Search Results - "J. Khatib, Sheima"

A critical literature review of the advances in methane dehydroaromatization over multifunctional metal-promoted zeolite catalysts by Menon, Unmesh, Rahman, Mustafizur, Khatib, Sheima J.

“…[Display omitted] •Adding metals to Mo/ZSM-5 confers multifunctionality to the catalysts enhancing their performance in MDA.•Transition metal additives, Fe,…”
Get full text

Impact of the presence of Mo carbide species prepared ex situ in Mo/HZSM-5 on the catalytic properties in methane aromatization by Rahman, Mustafizur, Sridhar, Apoorva, Khatib, Sheima J.

“…[Display omitted] •A new approach to generating zeolite-supported Mo carbide active species with improved performance for methane aromatization is…”
Get full text

Enhancement of Molybdenum/ZSM‐5 Catalysts in Methane Aromatization by the Addition of Iron Promoters and by Reduction/Carburization Pretreatment by Sridhar, Apoorva, Rahman, Mustafizur, Khatib, Sheima J.

“…The influence of an Fe additive and different types of pretreatment were studied on HZSM‐5‐supported molybdenum oxide (MoOx) catalysts for methane…”
Get full text

Silica membranes for hydrogen separation prepared by chemical vapor deposition (CVD) by Khatib, Sheima J., Oyama, S. Ted

“…The preparation of silica membranes by chemical vapor deposition (CVD) is critically reviewed, with focus placed on the two most common supports used, Vycor…”
Get full text

Bimetallic Mo-Co/ZSM-5 and Mo-Ni/ZSM-5 catalysts for methane dehydroaromatization: A study of the effect of pretreatment and metal loadings on the catalytic behavior by Sridhar, Apoorva, Rahman, Mustafizur, Infantes-Molina, Antonia, Wylie, Benjamin J., Borcik, Collin G., Khatib, Sheima J.

“…[Display omitted] •ZSM5-supported Mo carbide catalysts modified with Co and Ni additives were more stable in methane dehydroaromatization.•A synergy is…”
Get full text

Direct Oxidation of Propylene to Propylene Oxide with Molecular Oxygen: A Review by Khatib, Sheima J., Oyama, S. T.

“…The direct oxidation of propylene to propylene oxide (PO) using molecular oxygen has many advantages over existing chlorohydrin and hydroperoxide process,…”
Get full text

Effect of Si/Al ratio of ZSM-5 support on structure and activity of Mo species in methane dehydroaromatization by Rahman, Mustafizur, Infantes-Molina, Antonia, Hoffman, Adam S., Bare, Simon R., Emerson, Kayla L., Khatib, Sheima J.

“…The effect of the Si/Al ratio of the ZSM-5 support on the structure and activity of Mo/HZSM-5 catalysts in methane dehydroaromatization (MDA) was studied…”
Get full text

Increasing the catalytic stability by optimizing the formation of zeolite-supported Mo carbide species ex situ for methane dehydroaromatization by Rahman, Mustafizur, Infantes-Molina, Antonia, Boubnov, Alexey, Bare, Simon R., Stavitski, Eli, Sridhar, Apoorva, Khatib, Sheima J.

“…[Display omitted] •Ex situ formation of supported Mo carbide species for CH4 aromatization was explored.•Mo carbide species formed at lower temperature by slow…”
Get full text

Understanding the Control of Speciation of Molybdenum Oxides in MFI-Type Zeolites by Hiennadi, Emanuele J., Molajafari, Fateme, Rana, Rachita, Hoffman, Adam S., Bare, Simon R., Howe, Joshua D., J. Khatib, Sheima

“…Metal oxide-impregnated zeolites are employed in a wide variety of catalytic reactions, including methane dehydroaromatization (MDA). The most studied…”
Get full text

Location and chemical speciation of Cu in ZSM-5 during the water-gas shift reaction by Vovchok, Dimitriy, Tata, James, Orozco, Ivan, Zhang, Feng, Palomino, Robert M., Xu, Wenqian, Harper, Leah, Khatib, Sheima J., Rodriguez, José A., Senanayake, Sanjaya D.

“…[Display omitted] •Cu/ZSM-5 catalysts active for the water-gas shift reaction were characterized using in situ XRD, AP-XPS and DRIFTS.•WGS Activity increases…”
Get full text

Sulfur resistant Pd and Pd alloy membranes by phosphidation by Khatib, Sheima J., Yun, Samhun, Oyama, S. Ted

“…Novel ultra-thin Pd and Pd-alloy (Pd–Ag, Pd–Cu) membranes, with a phosphorus component, were prepared on a porous hollow fiber α-alumina support. The aim was…”
Get full text

Experimental and Simulation Studies of the Stepped Adsorption of Toluene on Pure-Silica MEL Zeolite by Sánchez-Gil, Vicente, Noya, Eva G, Sanz, Alejandro, Khatib, Sheima J, Guil, José María, Lomba, Enrique, Marguta, Ramona, Valencia, Susana

“…In this work, the adsorption of toluene on pure-silica MEL zeolite is investigated using a variety of experimental and simulation methods. First, we measured…”
Get full text

Structure–activity relationships in alumina-supported molybdena–vanadia catalysts for propane oxidative dehydrogenation by Bañares, Miguel A., Khatib, Sheima J.

“…The interactions between Mo and V on alumina are studied for the oxidative dehydrogenation (ODH) of propane. Dispersed surface molybdena and vanadia species…”
Get full text

Mixed Mechanism Model for Permeation of Gases in Hybrid Inorganic–Organic Membranes by Wang, Zhenxing, Achenie, Luke E. K, Khatib, Sheima J, Oyama, S. Ted

“…A general mixed mechanism model formulated within a grid framework is proposed. In particular, the framework is employed to account for the variability in the…”
Get full text

A critical literature review of the advances in methane dehydroaromatization over multifunctional metal-promoted zeolite catalysts by Menon, Unmesh, Rahman, Mustafizur, Khatib, Sheima J.

“…We report the drastic rise in shale gas production has encouraged the quest for alternative uses of methane as a chemical feedstock in the manufacturing…”
Get full text

Sonochemically Prepared Ni-Based Perovskites as Active and Stable Catalysts for Production of CO x ‑Free Hydrogen and Structured Carbon by Harbin, Hannah J., Unruh, Daniel K., Casadonte, Dominick J., J. Khatib, Sheima

“…A sonochemical method is employed to synthesize LaNiO3 perovskites as catalysts for methane decomposition to produce clean CO x -free hydrogen and structured…”
Get full text

Elucidating the role of Fe-Mo interactions in the metal oxide precursors for Fe promoted Mo/ZSM-5 catalysts in non-oxidative methane dehydroaromatization by Hossain, Md Sifat, Dhillon, Gagandeep Singh, Liu, Liping, Sridhar, Apoorva, Hiennadi, Emanuele J., Hong, Jiyun, Bare, Simon R., Xin, Hongliang, Ericson, Thomas, Cozzolino, Anthony, Khatib, Sheima J.

“…[Display omitted] •Fe2(MoO4)3/ZSM-5 constitutes a stable catalyst in methane dehydroaromatization.•Fe2(MoO4)3/ZSM-5 selectivity to benzene is superior to…”
Get full text

Cover Feature: Enhancement of Molybdenum/ZSM‐5 Catalysts in Methane Aromatization by the Addition of Iron Promoters and by Reduction/Carburization Pretreatment (ChemCatChem 12/2018) by Sridhar, Apoorva, Rahman, Mustafizur, Khatib, Sheima J.

“…The Cover Feature shows how methane from natural gas can be upgraded directly into benzene and hydrogen, both of which are chemical commodities, through the…”
Get full text

Elucidating the role of $\mathrm{Fe}$-$\mathrm{Mo}$ interactions in the metal oxide precursors for Fe promoted $\mathrm{Mo/ZSM}$-5 catalysts in non-oxidative methane dehydroaromatization by Hossain, Md Sifat, Dhillon, Gagandeep Singh, Liu, Liping, Sridhar, Apoorva, Hiennadi, Emanuele J., Hong, Jiyun, Bare, Simon R., Xin, Hongliang, Ericson, Thomas, Cozzolino, Anthony, Khatib, Sheima J.

“…Literature shows that adding Fe as a separate phase to MoO3/ZSM-5 catalysts can improve benzene selectivity in methane dehydroaromatization (MDA), but only…”
Get full text

Bimetallic Mo-Co/ZSM-5 and Mo-Ni/ZSM-5 catalysts for methane dehydroaromatization: A study of the effect of pretreatment and metal loadings on the catalytic behavior by Sridhar, Apoorva, Rahman, Mustafizur, Infantes-Molina, Antonia, Wylie, Benjamin J., Borcik, Collin G., Khatib, Sheima J.

“…Here, methane dehydroaromatization is studied using different loadings (0.2 wt%, 0.6 and 1 wt%) of Co and Ni additives on a 6 wt% Mo/ZSM-5 catalyst to evaluate…”
Get full text