Re: Catalyst (Control Duology) Download Pdf
Stephanie Dejoode
Bi-functional catalysts were prepared using HY zeolites with various SiO2/Al2O3 ratios for acidic function, NiW for metallic function, and K for acidity control. 1-Methylnaphthalene was selected as a model compound for multi-ring aromatics in heavy oil, and its selective ring opening reaction was investigated using the prepared bi-functional catalysts with different levels of acidity in a fixed bed reactor system. In NiW/HY catalysts without K addition, the acidity decreased with the SiO2/Al2O3 mole ratio of the HY zeolite. Ni1.1W1.1/HY(12) catalyst showed the highest acidity but slightly lower yields for the selective ring opening than Ni1.1W1.1/HY(30) catalyst. The acidity of the catalyst seemed to play an important role as the active site for the selective ring opening of 1-methylnaphthalene but there should be some optimum catalyst acidity for the reaction. Catalyst acidity could be controlled between Ni1.1W1.1/HY(12) and Ni1.1W1.1/HY(30) by adding a moderate amount of K to Ni1.1W1.1/HY(12) catalyst. K0.3Ni1.1W1.1/HY(12) catalyst should have the optimum acidity for the selective ring opening. The addition of a moderate amount of K to the NiW/HY catalyst must improve the catalytic performance due to the optimization of catalyst acidity.
I think it's good. Beautiful clean to edge of breakup with subtle differences depending on tone knob settings, gain settings and of course amp model. Also, excellent response to tone controls. No harsh or spikey treble.
For professional use Catalyst is suited more for owners of Helix, Headrush, Kemper, Fractal, and want a guitar speaker power cab. With emergency fall back mode using Catalyst standalone. And work guitar Vol/Tone controls for Rhythm/Solo-old school
100 HX. I originally bought the 60, but I own a Nectar Pacer MIDI foot controller that I use with Logic and Amp Sims. The only way I was going to get it to work was to buy a MIDI host box that cost more than the price difference between the amps. With the switchable output I can sit in front of a 100W amp and enjoy playing, without waking up the kids.
6 amps, 6 reverbs, 18 effects. Effects loop. MIDI control. XLR out.....and so on. Everyone has a gripe about foot pedal control - and, if I didn't have the Pacer I would agree. But - the Catalyst Edit app is so very useful. I hit my loop pedal, play in a section of a song, dial in a sound, save it as a preset and that's it! My only qualm is the absence of bluetooth - I'd love to have a tablet on my mic stand and change my presets wirelessly.
Check that control traffic is flowing from a Supervisor forwarding ASIC perspective between the Supervisor forwarding ASIC on the active Supervisor and the Line card stub ASIC on the Line card via the OCI interfaces.
Check that control traffic is flowing from a Line card stub ASIC perspective between the Line card stub ASIC on the Line card and the Supervisor forwarding ASIC on the active and standby Supervisors via the OCI interfaces.
During IEEE 802.1Xauthentication, the router or the supplicant can initiate authentication. Ifyou enable authentication on a port by using the authentication port-control auto interface configuration command, the routerinitiates authentication when the link state changes from down to up orperiodically if the port remains up and unauthenticated. The router sends anEAP-request/identity frame to the supplicant to request its identity. Uponreceipt of the frame, the supplicant responds with an EAP-response/identityframe.
Implementing Paris Climate Accord is inhibited by the high energy consumption of the state-of-the-art CO2 capture technologies due to the notoriously slow kinetics in CO2 desorption step of CO2 capture. To address the challenge, here we report that nanostructured TiO(OH)2 as a catalyst is capable of drastically increasing the rates of CO2 desorption from spent monoethanolamine (MEA) by over 4500%. This discovery makes CO2 capture successful at much lower temperatures, which not only dramatically reduces energy consumption but also amine losses and prevents emission of carcinogenic amine-decomposition byproducts. The catalytic effect of TiO(OH)2 is observed with Raman characterization. The stabilities of the catalyst and MEA are confirmed with 50 cyclic CO2 sorption and sorption. A possible mechanism is proposed for the TiO(OH)2-catalyzed CO2 capture. TiO(OH)2 could be a key to the future success of Paris Climat e Accord.
A few studies have shown that inorganic materials could be used as catalysts for CO2 capture. Our group have showed that FeOOH and TiO(OH)2 could be used as catalytic supports to reduce the activation energy of the NaHCO3 decomposition reaction and then enhance the decomposition rate11,12. Idem et al. reported that H-ZSM and γ-Al2O3 could be used to accelerate the amine based solvent regeneration and thus reducing the heat duty for amine regeneration13,14. Bhatti et al.15 recently reported an inspiring finding that transition metal oxides could affect spent monoethanolamine (MEA) regeneration. Two of those materials, MoO3 and V2O5, were found to improve desorption rates substantially because, in fact, they react and dissolve in the CO2-rich MEA solvent. For this reason, they cannot act as a classic, reusable catalyst. The other oxides investigated in that work, including TiO2, had only marginal effects.
Q.L. contributed to the idea, built the setup, synthesized catalyst, performed CO2 capture, BET, XRD, SEM, TEM, TGA FT-IR, and Raman experiments, analyzed data and wrote the manuscript. S.T. performed Raman, assisted data analysis and manuscript writing. M.A.A. contributed towards the project idea and catalyst synthesis. H.C. assisted the setup building, CO2 capture performance and cycle tests. A.G.R., H.A. and M.R. helped the data analysis and manuscript writing. M.F. was involved in the project idea, supervision, results analysis and manuscript writing.
may you advise on Cisco Flow-control best practice for Nexus 55xx and Catalyst 65xx connection.we have seen some difference in flow-control configuration of Switch interfaces and not sure if this is ok ?
2 x Nexus 5596UP (L2 only) and Cisco Catalyst 6504(Layer 3) core with 10G int to the 5596UPs
The O2 sensor behind the catalyst monitors O2 storage capacity; that being said, the ECM/PCM factors in readings of both the front and rear (upstream and downstream) sensors to determine proper exhaust stream composition.
Inducement strategies are required by the Environmental Protection Agency (EPA) and Air Resources Board (ARB) to ensure the rapid repair of various failures in the engine emissions control system. The EPA/ARB requires control actions that Limit Engine Performance (Engine Derate) and prompt Warning Indicators (Lamps, Messages, Audible Alarms) while operator inducements are active.
In this study, selected variables of the CCVD process were studied to obtain CNFs with high yield and purity using a Ni/HAp catalyst and methane as the carbon source. We focused on the catalyst reduction conditions in the CCVD process because they are rarely reported in the literature. Our results demonstrate that the optimization of the temperature and time of catalyst reduction is crucial for high-yield CNF synthesis. For optimal reduction conditions, the kinetics of CNF growth were studied to evaluate the susceptibility of Ni/HAp to deactivation.
The morphologies of the as-grown and purified CNFs, HAp, and as-prepared Ni/HAp catalyst were studied using scanning electron microscopy (SEM) on an EVO LS15 Zeiss microscope. The arrangement of graphene layers in the CNFs was determined by transmission electron microscopy (TEM) using a FEI Tecnai G2 20 X-TWIN microscope, which was operated at an acceleration voltage of 200 kV. The sample was prepared by ultrasonic dispersion in ethanol, and a few drops of the suspension were placed onto a copper microgrid covered with a perforated carbon film. The average CNF diameter was determined based on the measurement of 50 nanofibers for each sample. Thermogravimetric analysis (TGA) was performed on the purified CNFs using a TGA/DSC1 Mettler Toledo (thermobalance).
The morphology of the as-prepared Ni/HAp catalyst was very similar to that of the support (Fig. S1). The HAp powder consists of agglomerated spherical nanoparticles, and their sizes are preserved in the Ni/HAp catalyst. SEM-EDX investigation of the reduced Ni/HAp catalyst revealed that nickel was homogeneously distributed on the surface of the support particles (Fig. S2).
An increase in the reduction temperature can lead to the migration of nickel particles on the support surface and formation of larger agglomerates, which results in larger CNF diameters. However, the catalyst, operating conditions, and reactant gas composition affect the CNF diameters [32]. In our study, the most suitable temperature for Ni/HAp reduction was determined to be 650 C, which results in maximum reduction of the NiO phase.
Figure 6 shows the SEM images of the obtained CNFs at different Ni/HAp reduction times. After 10 min of reduction, the CNFs were heterogeneously dispersed on the catalyst surface and characterized by a broad size distribution, which ranged from short to several micrometers in length (Fig. 6a). An increase in the reduction time to 60 min produced a strong entangled network of nanofibers that were more than a dozen micrometers in length (Fig. 6b). A dense network of entangled nanofibers was observed when Ni/HAp was reduced at 650 C for 2 h. The obtained results indicate that a reduction time of 2 h is optimal for CNF production over the Ni/HAp catalyst.
Thermodynamic reaction control or kinetic reaction control in a chemical reaction can decide the composition in a reaction product mixture when competing pathways lead to different products and the reaction conditions influence the selectivity or stereoselectivity. The distinction is relevant when product A forms faster than product B because the activation energy for product A is lower than that for product B, yet product B is more stable. In such a case A is the kinetic product and is favoured under kinetic control and B is the thermodynamic product and is favoured under thermodynamic control.[1][2][3]
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