Selective ethylene dimerization by a nickel-exchanged metal-organic framework catalyst
Name
974642536-MIT.pdf
Description
Full printable version
Size
4.67 MB
Format
Adobe PDF
Checksum (MD5)
fc204f05138232996baa597a53b94aaf
Author(s)
Martin, Kathleen E. (Kathleen Ewing)
Advisor(s)
Mircea Dincă.
Date Issued
2016
Publisher
Massachusetts Institute of Technology
Abstract
Short linear [alpha]-olefins such as 1-butene are valuable commodity chemicals due to their use as comonomers in linear low-density polyethylene. Presently only homogeneous systems are used to catalyze ethylene dimerization in industry, causing many to suffer from quick deactivation and poor selectivity. The metal-organic framework (MOF) CPF-5 Mn₅(TBA)₃(HCOO)₃(OH)(H₂O₂)2]]₄·6DMF where TBA = 4-(l H-tetrazol-5-yl)benzoic acid provides an ideal structural template for the development of a heterogeneous catalyst for ethylene dimerization. Ni exchanged CPF-5 (Ni-CPF-5) treated with diethylaluminum chloride had a maximum turnover frequency of 23,000 mole ethylene per mole Ni per hour, and a maximum selectivity for 1-butene of 80% under optimized conditions. Ethylene pressure strongly influenced the activity and selectivity of Ni-CPF-5. Though the observed activity behavior is similar, the selectivity trends diverged significantly from previously reported MOF dimerization catalysts.
Description
Thesis: S.M., Massachusetts Institute of Technology, Department of Chemistry, 2016.
Cataloged from PDF version of thesis. Vita.
Includes bibliographical references (pages 31-32).
Subjects
Chemistry.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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