Sentence examples for catalyst components from inspiring English sources
Stability is affected by both the composition and the structural characteristics of the catalyst components [2].
NiO and NiAl2O4 remain only in traces for the duration of the experiment, while Al2O3 is not changing; for these reasons, these maps are not shown here and emphasis is given on the active catalyst components.
Constrains such as the susceptibility of the catalyst components to sintering or phase transformation were also taken into account.
These characteristic features of niobium compounds as catalysts and catalyst components are discussed, their potential significance being emphasized.
Ni and Fe may act as either competing or cooperative catalyst components in the process of carbon nanotubes growth.
Properties that make zeolites versatile catalyst components are: Size and shape of the crystallites are variables in catalyst design and are determined by the synthesis conditions.
Specifically, the results suggest that the coke deposition initially takes place at the regions rich in Ni, which is the active catalyst component for the POX reaction.
For this reason, when the effectiveness of a catalyst has reached a certain low level, steps are taken to remove the poison or replenish the active catalyst component that may have reacted with the poison.
This result provides direct evidence that the most important role of the CexZryO2 promoters is to enhance the reducibility of the NiO and the formation of the active catalyst component, the metallic Ni phase.
However, Ni/Al2O3-based catalysts are usually prone to deactivation with time under POX reaction conditions for a variety of reasons; the most often reported in literature being carbon deposition on active Ni sites (metallic Ni being the active catalyst component), sintering of Ni particles and solid-state reactions involving Ni (eg, the formation of NiAl2O4 in Ni/Al2O3 catalysts)35,36.
The kinetics of carbon nanotube (CNT) synthesis by decomposition of CH4 over Mo/Co/MgO and Co/MgO catalysts was studied to clarify the role of catalyst component.
