What will effect on Raney nickel catalyst activity of doped with alginate?
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| The results show that yttria doped in nickel catalyst plays a key role in keeping the activity of the catalyst by resisting or postponing the interaction between copper and nickel. | |
Open access•Journal Article | It is shown that the Raney-type Nickel catalyst pretreatment and the impurities present in the reactants have a large impact on the catalyst surface activity. |
63 Citations | The decrease in catalytic activity of Raney nickel was likely due to an increase in average nickel crystallite size caused by hydrothermal sintering. |
27 Citations | The results obtained from these studies suggest that activity of the catalyst is affected by the oxidation state of the metal, the use of nickel(0) compounds resulting in better catalyst performance overall. |
29 Citations | The synthesized catalyst shows a better activity with respect to Raney nickel. |
8 Citations | The catalytic properties of nickel Raney (NiR) catalysts may be influenced by the phase composition of the precursors—mechanically alloyed (MA) nickel aluminides. |
| It is found that chromium-doped Raney nickel is more active than the titanium-doped catalyst. | |
46 Citations | Non-pyrophoric Raney nickel catalyst is more active than Ni/Al 2 O 3 samples especially in the side reactions. |
13 Citations | These results suggest that the activities for hydrogenation and adsorption were enhanced when the content of the residual aluminum in the catalyst was increased, and that the role of the residual aluminum in catalytic reactions can be classified into two types: to provide an increase in active sites due to formation of interstitial lattice defects, and to make a negligible contribution to the formation of active sites because of deposition of Al 2 O 3 n H 2 O on the Raney nickel catalyst. |
86 Citations | The enhancing of catalytic activity by Mo in Raney nickel is partly caused by synergetic effects between Ni and Mo, as follows from their electronic structure, and partly by material stabilization as follows from comparison with the Raney nickel (Zn). |
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What is the effect of CO2 production on alginate beads?3 answersThe effect of CO2 production on alginate beads varies depending on the specific context. In one study, it was found that CO2 can be used as a major attractant for arthropod pests, and alginate beads containing corn starch, amyloglucosidase, and Saccharomyces cerevisiae were developed to release CO2 for pest control purposes. Another study focused on the adsorption of CO2 onto alginate immobilized zeolite beads, which demonstrated higher sorption efficacy compared to plain alginate beads and zeolite alone. Additionally, alginate beads were used in biohydrogen production, where the presence of CO2 influenced the biofilm formation and hydrogen production rate. Furthermore, the production and quality of alginate by Azotobacter vinelandii were evaluated in the presence of different levels of CO2, showing both inhibitory and stimulatory effects on biomass growth and alginate production. Overall, the effect of CO2 production on alginate beads can vary depending on the specific application and context.