39results about How to "Reduce hydrogen partial pressure" patented technology

A breathable downhole fiber optic cable is provided having an outer protective tube; a fiber optic tube having a plurality of optical fibers contained therein; at least one annulus disposed between the outer protective tube and the fiber optic tube; and at least one path, extending through the length of the fiber optic cable, which provides a channel for a purge gas to flow for removing a second gas, such as hydrogen, from the fiber optic cable.

The invention relates to the field of hydrogen preparation and purification, and provides a method for providing high-purity hydrogen. The method comprises the following steps: (1) carrying out a contact reaction on an organic liquid hydrogen storage raw material and a dehydrogenation catalyst to obtain a hydrogen-containing dehydrogenation reaction product; (2) cooling the hydrogen-containing dehydrogenation reaction product to obtain a liquid product and a hydrogen-rich gas product, and collecting the liquid product; (3) allowing the hydrogen-rich gas to make contact with hydrogen storage alloy so as to obtain hydrogen-containing alloy, and collecting non-adsorbed gas, wherein the hydrogen storage alloy is magnesium A2B type hydrogen storage alloy; and (4) heating the hydrogen-containingalloy to release hydrogen so as to obtain high-purity hydrogen. The method provided by the invention not only can produce high-purity hydrogen with a purity of 99.999% or above, but also can reduce the hydrogen partial pressure of organic liquid dehydrogenation, promote the dehydrogenation reaction of organic liquid, reduce reaction temperature, improve reaction selection and lower operation costthrough the 100% selectivity of the hydrogen storage alloy to the hydrogen reaction.

The invention relates to the field of hydrogen energy, and discloses a high-purity hydrogen providing system, a movable hydrogen supply system and a distributed hydrogen supply device. The high-purityhydrogen providing system comprises an organic liquid hydrogen storage raw material storage and supply device configured to store an organic liquid hydrogen storage raw material and provide the organic liquid hydrogen storage raw material for a dehydrogenation reactor, an after-dehydrogenation liquid storage device configured to store a liquid product that is obtained after the organic liquid hydrogen storage raw material is dehydrogenated, a dehydrogenation reactor device configured to perform a dehydrogenation reaction on the organic liquid hydrogen storage raw material under the action ofa dehydrogenation catalyst, a cooling and separating device configured to separate dehydrogenation reaction products into a hydrogen-rich gas product and the liquid product, a hydrogen storage and supply device configured to perform contact hydrogen adsorption on the hydrogen-rich gas and a hydrogen-storage alloy at low temperature and low temperature and perform heating dehydrogenation after adsorption saturation, an optional purging device and a hydrogen supply unit. The high-purity hydrogen providing system can produce high-purity hydrogen and can use organic liquid as the hydrogen storageraw material, thereby solving the problems of high hydrogen transportation cost, low hydrogen storage density and poor safety.

The present invention relates to a method for dehydrogenating alkane, the method comprising: a step for dehydrogenating propane by supplying hydrogen, steam, and a supply gas stream including a hydrocarbon to be dehydrogenated to a dehydrogenation reactor, the dehydrogenation step being repeated for 5 sets or more, the dehydrogenation reactor being provided with a two-stage reaction raw material heater connected in parallel that heats the supply gas stream supplied to each reactor, and the steam being supplied divided among the reactors respectively that are used for the 5 sets or more of reaction steps; and a step for cooling and compressing a product gas stream of the previous step, passing the product gas stream through a cooling box to rapidly cool the product gas stream, and recovering a product by separating and purifying the product gas stream that has passed through the cooling box.

The invention belongs to the technical field of chemical engineering and provides a system for hydrogen purification and wax oil hydrogenation coupling in hydrogen from coal. The system comprises a membrane separation based carbon dioxide separation unit in hydrogen from coal, a hydrogen purification unit, a wax oil hydrogenation refining unit and an oil-gas separation unit. By adopting the system, firstly, carbon dioxide in reforming gas of the hydrogen from coal is separated out by using a two-stage carbon membrane separator, then, residual permeate gas of a first-stage carbon membrane is mixed with circulating hydrogen from a hydrogenation unit, a mixture enters a hydrogen membrane separator, a small quantity of the carbon dioxide and sulfuretted hydrogen in the hydrogen as a product are removed, the product enters the wax oil hydrogenation refining unit for hydrogenation, finally, oil-gas separation is performed, and the circulating hydrogen enters the hydrogen membrane separator.The system provided by the invention can realizes high coupling of hydrogen purification and utilization, lowers the investment and running costs of the hydrogen purification unit as well as the hydrogenation partial pressure at the same time and improves the wax oil hydrogenation efficiency.

The invention discloses a hydrocracking method for producing high-quality gasoline and diesel. The method comprises the steps: subjecting animal and vegetable oils to hydropretreating, then, enabling the pretreated oil to enter a hydrocracking reactor, and carrying out a contact reaction with a hydrocracking catalyst I under the conditions of relatively low temperature and high volumetric space velocity; then, mixing the product with a hydrorefining product of inferior diesel, and then, carrying out a contact reaction with a hydrocracking catalyst II; and subjecting the reaction product to separation and fractionation, thereby obtaining the high-quality gasoline and diesel. According to the method, separate characteristics of animal-and-vegetable-oil hydrogenation modification and inferior diesel hydro-conversion processes are fully taken into account, and the two kinds of processes are effectively combined reasonably, so that high-octane gasoline products and diesel products can be produced simultaneously, and the lubricating property of the diesel products is improved.