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Hydrogen yields from

Bromine is as effective as SF6 in suppressing the hydrogen yield from HBr and it is evident100 that, at low [Br2] [HBr] ratios, the reaction... [Pg.170]

Fig. 6. Effects of scavengers on the hydrogen yields from y-irradiated liquid HC1. +Br2, Cl2 O C2H4. Concentrations of Cl2 and C2H4 have been multiplied by h+ci2/ h+bt2 and kH+C2 J Ah+b,2 respectively (taken from the data of refs. 107,117). [Pg.173]

In other experiments varying concentrations of bromine were added to liquid HC1, which contained a fixed amount of HBr. At —79 °C the rate coefficients of reactions (13) and (14) are both much larger than k22. Thus kinetic analysis of the hydrogen yields from these solutions leads to a determination of k13/k1A.. The... [Pg.173]

RADIATION-RESISTANT GROUPS. Aromatic groups have long been known to give significant radiation resistance to organic molecules. There was early work on the hydrogen yields from cyclohexane (G=5) and benzene (G=0.04) in the liquid phase, and of their mixtures, which showed a pronounced protective effect. [Pg.5]

As an example of the use of modified CPS, a catalyst evaluation study was performed comparing a Ni-tolerant catalyst with a conventional catalyst. The two catalysts were impregnated with 1000 ppm Ni and 1700 ppm V and deactivated by standard CPS and the low oxygen last cycle CPS procedure. Figures 10 and 11 display the MA coke and hydrogen yields from the two catalysts under the two CPS conditions. [Pg.180]

Hydrogen yield from the hemicellulose solution was about 70% of the stoichiometric potential. Lower performance was due to the higher content of oligomeric material, which is more difficult to reform. [Pg.1584]

The hydrogen yield from crude glycerin was 18 g per 100 g of the feedstock, which corresponds to 76% of the stoichiometric potential. If the steam reforming were followed by a water-gas shift process or a higher amount of steam were used in the reforming stage, the hydrogen yield could increase above 90%. [Pg.1584]

Alcohols in Water. The intermolecular H2 elimination process observed in the 185 nm photolysis of liquid t-butanol (135,136) already suggests a strong interaction between the excited alcohol molecule and its surroundings. As early as 1913 Berthelot and Gaudechon (21d) reported that the hydrogen yield from pure ethanol was higher than that of its aqueous solutions. Similar phenomena... [Pg.77]

Ottova et al. looked at two-compartment semiconductor-septum electrochemical photovoltaic cells with cadmium selenide and cadmium selenide telluride for water photolysis [126], They used cells consisting of two chambers separated by a CdSe or CdSe/CdTe bipolar electrode. The bipolar electrodes were prepared by painting a CdSe slurry on a metal substrate or by ultrasound-aided electrodeposition from CdSe solution in ZnCl2. The photoresponse (voltage and current output) and hydrogen yield from photo-induced electrolysis of H20 in the dark chamber of the cell were evaluated as a function of CdSe preparation method. The ultrasound-aided deposition technique gave excellent coatings of CdSe. [Pg.244]

Fig. 8.8. Hydrogen yields from visible light ( 400 nm) photolysis of solutions containing 500 mg/lTiO2/RuO2(0.1%) doped with 40 mg/1 Pt, pH = 4.5 adjusted with HC1 sensitizer concentration ... Fig. 8.8. Hydrogen yields from visible light ( 400 nm) photolysis of solutions containing 500 mg/lTiO2/RuO2(0.1%) doped with 40 mg/1 Pt, pH = 4.5 adjusted with HC1 sensitizer concentration ...
Figure 3. Effect of carbon tetrachloride concentration on the hydrogen yields from pure isopropyl alcohol (Curve A) and from water containing 1 mole % isopropyl alcohol (Curve B)... Figure 3. Effect of carbon tetrachloride concentration on the hydrogen yields from pure isopropyl alcohol (Curve A) and from water containing 1 mole % isopropyl alcohol (Curve B)...
Table I. Hydrogen Yields from Water Vapor Containing Isopropyl Alcohol and Propylene"... Table I. Hydrogen Yields from Water Vapor Containing Isopropyl Alcohol and Propylene"...
Hydrogen Yields from Water-Isopropyl Alcohol Mixtures. Figure 1 shows that both water and isopropyl alcohol contribute to the total hydrogen yield, and the linear dependence of G(H2)t on the fraction of energy absorbed by each component may be expressed by the relationship... [Pg.257]

Figure 1. Effect of naphthene content on the hydrogen yield from reforming refinery blends. Figure 1. Effect of naphthene content on the hydrogen yield from reforming refinery blends.
In attempts to find a suitable chemical dosimeter, both the nitrogen yield from the irradiation of nitrous oxide (7,8) and the hydrogen yield from the irradiation of ethylene (3, 12) have been used to measure the doses absorbed in gases. We have irradiated both of these gases and, using the dose from the calorimetry, we have measured the yields at very high dose rates. [Pg.541]

Ethylene Irradiations. The hydrogen yields from single pulse irradiations of ethylene are given in Table III. The hydrogen yields vary with pressure from G(H2) = 1.9 at 1 atm. to G(H2) = 1.0 at 10 atm. At... [Pg.548]

Table III. Hydrogen Yields from Ethylene Irradiations... Table III. Hydrogen Yields from Ethylene Irradiations...
Figure 10-23. Gaseous product yields as function of temperature for the stand-alone catalytic reformation. Maximum possible hydrogen yield from isooctane is 9, as shown by the straight dashed line. Figure 10-23. Gaseous product yields as function of temperature for the stand-alone catalytic reformation. Maximum possible hydrogen yield from isooctane is 9, as shown by the straight dashed line.
Thus, the maximum possible hydrogen yield from isooctane is ) h2 = 9, and the maximum possible carbon monoxide (CO) yield from isooctane is ) co = 8. [Pg.703]

Figure 10-27. Hydrogen yield as function of temperature for various system eonfigurations plasma preproeessing, plasma postproeessing, pure eatalysis. Maximum possible hydrogen yield from isooetane equals 9 and is represented by a straight dashed line. Figure 10-27. Hydrogen yield as function of temperature for various system eonfigurations plasma preproeessing, plasma postproeessing, pure eatalysis. Maximum possible hydrogen yield from isooetane equals 9 and is represented by a straight dashed line.
Shown in Figure VII is the ultimate hydrogen yield from the various feedstocks. This is calculated as the sum of the hydrogen yield and carbon... [Pg.342]

Figure 32.2 Hydrogen yield from 1 mol C Hm (here C14H30) in relation to the steam-to-carbon ratio and oxygen-to-carbon ratio for reforming. Methane concentrations were determined using an equilibrium calculation assuming a WGS reaction and methanation at 1023 K. In order to extend the hydrogen yield, a WGS reactor operated in equilibrium at 573 K was considered. An... Figure 32.2 Hydrogen yield from 1 mol C Hm (here C14H30) in relation to the steam-to-carbon ratio and oxygen-to-carbon ratio for reforming. Methane concentrations were determined using an equilibrium calculation assuming a WGS reaction and methanation at 1023 K. In order to extend the hydrogen yield, a WGS reactor operated in equilibrium at 573 K was considered. An...
Table 1. Literature Values of Hydrogen Yields from the 0... Table 1. Literature Values of Hydrogen Yields from the 0...

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Hydrogen yields from cyclohexane solutions

Yields from hydrogen-chloride

Yields from hydrogen-chloride catalyzed alkylation

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