Unravelling the redox mechanism and kinetics of a highly active and selective Ni-based material for the oxidative dehydrogenation of ethane

Abstract

Ethane oxidative dehydrogenation (ODH-C2) is a promising alternative for producing ethylene. Even if SnO2-NiO catalysts are characterized by their long-term stability and high selectivity to ethylene, also in the absence...

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

“…A less intensive oxygen treatment of the catalyst surface, achieved both by catalyst design and by reducing the oxygen concentration, promotes the dominance of nucleophilic sites. [133][134][135][136] This phenomenon is independent of the catalyst structure and works for different systems.…”

“…142,143 The careful design and modification of the NiO-based systems by tuning the surface oxygen concentration, addition of Sn, Ti and Nb oxides, or simple variation of NiO concentration can also help to achieve a higher olefin selectivity and a higher productivity. 135,136,[144][145][146][147] Finally, a technico-economic analysis of the ethane ODH indicates its potential for industrial implementation, competitive with the SC process. The Cr-based catalysts are well-known for the propane DDH process.…”

Toward the Industrial Exploitation of the Oxidative Dehydrogenation of Ethane over a NiO-SnO2-Based Catalyst: Regime, Parametric Sensitivity, and Optimization Analysis

“…0, 0 and 0 implemented in the (petro)chemical industry. 27,28 With the aim to maintain the tube-to-particle diameter ratio below 29 Finally, the inlet flow rate (2−6 Nm 3 h −1 ) varies in a range where the pressure drop is acceptable and leads to Re p (200−1860) used during the operation of industrial wall-cooled packed-bed reactors. 27,28 2.1.1.…”

“…The calculated bed densities (ρ b ) depending on the d t / d p scenario are 75.0, 82.9, and 86.7 kg ap m r –3 , respectively. The feedstock composition and the coolant temperature (360–480 °C) are based on the operating conditions employed for developing the kinetic model for the NiO-SnO 2 -based material . Finally, the inlet flow rate (2–6 Nm 3 h –1 ) varies in a range where the pressure drop is acceptable and leads to Re p (200–1860) used during the operation of industrial wall-cooled packed-bed reactors. , …”

Evaluación de un biorreactor sólido/gas en la síntesis orgánica de propionato de isobutilo

“…involucrados en el modelo se determinan utilizando las observaciones reportadas por Kuperkar et al Los experimentos se llevaron a cabo en un biorreactor con enfriamiento en la pared a escala de laboratorio operado bajo un régimen de control cinético. Los detalles sobre el sistema experimental se pueden revisar enKuperkar et al (Kuperkar et al, 2014) El mecanismo sigue una sinergia entre los formalismos de Langmuir-Hinshelwood-Hougen-Watson y Eley-Rideal(Alvarado-Camacho et al, 2021) tomando en cuenta el mecanismo…”