Hydrogen consumption for

Relationship between the residual aromatics content, the hydrogen partial pressure, and the chemical hydrogen consumption (for a SR gas oil). 

The hydrogen consumption for the hydrogenation of WVGS 13421 and WVGS 13423, Table 6, qualitatively indicates the relative reactivity of the coals and their products. As discussed previously, prior to and after each experiment, the tetralin was analyzed chromatographically to determine the relative tetralin and... 

Fig. 10.12 S imultaneous monitoring of the time-dependent UV/ visible spectrum at 441 nm (maximum of the catalyst extinction) and hydrogen consumption for the hydrogenation of COD with [Rh(DIOP)COD]BF4 Conditions 0.02 mmol precatalyst 0.33 mmol COD 20.0 mL methanol 25.0°C 1.013 bar total pressure.

Fig. 10.21 Hydrogen consumption for the hydrogenation of (Z)-3-N-acetylamino-3-(phe-nyl)-methyl propenoate with [Rh((R,R)-Et-DuPHOS)(MeOH)2]BF4 in 7-PrOH (59% ee) and (Z)-2-benzoylamino-3-(3,4-dimethoxy...

K/Mi Mo04 catalyst showed the sharpest peak for the first reduction step. The total hydrogen consumption for all samples was comparable, and was in agreement with the theoretical value of 13.96 mmol/g assuming the final species to be MnO and Mo. 

Figures 2a-d show plots of catalyst potential and substrate concentration (GLC) versus hydrogen consumption for the hydrogenation with formamidine acetate (a), with dicyandiamide (b), with guanidine acetate (c) and without modifier (d). This type of presentation allows to standardize and to compare reactions with different reaction times, which are indicated at the upper edge of the graphs. As expected by analogy with the results reported for the unmodified nickel catalysts (ref.9), no dehalogenation is observed as long as either nitro compounds or partially reduced intermediates are present in solution.

Table 5-2 Hydrogen Consumption for Various Heavy Feedstocks... 

Table 5-3 Additional Hydrogen Consumption for Nitrogen Compounds and Metals in Feedstocks... 

For the process engineering studies, these severity definitions were broadened, based on the hydrogen consumption required. If the hydrogen consumption for the whole oil hydrotreater was over 2750 SCF/bbl, the severity was referred to as high. If the hydrogen consumption was between 1750 and 2750 SCF/bbl, the severity was referred to as intermediate. If the hydrogen consumption was 1750 SCF/bbl or lower, the severity was referred to as moderate. 

Figure 4. Product aromatic content vs. hydrogen consumption for Illinois H-coal, Wyodak H-coal, and SRC-II syncrudes...

Figure 5. Oxygen removal vs. hydrogen consumption for Co-Mo (oxygen...

Coliquefaction with coal [69-71] in the process of coal and waste plastics coliquefaction, the hydrogen atoms contained in plastics transfer from plastics to coal, leading to partial or even total liquefaction of coal. On the one hand, as hydrogen donors, plastics can reduce the hydrogen consumption for coal coliquefaction dramatically. On the other... 

Figure 3. Comparison of structures and hydrogen consumption for four coals (11)...

Figure 1. Conversion and chemical hydrogen consumption for hydrodesulfurization of residuals with H-Oil...

TPR profiles of the cobalt containing perovskites are displayed in Fig. 1. All the perovskites showed similar reduction profiles consisting of two sets of peaks at approximately 633 and 833 K. It can be observed that especially for LaCoO, and PrCoO, the second reduction peak shifts to higher temperatures. For example, the reduction peak for SmCoO, at ca. 785 K is observed at 844 K for LaCoO,. In all cases the hydrogen consumption for the first reduction step (peak at ca. 633 K) was always approximately half of the hydrogen consumption obtained for the second reduction step (peak at 833 K). Careful thermogravimetric reduction experiments (not shown here) demonstrated that the first step is a 1 electron reduction process whereas the second step is a 2 electrons reduction process. 

Figure 3 Bed temperature and hydrogen consumption for Co/ZnO catalyst in a fluidised bed...

The spillover of the surface hydrogen from active phase to the AI2O3 support was experimentally demonstrated by McGarvey and Kasztelan. " They observed that the hydrogen consumption for a mechanical mixture of the M0/AI2O3... 

For stoichiometric reasons, the hydrogen consumption for the reduction of haematite into wiistite is only about half of the hydrogen used for reduction of the wiistite into metallic iron. As a consequence of these thermod5mamic and stoichiometric restraints, only roughly 50% of the hydrogen (1/3+1/2- l/3=l/2) introduced at the bottom of the shaft furnace is used for the reduction process, whereas the rest is found -diluted with steam - in the top gas [495]. 

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