The catalytic conversion of hydrocarbons for the production of hydrogen and syngas (H2/CO) is of great interest in research and technology. Detailed heterogeneous kinetics can also provide a better understanding of the reactions involved during the catalytic processes commonly used in the synthesis gas production. The developed models can predict conversion and selectivity at varying operation ...

The simultaneous combination of steady state isotopic transient kinetic analysis (SSITKA) with diffuse reflectance Fourier transform spectroscopy (DRIFTS) and mass spectrometric (MS) analysis was applied to study the oxidative carbonylation of methanol (MeOH) to dimethyl carbonate (DMC) on a CuY zeolite catalyst prepared by incipient-wetness impregnation of commercial zeolite NH(4)-Y. The inter...

intermetallic phase formation and oxidation reaction during combustion synthesis (cs) of ni-ti equiatomic mixture are affected by mechanical activation (ma) and pre-heating conditions. important parameters are ignition time, reaction duration, temperature rise, microstructural change, titanium oxidation and intermetallic phase formation. superelasticity and shape memory effects are influenced b...

The liquid-phase photocatalytic oxidation of l-octanol in oxygenated acetoniaile on highly dispersed titanium oxide catalysts anchored onto transparent Vycor glass was compared with that obtained on the standard TiO2 powder. The isolated titanium oxide species anchored onto transparent Vycor glass are responsible for its high photocatalytic activity both in the present liquid-phase oxidation of...

A kinetic mechanism to predict secondary organic aerosol (SOA) formation from the photo-oxidation of toluene was developed and aerosol phase chemistry that includes nucleation, gas-particle partitioning and particle phase reactions as well as the gasphase chemistry of toluene and its degradation products were represented. The mechanism was evaluated against experiments obtained from a Universit...

Electron Paramagnetic Resonance spectroscopy (EPR) coupled with spin trapping methodology has been used to study the formation of free radicals in mainstream cigarette smoke. Kentucky reference cigarettes (2R4F) were smoked using a 20-port smok­ ing machine (Borgwaldt-kc) under ISO smoking conditions. Free radicals in both particulate phase and gas phase smoke were analysed. Short-lived Cand O-...

Despite numerous laboratory investigations, the aqueous phase oxidation of SO1 remains illunderstood. A major reason for this is the failure to treat properly the combined problem of mass transport and chemical reaction. This problem has not been adequately addressed either by experiments with bulk solutions or by experiments with aqueous droplets that have been undertaken in order to circumven...

Methane (CH4) is a potent greenhouse gas. Solar-driven gas phase advanced oxidation processes can fill the technology gap for CH4 removal. In their Review (DOI: 10.1002/chem.202201984). Li, Mu, et al. analyse challenges and prospects propose some ideas research in this area.

Fire-fountain eruptions of basaltic magma occur on Earth at centers such as Kilauea (Hawaii), and deposits from apparently similar eruptions have been found on the lunar surface. The driving force for terrestrial fi re-fountain eruptions is the exsolution of dissolved CO2 based on gases dissolved in melt inclusions trapped in olivine phenocrysts and the relatively high oxidation state of these ...

Oxidation results in the formation of an oxide film whose properties and structure can be tailored by controlling oxidation conditions. Reactive molecular dynamics simulations were performed to study thermal polycrystalline Al substrates as a function O2 density temperature. The structural, chemical, topological aspects (poly-Al) films formed upon studied. studies supported surface topography m...