A5051400384- Zeolite Catalysis and Synthesis
- Catalysis and Oxidation Reactions
- Mesoporous Materials and Catalysis
- Risk and Safety Analysis
- Occupational Health and Safety Research
- Chemical Safety and Risk Management
- Catalytic Processes in Materials Science
- Catalysis and Hydrodesulfurization Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Water Treatment and Disinfection
- Ultrasound and Cavitation Phenomena
- Electrocatalysts for Energy Conversion
- Petroleum Processing and Analysis
Purdue University West Lafayette
2018-2022
Institute of Chemical Technology
2011
The mechanistic origin of alkene dimerization on Ni sites supported aluminosilicates has been ascribed to both coordination–insertion (i.e., Cossee-Arlman) and metallacycle-based cycles; the latter is often invoked in absence externally supplied cocatalysts or activators that generate Ni-hydride Ni-alkyl species initiate cycles. Determining prevalent reaction mechanism at complicated by formation consumption dimer products via oligomerization other parallel reactions (e.g., cracking,...
Numerous injuries and fatalities in chemical laboratories the United States over past few decades have suggested need to take measures that go beyond mere compliance toward promoting safer practices. A collaboration between Center for Innovative Strategic Transformation of Alkane Resources Purdue Process Safety Assurance assessed current safety culture at their academic industrial partners by conducting surveys. Key areas improvement were identified from responses surveys, which if addressed...
This mini-review discusses the mechanistic details underlying activation and deactivation behavior, kinetics selectivity among alkene isomer products, observed on Ni-based ordered porous materials during light oligomerization.
Isolated Ni(II) sites supported on zeolites and other porous materials transform in situ during alkene dimerization to form active Ni(II)-alkyl centers, their density influences the kinetic orders mechanisms of deactivation Ni-Beta ethene (453 K). containing high Ni site densities shows rates that are second-order Ni, consistent with a dual-site mechanism involving formation unreactive Ni-alkyl-Ni intermediates, as confirmed by DFT calculations. Under same reaction conditions, contrast, low...
In the past several years, U.S. Chemical Safety Board has found an increase in frequency of laboratory accidents and injuries. An independent survey industrial academic laboratories by authors indicated shortage documentation on best practices lack free user-friendly risk assessment tools to be some key reasons for occurrence safety incidents. Thus, development a framework document, assess, mitigate hazards is critical starting point ensuring safe practices. To address this requirement,...
Abstract Ni cation sites exchanged onto microporous materials catalyze ethene oligomerization to butenes and heavier oligomers but also undergo rapid deactivation. The use of mesoporous supports has been reported previously alleviate deactivation in regimes high pressures low temperatures that cause capillary condensation within voids. Here, we reproduce these prior findings on Ni‐MCM‐41 report that, sharp contrast, reaction conditions nominally correspond Ni‐Beta or Ni‐FAU zeolites do not...