Chemical Titration of Promoted Ag/α‐Al2O3 Ethylene Epoxidation Catalysts
Sign Up to like & getrecommendations! Published in 2023 at "ChemCatChem"
DOI: 10.1002/cctc.202300329
Abstract: We enumerate the active site density for a promoted Ag/α‐Al2O3 ethylene epoxidation catalyst (35 wt.% Ag) by using trifluoroethanol as a chemical titrant. Trifluoroethanol, when introduced into the reactant stream, deprotonates to deposit stable trifluoroethoxy or… read more here.
Keywords: epoxidation; ethylene epoxidation; promoted al2o3; site ... See more keywords
The synergistic effect between crystal planes and promoters on Ag-catalyzed ethylene epoxidation
Sign Up to like & getrecommendations! Published in 2019 at "Applied Surface Science"
DOI: 10.1016/j.apsusc.2019.01.076
Abstract: Abstract It is well-known that the promoter can enhance the selectivity to ethylene oxide (EO) of Ag catalyzed ethylene epoxidation. However, the selectivity enhancement on different crystal planes of Ag catalysts derived from various promoters… read more here.
Keywords: synergistic effect; crystal planes; catalyzed ethylene; ethylene epoxidation ... See more keywords
Ethylene epoxidation on Ag/YSZ electrochemical catalysts: Understanding of oxygen electrode reactions
Sign Up to like & getrecommendations! Published in 2019 at "Electrochemistry Communications"
DOI: 10.1016/j.elecom.2019.106495
Abstract: Abstract In this study, we have investigated, for the very first time, the oxygen electrode reactions on Ag/YSZ electrochemical catalysts both in oxygen and under reaction conditions compatible with the ethylene epoxidation reaction. Electrochemical Impedance… read more here.
Keywords: oxygen electrode; ethylene epoxidation; reaction; electrode reactions ... See more keywords
Preparation and particle size effects of Ag/Α-Al2O3 catalysts for ethylene epoxidation
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Catalysis"
DOI: 10.1016/j.jcat.2017.10.001
Abstract: Abstract Currently, for the industrial ethylene epoxidation α-alumina supported silver catalysts are the only catalyst of choice. We demonstrate a novel method to produce these catalysts with different silver particle sizes, but without changing other… read more here.
Keywords: particle size; ethylene epoxidation; particle; preparation ... See more keywords
Molecular characteristics governing chlorine deposition and removal on promoted Ag catalysts during ethylene epoxidation
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Catalysis"
DOI: 10.1016/j.jcat.2019.07.043
Abstract: Abstract The selectivity of Ag ethylene epoxidation catalysts correlates with surface coverage of the promoter chlorine. Cl coverage, in turn, is a function of co-fed organic chloride and alkane moderator pressures. Organic molecules can be… read more here.
Keywords: epoxidation; characteristics governing; ethylene epoxidation; coverage ... See more keywords
Selectivity-Driven Design of the Ag–Cu Alloys for the Ethylene Epoxidation
Sign Up to like & getrecommendations! Published in 2019 at "Industrial & Engineering Chemistry Research"
DOI: 10.1021/acs.iecr.9b01542
Abstract: Recent experiential and theoretical studies have shown that the Ag–Cu bimetallic catalysts possess a high selectivity toward ethylene oxide (EO) in ethylene epoxidation. However, the dependence of selectivity toward EO on Ag–Cu composition remains unclear.… read more here.
Keywords: design alloys; driven design; selectivity driven; ethylene epoxidation ... See more keywords
The Selective Species in Ethylene Epoxidation on Silver
Sign Up to like & getrecommendations! Published in 2018 at "ACS Catalysis"
DOI: 10.1021/acscatal.8b00660
Abstract: Silver’s unique ability to selectively oxidize ethylene to ethylene oxide under an oxygen atmosphere has long been known. Today it is the foundation of ethylene oxide manufacturing. Yet, the mechanism of selective epoxide production is… read more here.
Keywords: oxygen; species ethylene; selective species; ethylene oxide ... See more keywords
Ca–Ag compounds in ethylene epoxidation reaction
Sign Up to like & getrecommendations! Published in 2019 at "Science and Technology of Advanced Materials"
DOI: 10.1080/14686996.2019.1655664
Abstract: ABSTRACT The ethylene epoxidation is a challenging catalytic process, and development of active and selective catalyst requires profound understanding of its chemical behaviour under reaction conditions. The systematic study on intermetallic compounds in the Ca–Ag… read more here.
Keywords: ethylene epoxidation; epoxidation; epoxidation reaction; compounds ethylene ... See more keywords