Catalytic conversion of methanol to olefins over HZSM-5 catalysts:
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
2013
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| Schlagworte: | |
| Online-Zugang: | Volltext https://nbn-resolving.org/urn:nbn:de:bvb:91-diss-20131210-1185872-0-1 Inhaltsverzeichnis |
| Beschreibung: | VI, 132 Bl. Ill., graph. Darst. |
Internformat
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Datensatz im Suchindex
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| adam_text | TABLE OF CONTENTS
TABLE OF CONTENTS
ACKNOWLEDGEMENTS I
ABSTRACT III
TABLE OF CONTENTS IV
CHAPTER 1
INTRODUCTION 1
1.1 GENERAL BACKGROUND: MARKET IS AWAITING MORE OLEFINS 2
1.2 COMMERCIAL TECHNOLOGIES IN METHANOL CONVERSION 4
1.3 MECHANISTIC ASPECTS IN MTO REACTION 9
1.3.1. EARLY PROPOSALS OF DIRECT C-C COUPLING 10
1.3.2. AUTOCATALYSIS 11
1.3.3. HYDROCARBON POOL MECHANISM 13
1.3.4. DUAL CYCLE CONCEPT 16
1.4 PHOSPHOROUS INDUCED ZEOLITE MODIFICATIAONS 19
1.5 SCOPE OF THE THESIS 21
1.6 REFERENCES 22
CHAPTER 2
IMPACT OF CO-FEEDING AROMATICS AND OLEFINS IN THE METHANOL-TO-
OLEFINS CONVERSION OVER HZSM-5 CATALYSTS
26
2.1. INTRODUCTION 27
2.2. EXPERIMENTAL 29
2.2.1. CATALYST AND REAGENTS 29
2.2.2. CATALYTIC TESTING 30
2.3. RESULTS AND DISCUSSION 31
- IV -
HTTP://D-NB.INFO/1048024695
TABLE OF CONTENTS
2.3.1. REACTION PATH OF METHANOL-TO-OLEFINS CONVERSION OVER
HZSM-5 CATALYSTS 31
2.3.2. IMPACT OF AROMATICS CO-FEEDING ON THE METHANOL CONVERSION 33
2.3.2.1 IMPACT OF CO-FEEDING/?- OR /W-XYLENE 34
2.3.2.2 IMPACT OF TOLUENE AND BENZENE CO-FEEDING ON METHANOL CONVERSION
40
2.3.3. IMPACT OF CO-FEEDING OLEFINS ON METHANOL CONVERSION 43
2.3.3.1 IMPACT OF 1-PENTENE CO-FEEDING ON THE METHANOL CONVERSION 43
2.3.3.2 IMPACT OF THE NATURE OF CO-FED OLEFINS ON THE METHANOL
CONVERSION 49
2.4. CONCLUSIONS 54
2.5. ACKNOWLEDGEMENTS 55
2.6. REFERENCES 55
CHAPTER 3
INSIGHTS INTO REACTION PATHWAYS OF METHANOL-TO-OLEFINS CONVERSION
OVER HZSM-5 ZEOLITE
57
3.1. INTRODUCTION 58
3.2. EXPERIMENTAL 60
CATALYST AND REAGENTS, AND CATALYTIC TESTING 60
3.3. RESULTS AND DISCUSSION 62
3.3.1. AUTOCATALYSIS VERSUS HYDROCARBON POOL PROPOSAL 62
3.3.2. INSIGHTS FROM AROMATICS AND OLEFIN CO-FEEDING 66
3.3.3. COMPARISON WITH OLEFIN CRACKING 71
3.3.4. IMPACT OF METHANOL TO CO-FEED RATIO ON PRODUCT DISTRIBUTION 78
3.3.5. TOWARDS ELUCIDATING THE WORKING MECHANISM IN MTO OVER HZSM-5 82
3.4. CONCLUSIONS 85
3.5. ACKNOWLEDGEMENTS 86
3.6. REFERENCES 86
- V
TABLE OF CONTENTS
CHAPTER 4
IMPACT OF REACTION CONDITIONS AND CATALYST MODIFICATIONS ON THE
METHANOL-TO-OLEFINS REACTION OVER HZSM-5 CATALYSTS
89
4.1. INTRODUCTION 90
4.2. EXPERIMENTAL 91
4.2.1. SAMPLE PREPARATIONS 91
4.2.1.1 ZEOLITES 91
4.2.1.2 PHOSPHOROUS MODIFICATIONS AND STEAMING 92
4.2.2. CATALYTIC TESTING 93
4.2.2.1 ACTIVITY AND REACTION PATHWAY EVALUATIONS 93
4.2.2.2 CATALYTIC PERFORMANCE TESTING 94
4.3. RESULTS AND DISCUSSION 96
4.3.1. IMPACT OF REACTION CONDITIONS ON MTO REACTION 96
4.3.1.1 EFFECT OF REACTION TEMPERATURE 96
4.3.1.2 IMPACT OF REACTION TEMPERATURE ON MTO LONG-TERM PERFORMANCE 101
4.3.2. EFFECT OF METHANOL PRESSURE ON PRODUCT SELECTIVITY 105
4.3.3. IMPACT OF P DOPING 110
4.3.3.1 IMPACT OF PHOSPHOROUS DOPING OF ZSM-5 WITH VARIOUS SI/AL RATIOS
110
4.3.3.2 IMPACT OF TEST CONDITIONS AND WATER WASHING 116
4.4. CONCLUSIONS 123
4.5. ACKNOWLEDGEMENTS 125
4.6. REFERENCES 125
CHAPTER 5
SUMMARY AND CONCLUSIONS 127
CURRICULUM VITAE 130
LIST OF PUBLICATIONS TO BE SUBMITTED 131
LIST OF PRESENTATIONS 132
VI -
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| language | English |
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| physical | VI, 132 Bl. Ill., graph. Darst. |
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| spelling | Sun, Xianyong Verfasser aut Catalytic conversion of methanol to olefins over HZSM-5 catalysts Xianyong Sun 2013 VI, 132 Bl. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier München, Techn. Univ., Diss., 2013 (DE-588)4113937-9 Hochschulschrift gnd-content Erscheint auch als Online-Ausgabe urn:nbn:de:bvb:91-diss-20131210-1185872-0-1 http://mediatum.ub.tum.de/node?id=1185872 Verlag kostenfrei Volltext https://nbn-resolving.org/urn:nbn:de:bvb:91-diss-20131210-1185872-0-1 Resolving-System DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=026996792&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Sun, Xianyong Catalytic conversion of methanol to olefins over HZSM-5 catalysts |
| subject_GND | (DE-588)4113937-9 |
| title | Catalytic conversion of methanol to olefins over HZSM-5 catalysts |
| title_auth | Catalytic conversion of methanol to olefins over HZSM-5 catalysts |
| title_exact_search | Catalytic conversion of methanol to olefins over HZSM-5 catalysts |
| title_full | Catalytic conversion of methanol to olefins over HZSM-5 catalysts Xianyong Sun |
| title_fullStr | Catalytic conversion of methanol to olefins over HZSM-5 catalysts Xianyong Sun |
| title_full_unstemmed | Catalytic conversion of methanol to olefins over HZSM-5 catalysts Xianyong Sun |
| title_short | Catalytic conversion of methanol to olefins over HZSM-5 catalysts |
| title_sort | catalytic conversion of methanol to olefins over hzsm 5 catalysts |
| topic_facet | Hochschulschrift |
| url | http://mediatum.ub.tum.de/node?id=1185872 https://nbn-resolving.org/urn:nbn:de:bvb:91-diss-20131210-1185872-0-1 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=026996792&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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