Reactor material and gas dilution effects on the performance of miniplant-scale fluidized-bed reactors for oxidative coupling of methane

Silica material variation for the MnxOy-Na2WO4/SiO2

“…100 mg catalyst diluted in 1.5 ml quartz sand and the feed gas composition of CH 4 :O 2 :N 2 = 4:1:4 was used for the experiments. [20,29,31,32,38,43], it has been also presented similar or lower C 2 yield values (5-16%) in some publications [28,33,48,49]. The scattering in catalytic activity results can be clearly seen in Figure 12 However the reason of this fact can be explained that catalytic activity results for the OCM depends strongly on the different factors, e.g.…”

“…The most vital challenge for the OCM is the stability of the catalyst. Among the known OCM catalysts, Mn x O y -Na 2 WO 4 /SiO is a promising one [17,18] in the literature for the commercialization of an industrial process [19][20][21][22][23][24][25][26][27][28]. Moreover, its catalytic performance (CH conversions of 20-30% at C 2 selectivities of approximately 70-80%) is superior to the most OCM catalysts.…”

Oxidative coupling of methane over Mn–Na2WO4/SiO2 catalyst with continuous supply of alkali chloride vapor

“…To date, many studies to improve the performance of these types of catalysts have been carried out, investigating the effects of the preparation method employed, component substitution, and use of promoters [11]. In addition, studies investigating the large-scale application of these catalysts have been carried out [12,13]. Furthermore, fundamental studies have been carried out to elucidate the reaction mechanism over these catalysts.…”

Recognition of Oxidative Coupling of Methane Reactor Performance Patterns

“…These will be reflected, e.g., in tuning the reaction conditions and selecting a proper catalyst with the aim of emboldening the desired surface reactions [5,6] or in better designing the coupled gas-phase reaction chamber and the OCM catalytic bed, resulting in an efficient ethane to ethylene conversion [4]. Similarly, a better understanding of the contribution of oxygen on the desired and undesired reactions can be an asset in the design and utilization of various reactor feeding policies such as membrane reactor [7,8], fluidized-bed membrane reactor [9], and chemical-looping reactor [3]. In all of these analyses and designs, the interactive thermal reaction aspects of this complicated gas-catalytic reaction system should be also taken into consideration.…”