Molecules 2011, 16(9), 7844-7863; doi:10.3390/molecules16097844
Review

One Step Formation of Propene from Ethene or Ethanol through Metathesis on Nickel Ion-loaded Silica

email
Received: 30 June 2011; in revised form: 4 August 2011 / Accepted: 5 September 2011 / Published: 13 September 2011
(This article belongs to the Special Issue Olefin Metathesis and Its Application)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Increased propene production is presently one of the most significant objectives in petroleum chemistry. Especially the one-step conversion of ethene to propene (ETP reaction, 3C2H4 ® 2C3H6) is the most desired process. In our efforts, nickel ion-loaded mesoporous silica could turn a new type of ETP reaction into reality. The one-step conversion of ethene was 68% and the propene selectivity was 48% in a continuous gas-flow system at 673 K and atmospheric pressure. The reactivity of lower olefins and the dependences of the ETP reaction on the contact time and the partial pressure of ethene were consistent with a reaction mechanism involving dimerization of ethene to 1-butene, isomerization of 1-butene to 2-butene, and metathesis of 2-butene and ethene to yield propene. The reaction was then expanded to an ethanol-to-propene reaction on the same catalyst, in which two possible reaction routes are suggested to form ethene from ethanol. The catalysts were characterized mainly by EXAFS and TPR techniques. The local structures of the nickel species active for the ETP reaction were very similar to that of layered nickel silicate, while those on the inert catalysts were the same as that of NiO particles. 
Keywords: ethene; ethanol; propene; metathesis; nickel; mesoporous silica
PDF Full-text Download PDF Full-Text [1975 KB, uploaded 18 June 2014 19:40 CEST]

Export to BibTeX |
EndNote


MDPI and ACS Style

Iwamoto, M. One Step Formation of Propene from Ethene or Ethanol through Metathesis on Nickel Ion-loaded Silica. Molecules 2011, 16, 7844-7863.

AMA Style

Iwamoto M. One Step Formation of Propene from Ethene or Ethanol through Metathesis on Nickel Ion-loaded Silica. Molecules. 2011; 16(9):7844-7863.

Chicago/Turabian Style

Iwamoto, Masakazu. 2011. "One Step Formation of Propene from Ethene or Ethanol through Metathesis on Nickel Ion-loaded Silica." Molecules 16, no. 9: 7844-7863.

Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert