Since then, at the Royal Institution, where alone sufficient means are available for the prosecution of these researches, the same method has bridged over the space, impassable by former methods, between the temperature of liquid air and that of liquid hydrogen and helium, thus proving itself a...
It is estimated that the cost of hydrogen production and liquefaction ranges between 0.979 $/kg H2 and 2.615 $/kg H2 depending on the model. The effect of geothermal water temperature on the cost of hydrogen production and liquefaction is investigated. The results show that the cost of ...
It was found that the influence of temperature on coal liquefaction yields and product distributions varies with the amount of donatable hydrogen. Total coal conversion increases with temperature, when very high tetralin/coal ratios are used On the contrary, when 1/1 ratio is used, conversion ...
These methods are based on the use of the Joule-Thomson effect, combined with a regenerating heat exchange after the gas has been cooled below its conversion temperature by liquid air or hydrogen. Since these processes are essentially non-reversible, the efficiency of the method is very low: ...
Optimizations are conducted to identify the lowest specific energy consumption (SEC) of the hydrogen liquefaction process with different conversion methods. The three conversion methods are compared in terms of the temperature distribution along the process, the conversion-heat-associated exergy and SEC. ...
The main challenges in utilizing liquid hydrogen are its extremely low temperature and ortho- to para-hydrogen conversion. These two characteristics have led to the urgent development of hydrogen liquefaction, storage, and transportation. In addition, safety standards for handling liquid hydrogen must ...
Liquefaction of Helium by an Adiabatic Method without Pre-cooling with Liquid Hydrogen Not Available P Kapitza - 《Nature》 被引量: 9发表: 1934年 Enhancement of the Liquefaction Rate in Small-Scale Helium Liquefiers Working Near and Above the Critical Point Low-temperature research laboratories with...
ydrogen-donating abilities of coal liquefaction residues (CLR) were evaluated in the temperature range of 380-450°C with four molecular probes such as bibenzyl, trans-stilbene, 9-benzylphenanthrene and benzophenone for the purpose of effective utilization of donatable hydrogens in CLR. CLR stabiliz...
The present invention relates to a catalytic process for converting a solid carbonaceous material, such as coal, to a liquid product in the presence of hydrogen. More particularly, this invention relates to a coal liquefaction process wherein a mixture of coal, bottoms, solvent and a sulfiding ...
Hydrogen may be stored compactly as a cryogenic liquid at low pressure and temperature, i.e. 20 K at atmospheric pressure. Gaseous hydrogen at normal temperature may be liquefied on a small scale using a cryogenic refrigerator (cryocooler). Stirling refrigerators are well suited to this duty. ...