1 1.1 HETEROGENEOUS CATALYSIS AND TRICKLE BED REACTORS............................................. 1 1.2 PROCESS INTENSIFICATION IN TRICKLE BED REACTORS ................................................ 2 1.3 OBJECTIVES AND ORGANIZATION OF THE TH ESIS......................................................... 4 2 B ACKGROUND 6 2.1 INTRODUCTION......................................................................................................... 6 2.2 TRICKLE BED REACTORS .......................................................................................... 6 2.2.1 OPERATION AND DESIGN ........................................................................... 6 2.2.2 CHARACTERISTICS OF FIXED B E D S.................................................................. 8 2.3 HYDRODYNAMICS................................................................................................... 11 2.3.1 FLOW RE G IM E S.......................................................................................... 11 2.3.2 LIQUID HOLDUP.......................................................................................... 13 2.3.3 PRESSURE D RO P .......................................................................................... 15 2.3.4 AXIAL DISPERSION .................................................................................... 17 2.4 HYDRODYNAMIC MODELLING ................................................................................. 19 2.5 HETEROGENEOUS CATALYSIS IN MULTIPHASE REACTORS ............................................. 21 2.6 PROCESS INTENSIFICATION....................................................................................... 23 2.6.1 PERIODIC O P E RA TIO N ................................................................................. 23 2.6.2 REACTION STUDIES FOR PERFORMANCE EVALUATION....................................... 25 2.7 THE INCLINED ROTATING TUBULAR FIXED BED R E A C T O R .............................................. 27 2.7.1 ADDITIONAL OPERATING P A RA M E TE RS......................................................... 27 2.7.2 THE NOVEL REACTOR C O N CEP T..................................................................... 28 3 E XPERIM ENTAL 31 3.1 INTRODUCTION........................................................................................................ 31 3.2 THE INCLINED ROTATING TUBULAR FIXED BED R E A C T O R ............................................. 31 3.3 THE EXPERIMENTAL S E T U P .................................................................................... 33 3.4 GAMMA-RAY COMPUTED TOM OGRAPHY.................................................................. 36 3.4.1 FUNDAMENTALS.......................................................................................... 36 3.4.2 MATHEMATICS OF TOMOGRAPHIC IMAGING ................................................. 37 3.4.3 THE COMPACT MEASUREMENT SY S TE M .................................................... 39 3.4.4 VALIDATION OF THE C OM PAC T .................................................................. 40 3.5 WIRE-MESH SENSOR ............................................................................................. 43 3.5.1 FUNDAMENTALS......................................................................................... 43 3.5.2 THE WIRE-MESH S E N S O R .......................................................................... 45 3.5.3 CALIBRATION OF THE WIRE-MESH S E N S O R .................................................. 46 4 FLOW REGIM ES AND HYDRODYNAM IC PARAM ETERS 48 4.1 INTRODUCTION........................................................................................................ 48 4.2 E XPERIM ENTAL..................................................................................................... 48 4.2.1 S E T U P ..................................................................................................... 48 4.2.2 EXPERIMENTAL CONDITIONS AND PROCEDURES............................................. 49 4.2.3 TOMOGRAPHIC DATA ACQUISITION AND IMAGE RECONSTRUCTION .................. 51 4.3 INVESTIGATION OF FIXED BED POROSITY AND FLOW REGIMES ........................................ 54 4.3.1 FIXED BED P O RO SITY ................................................................................ 54 4.3.2 FLOW REGIME CLASSIFICATION AND DESCRIPTION.......................................... 55 4.3.3 DIMENSIONLESS NUMBERS ....................................................................... 58 4.4 RESULTS FOR AQUEOUS LIQUID S Y S TE M S ................................................................. 59 4.4.1 FLOW REGIME M A P S ................................................................................ 59 4.4.2 DYNAMIC LIQUID SATURATION AND PRESSURE D R O P .................................... 61 4.5 RESULTS FOR ORGANIC LIQUID SYSTEM S .................................................................... 66 4.5.1 FLOW REGIME M A P S ................................................................................ 66 4.5.2 DYNAMIC LIQUID SATURATION AND PRESSURE D R O P .................................... 68 4.6 EVALUATION OF THE NEW REACTOR C O N C E P T ........................................................... 72 4.6.1 RECOMMENDATIONS FOR FLOW REGIME AND LIQUID SA TU RA TIO N ................... 72 4.6.2 ELECTRICAL POWER RE Q U IREM EN T .............................................................. 73 4.7 S U M M A RY ........................................................................................................... 74 5 LIQUID BACKM IXING 76 5.1 INTRODUCTION........................................................................................................ 76 5.2 E XPERIM ENTAL..................................................................................................... 76 5.2.1 S E T U P ..................................................................................................... 76 5.2.2 EXPERIMENTAL CONDITIONS AND PROCEDURES ............................................ 78 5.2.3 PARAMETER ESTIMATION .......................................................................... 79 5.3 RESULTS AND DISCUSSION...................................................................................... 82 5.3.1 EFFECT OF LIQUID SUPERFICIAL VELOCITIES ................................................... 82 5.3.2 EFFECT OF PARTICLE SIZ E ............................................................................. 84 5.4 S U M M A RY ........................................................................................................... 86 6 R EACTION STU D IES 87 6.1 INTRODUCTION........................................................................................................ 87 6.2 E XPERIM ENTAL..................................................................................................... 87 6.2.1 S E T U P ..................................................................................................... 87 6.2.2 CONCENTRATION MEASUREMENT ................................................................. 89 6.2.3 PRETREATMENT OF ALPHA-METHYLSTYRENE................................................... 90 6.2.4 EXPERIMENTAL CONDITIONS AND PROCEDURES............................................. 91 6.3 RESULTS AND DISCUSSION....................................................................................... 92 6.3.1 PRE-WETTING EFFICIENCY........................................................................... 92 6.3.2 PERFORMANCE ENHANCEM ENT..................................................................... 93 6.3.3 MODELLING OF THE REACTION PROGRESS UNDER RO TA TIO N .............................. 96 6.3.4 TEMPERATURE OSCILLATIONS AND FLOW REGIM ES.......................................... 99 6.4 S U M M A RY ........................................................................................................... 102 7 H YDRODYN AM IC M ODELLING AND SIM ULATIONS 103 7.1 INTRODUCTION......................................................................................................... 103 7.2 HYDRODYNAMIC MODELLING ................................................................................. 103 7.2.1 GOVERNING EQ U ATIO N S.............................................................................. 103 7.2.2 CLOSURE FORMULATIONS.............................................................................. 105 7.2.3 WALL FRICTION F O R C E ................................................................................. 105 7.2.4 BODY FORCES DUE TO REACTOR INCLINATION AND RO TA TIO N ........................... 106 7.2.5 FLOW REGIME MORPHOLOGY........................................................................ 107 7.3 METHOD OF SO LU TIO N ............................................................................................. 109 7.3.1 ORGANIZATION OF VARIABLES AND DISCRETIZATION SCH EM ES ........................ 109 7.3.2 BOUNDARY AND INITIAL CONDITIONS............................................................ 112 7.3.3 NUMERICAL SO LU TIO N ................................................................................. 112 7.4 SIMULATION RESULTS ............................................................................................. 114 7.4.1 GENERAL CONSIDERATIONS........................................................................... 114 7.4.2 MODEL VALIDATION SIM U LATIO N S............................................................... 116 7.4.3 EXPLORATORY SIM ULATIONS........................................................................ 119 7.5 S U M M A RY ............................................................................................................ 121 8 SUM M ARY AND OU TLOOK 123 8.1 SUMMARY AND CONCLUSIONS................................................................................. 123 8.1.1 FLOW REGIMES AND HYDRODYNAMIC PARAM ETERS....................................... 124 8.1.2 LIQUID BACKM IXING................................................................................. 124 8.1.3 REACTOR PERFORMANCE ENHANCEM ENT...................................................... 125 8.1.4 HYDRODYNAMIC M O D E LLIN G ..................................................................... 125 8.2 O U TLO O K ............................................................................................................... 126 B IBLIOGRAPHY 128 LIST O F FIGURES 141 LIST O F TABLES 146 A D IM ENSIONLESS NUM BERS 147 A.L AQUEOUS LIQUIDS.................................................................................................. 147 A.2 ORGANIC LIQ U ID S .................................................................................................. 151 B P ICTU RE O F TH E EXP ERIM EN TAL SETU P 155 C O WN PUBLICATIONS 156
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spellingShingle	Härting, Hans-Ulrich 1982- Characterization of an inclined rotating tubular fixed bed reactor
subject_GND	(DE-588)4113937-9
title	Characterization of an inclined rotating tubular fixed bed reactor
title_auth	Characterization of an inclined rotating tubular fixed bed reactor
title_exact_search	Characterization of an inclined rotating tubular fixed bed reactor
title_full	Characterization of an inclined rotating tubular fixed bed reactor von Dipl.-Ing. Hans-Ulrich Härting
title_fullStr	Characterization of an inclined rotating tubular fixed bed reactor von Dipl.-Ing. Hans-Ulrich Härting
title_full_unstemmed	Characterization of an inclined rotating tubular fixed bed reactor von Dipl.-Ing. Hans-Ulrich Härting
title_short	Characterization of an inclined rotating tubular fixed bed reactor
title_sort	characterization of an inclined rotating tubular fixed bed reactor
topic_facet	Hochschulschrift
url	http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=029850752&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
work_keys_str_mv	AT hartinghansulrich characterizationofaninclinedrotatingtubularfixedbedreactor

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