Hydrogen liquefied gases

Liquefied gas fractions (propane, propylene, butanes, butenes) that will be able to provide feedstocks to units of MTBE, ETBE, alkylation, dimerization, polymerization after sweetening and/or selective hydrogenation. 

Dermal Effects. Peeling of the facial skin was reported in one patient following probable exposure to 8-16 ppm of hydrogen sulfide, which was believed to be due to the irritant effect of the gas (Tvedt et al. 1991a, 1991b). ATSDR (1994) indicates that direct contact with liquefied hydrogen sulfide gas can cause frostbite. 

Swain, M.R., Shriber, J., and Swain, M.N., Comparison of hydrogen, natural gas, liquefied petroleum gas, and gasoline leakage in a residential garage, Energ. Fuels, 12, 83,1998. 

Hydrogen sulfide is stable and stored as a compressed, liquefied gas in aluminum or stainless steel cylinders. 

Demirbas, A. 2002. Enel properties of hydrogen, liquefied petroleum gas (LPG), and compressed natural gas (CNG) for transportation. Energy Sources 24 601-610. 

Hydrogen bromide gas may be produced by combustion of hydrogen in bromine vapor at 37.5°C using a catalyst such as platinized asbestos or platinized silica gel. Unreacted free bromine is removed from the product by passing the gaseous product mixture over hot activated charcoal. Hydrogen bromide formed may be absorbed in water to obtain the acid or may be cooled and liquefied for shipment in cylinders. 

Sulfur compounds/natural gas, hydrogen, liquefied petroleum gas (LPG) Zeolite... 

HYDROGEN, LIQUEFIED Liquid Hydrogen, para Hydrogen Flammable Compressed Gas 0 4 0... 

Hydrogen, Liquefied — Fire Hazards Flash Point (deg. F) Not pertinent Flammable Limits in Air (%) 4.0 - 75.0 Fire Extinguishing Agents Let fire burn shut off gas supply Fire Extinguishing Agents Not To Be Used Carbon dioxide Special Hazards of Combustion Products Not pertinent Behavior in Fire Burns with an almost invisible flame Ignition Temperature (deg. F) 1,065 ... 

Butane can be used for the manufacture of maleic acid (thence to maleic anhydride), from which tetrahydrofuran is made by hydrogenation. Liquefied petroleum gas is also a feedstock for aromatics production (Fig. 1). 

In the cryogenic partial condensation process, the feed gas is cooled to 85 K, which condenses the bulk of the carbon monoxide and methane. Uncondensed hydrogen-rich gas is cooled further to 70 K to liquefy additional carbon monoxide. These liquid fractions are degassed and then warmed to obtain high-purity carbon monoxide gas. A cryogenic distillation process can produce ul-trapure carbon monoxide. 

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