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Ahmad Galadima,Oki Muraza 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-
The production of high grade jet fuels from vegetable oils is an issue of special interest to refineries. Theconversion process involved hydrotreating (i.e. hydrodeoxygenation and hydrodecarboxylation) of theoils followed by subsequent hydroisomerization. The paper reviewed recent literature on the role ofheterogeneous catalysts in the various processes. Catalysts based on Ni and Mo supported on oxides areconsidered very active for the hydrotreating process whereas Pd and Pt supported on zeolites as the mainhydroisomerization catalysts. However, further studies are still required on the role of catalyst topology,reaction mechanisms and the strategies for mitigating catalyst deactivation.
Revisiting the oxidative coupling of methane to ethylene in the golden period of shale gas: A review
Ahmad Galadima,Oki Muraza 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.37 No.-
Catalytic upgrading of methane in natural gas and/or shale gas via oxidative methane coupling (OMC) isan important option tailored by industry for meeting the global ethylene demand. The paper carefullycaptured and analyzed recent literature on the progress made regarding the OMC reaction. The reviewcovers issues related to the catalytic strategies adopted for enhancing methane conversion, improvingethylene yield and lowering the reaction temperatures. The potentials and challenges of shale gas as analternative to natural gas for the OMC process were adequately highlighted.
Hydrocracking catalysts based on hierarchical zeolites: A recent progress
Ahmad Galadima,Oki Muraza 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.61 No.-
Consequent to the foreseeable depletion of the light crude oil reserves, the heavier hydrocarbon chains would be the focus of the global energy industry. The hydrocracking of vacuum gas oil (VGO) and demetallized oil (DMO) components of the heavy oil presents a promising factor for the global energy future. Catalytically, the hierarchical zeolites are prospective reaction systems been considered. In addition to new routes for the catalyst synthesis, the paper encompassed technological challenges, mechanisms involved, role of catalyst modification, diffusional characteristics and the deactivation parameters associated with the overall process. Areas requiring further investigations were also discussed.
Zeolite catalysts in upgrading of bioethanol to fuels range hydrocarbons: A review
Ahmad Galadima,Oki Muraza 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.31 No.-
The re-ignited trend of global bioethanol production indicated that new valorization paths are necessary. Bioethanol upgrading into fuel range hydrocarbons (FRH) via catalytic dehydration represents analternative for handling the challenges associated with the blending options. The paper carefullyexamined the recent literature on the role of zeolite catalysts during the reaction. Effects of parameterslike catalyst topology and textural properties, modification with metals, acidity and reaction conditionsin enhancing the yield of FRH were critically examined. The influence of these parameters on the reactionmechanism was also simultaneously discussed. The paper finally presented an outlook on new research paths.
The role of alcohols and diols as co-solvents in fabrication of TON zeolite
Anas Karrar Jamil,Oki Muraza,Adnan M. Al-Amer 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-
Numerous industrial catalysts and sorbents require better control of crystal size and morphology of thezeolites. Here, we report a method to selectively control the crystal size and morphology of ZSM-22 byusing alcohols and diols as co-solvents in water–alcohol system. The results demonstrated the role of cosolventin controlling the crystallization growth of ZSM-22 zeolite. Addition of co-solvent suppressednucleation of unwanted cristobalite phase in crystallization and growth of ZSM-22 zeolite. We foundthat alcohols and diols as cheap co-solvent are effective in tuning and controlling crystal size, aspect ratioand co-crystalization phases of zeolite ZSM-22