TAP-like reactor

We have applied our Multitrack reactor, an advanced TAP-like reactor system,23 to evaluate the number of redox-active Pt surface sites (Ptsurf redox) on Pt/A Os catalysts as a function of Pt dispersion. The number of Ptsurf redox sites was compared with the total number of Ptsurf sites determined by conventional volumetric CO chemisorption. 

We made a TAP-like reactor as an attachment for TM+ (Fig.29) to analyze the NSR reaction. A quartz tube with a 4.5mm internal diameter and a length of 3Hmm is inserted into the TAP-like reactor with TM+. The time resolution of a transient reaction analysis with TAP is lower than that with TM-t-, because the time profile of reactants and products with TAP is obtained as the result of multistcp reaction and diffusion, which arc caused by the tube reactor shape instead of the planar catalyst. The most important advantages of TAP arc to evaluate the amount of decrease of reactant gas and product quantitatively. 

The interaction of with a highly dispersed Pt/Al20s catalyst was studied at 523 K using Multitrack, a novel TAP-like reactor system. On a hydrogen reduced catalyst, initially i NO was rapidly decomposing, 3delding as main product, and only little amounts of The i NO-conversion decreased as the... 

In this study the Multitrack system, a TAP-like system [9], was used. In Figure 1 a schematical representation is given. A small reactor (7 mm inner diameter, bed height 10 mm) is located in an ultra-high vacuum system. Small amounts of reactants (lO -lO o molecules, 100 ps pulse width) can be pulsed into the reactor that typically operates at a pressure of 3 Pa. At the reactor exit the reaction products are analyzed by a quadrupole mass spectrometer. As this mass... 

The authors would like to acknowledge the contributions of several individuals for their insight and hard work in achieving the data included in this report J. Scott McCracken (TAP reactor), Kevin S. Slusser (fixed bed reactor), and Tom Borecki (catalysis synthesis). The authors would also like to thank DuPont s vinyl acetate business and manufacturing teams for allowing this work to be published. 

Fig. 3.2. Monomer burette for photopolymerisable monomers. is a reservoir containing monomer over a drying agent, e.g. CaH, with magnetic stirrer. The monomer was run into A through D which was then sealed. C is a cold finger to be filled with a mush at just above the freezing point of the liquid in A, so that the condensate drips into the burette B. Any excess is returned to A via which, like and T, should be a PTFE tap. The rig should be covered in black cloth up to and 7. The latter is essential, because in its absence the monomer in A will polymerise on all the glass surfaces, even if A is kept dark. The reactor in which the monomer is required, or any phials to be filled, are attached below T. ...

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