Hydrogen consuming

How does one distinguish between rings and double bonds This additional piece of infoi ination comes from catalytic hydrogenation expei iments in which the fflnount of hydrogen consumed is measured exactly. Each of a molecule s double bonds consumes... 

In reductions of dienes to monoenes, it is important to monitor the hydrogen consumed and to stop the reduction at the stoichiometric point few reductions will stop spontaneously. 

Hydrotreating is a hydrogen-consuming process primarily used to reduce or remove impurities such as sulfur, nitrogen, and some trace metals from the feeds. It also stabilizes the feed hy saturating olefrnic compounds. 

The thermograms of Cu reduction in silica-, alumina-, titania- and zirconia-supported catalysts show only one pe the maximum of which is reported in Table 3. The amount of hydrogen consumed by the r uction corresponds, within experimental error, to the theoretical amount required for the reaction ... 

The reaction of ADPA with acetone led to a solid product, presumably 4-(isopropylamino)diphenylamine (mp 72-76°C), with the hydrogen uptake leveling at 56 minutes. Since the product could not be analyzed by GC, the conversion was calculated from the amount of hydrogen consumed during the reaction. 

In the kinetic study, data were obtained from the amount of hydrogen consumed by the reaction over time using an automated gas uptake control system. The apparatus is designed to maintain isothermal and isobaric conditions while monitoring H2 consumption. Procedures used were as described previously.3"5... 

Case 1 in Figure 45.2 refers to a case where the reaction between S and H2 is very slow. In that case, the rate of hydrogen consumed by the reaction (i.e., the rate of the reaction) is small compared to the maximum rate of mass transfer. Thus, mass transfer feeds the liquid phase easily with dissolved hydrogen. The liquid-phase hydrogen concentration is very close to that at equilibrium given by the Henry s law ... 

The Schlenk tube was connected to a low-pressure hydrogenation apparatus fitted with a gas burette system to measure the hydrogen consumed. The Schlenk tube was flushed through three cycles (reduced pressure/ hydrogen) and then placed under an atmospheric pressure of hydrogen. The burette was filled with 200 mL of hydrogen. 

GDE s may be interesting for synthesis cells as depolarized electrodes (e.g. [48]). A hydrogen-consuming anode will work at a low potential that avoids undesired anodic oxidations (e.g. no chlorine evolution in presence of chlorides). In order to reject an excess of the electrolyte from the GDE structure, a proton-conducting membrane (Nafion ) between the GDE and the electrolyte can be used ( Hydrina , De Nora Spa. [49]). 

The quantity of hydrogen consumed within the fuel cell is... 

Compression of hydrogen consumes energy depending on the thermodynamic process. The ideal isothermal compression requires the least amount of energy (just compression work) and the adiabatic process requires the maximum amount of energy. The compression energy W depends on the initial pressure p and the final pressure pf, the initial volume V and the adiabatic coefficient y ... 

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