How can it be recovered through steam?
doc-7679
Consequently, steam reforming typically employs an excess of H
2O. Additional hydrogen can be recovered from the steam by use of carbon monoxide through the water gas shift reaction, especially with an iron oxide catalyst. This reaction is also a common industrial source of carbon dioxide:
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doc-17355
Zinc chloride is often added to lumber as a fire retardant and can be used as a wood preservative. It is also used to make other chemicals. Zinc methyl (Zn(CH3)
2) is used in a number of organic syntheses. Zinc sulfide (ZnS) is used in luminescent pigments such as on the hands of clocks, X-ray and television screens, and luminous paints. Crystals of ZnS are used in lasers that operate in the mid-infrared part of the spectrum. Zinc sulfate is a chemical in dyes and pigments. Zinc pyrithione is used in antifouling paints.
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doc-7678
This reaction is favored at low pressures but is nonetheless conducted at high pressures (2.0  MPa, 20 atm or 600 inHg). This is because high-pressure H
2 is the most marketable product and Pressure Swing Adsorption (PSA) purification systems work better at higher pressures. The product mixture is known as "synthesis gas" because it is often used directly for the production of methanol and related compounds. Hydrocarbons other than methane can be used to produce synthesis gas with varying product ratios. One of the many complications to this highly optimized technology is the formation of coke or carbon:
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doc-7683
In its turn, under anaerobic conditions, the ferrous hydroxide (Fe(OH)
2 ) can be oxidized by the protons of water to form magnetite and molecular hydrogen. This process is described by the Schikorr reaction:
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doc-7682
Under anaerobic conditions, iron and steel alloys are slowly oxidized by the protons of water concomitantly reduced in molecular hydrogen (H
2). The anaerobic corrosion of iron leads first to the formation of ferrous hydroxide (green rust) and can be described by the following reaction:
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doc-9163
The attainment of high efficiency in blue LEDs was quickly followed by the development of the first white LED. In this device a Y
3Al
5O
12:Ce (known as "YAG") phosphor coating on the emitter absorbs some of the blue emission and produces yellow light through fluorescence. The combination of that yellow with remaining blue light appears white to the eye. However using different phosphors (fluorescent materials) it also became possible to instead produce green and red light through fluorescence. The resulting mixture of red, green and blue is not only perceived by humans as white light but is superior for illumination in terms of color rendering, whereas one cannot appreciate the color of red or green objects illuminated only by the yellow (and remaining blue) wavelengths from the YAG phosphor.
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doc-7448
Le origini di Deep house possono essere ricondotte al produttore Chicago Le registrazioni relativamente jazzistiche e animate di Mr Fingers,"Mystery of Love" (1985) e "Can You Feel It"? (1986). Secondo l' autore Richie Unterberger, ha spostato la musica house lontano dalle sue "tendenze postume verso il suono soulful lussureggiante" della musica disco dei primi tempi.
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doc-7674
A molecular form called protonated molecular hydrogen (H+
3) is found in the interstellar medium, where it is generated by ionization of molecular hydrogen from cosmic rays. This charged ion has also been observed in the upper atmosphere of the planet Jupiter. The ion is relatively stable in the environment of outer space due to the low temperature and density. H+
3 is one of the most abundant ions in the Universe, and it plays a notable role in the chemistry of the interstellar medium. Neutral triatomic hydrogen H3 can only exist in an excited form and is unstable. By contrast, the positive hydrogen molecular ion (H+
2) is a rare molecule in the universe.
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doc-10213
Montana è stata una destinazione per la sua pesca di trote di classe mondiale fin dagli anni Trenta. Pesca a mosca per diverse specie di trote autoctone e introdotte nei fiumi e laghi è popolare sia per i residenti e turisti in tutto lo stato. Montana è la casa della Federazione di Fly Fishers e ospita molte delle organizzazioni conclave annuali. Lo stato è caratterizzato da una robusta pesca ricreativa di trote lacustri e salmoni kokanee ad ovest, mentre nelle acque del Montana orientale si trovano pesci gatto e pesci pagaia. Il film di Robert Redford del 1992 del romanzo di Norman Mclean, A River Runs Through It, è stato girato nel Montana e ha portato l' attenzione nazionale per la pesca a mosca e lo stato.
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doc-9193
In the US, one kilowatt-hour (3.6 MJ) of electricity currently causes an average 1.34 pounds (610 g) of CO
2 emission. Assuming the average light bulb is on for 10 hours a day, a 40-watt bulb will cause 196 pounds (89 kg) of CO
2 emission per year. The 6-watt LED equivalent will only cause 30 pounds (14 kg) of CO
2 over the same time span. A building’s carbon footprint from lighting can therefore be reduced by 85% by exchanging all incandescent bulbs for new LEDs if a building previously used only incandescent bulbs.
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doc-1407
Anche i gemelli (1988), una commedia con Danny DeVito, hanno avuto successo. Total Recall (1990) ha nettato Schwarzenegger 10 milioni di dollari e il 15% del film lordo. Scrittura di fantascienza, il film è basato sul racconto breve di Philip K. Dick "We Can Remember It for You Wholesale". Kindergarten Cop (1990) lo riunì con il regista Ivan Reitman, che lo diresse in Twins. Schwarzenegger ha avuto una breve incursione in regia, prima con un episodio 1990 della serie TV Racconti dalla cripta, dal titolo "The Switch", e poi con il 1992 Natale telemovie in Connecticut. Da allora non ha più diretto.
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