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

The invention provides a superaustenitic stainless steel electrode. A coating of the superaustenitic stainless steel electrode at least comprises the following components, by mass, 35 to 45 percent of rutile, 2 to 5 percent of titanium dioxide, 6 to 12 percent of marble, 6 to 12 percent of dolomite, 1 to 3 percent of quartz, 3.5 to 6.5 percent of cryolite, 4 to 8 percent of dehydrated feldspar, 3 to 5 percent of dehydrated phlogopite, 6 to 8 percent of chromium metal, 6 to 8 percent of electrolytic manganese, 3 to 6 percent of ferrotitanium, 1 to 2 percent of chromium oxide green, 2 to 4 percent of nickel powder, 0.5 to 1.5 percent of ferromolybdenum and 0.5 to 1.5 percent of sodium alginate. The coating of the superaustenitic stainless steel electrode is formed by mixing all the components according to the proportions, potassium and sodium are added to be mixed with sodium silicate, and the coating coats a core wire H02Cr20Ni25Mo4Cu to form the electrode. Carbon content is extremely low, comprehensive corrosion of sulfuric acid and phosphoric acid can be resisted, the corrosion of acetic acid at any temperature and in any concentration under ordinary pressure can be resisted, and an ideal welding material is provided for steel for manufacturing various strong acid storing and transporting containers.

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.

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 provides a method and device for coal direction liquefaction. The method for the coal direct liquefaction includes the following steps of: S1, performing a first liquefaction reaction ona first raw material which includes coal slurry and hydrogen so as to obtain first liquefied products, and performing oil-gas separation on the first liquefied products to obtain a first liquid-phaseproduct; S2, performing a second liquefaction reaction on a second raw material which comprises the first liquid-phase product, hydrogen and a solvent so as to obtain second liquefied products, and performing oil-gas separation on the second liquefied products to obtain a second liquid-phase product; S3, performing distillation and catalytic hydrogenation treatment on a part of the second liquid-phase product so as to obtain a coal liquefaction product; and S4, performing the steps of S1-S3 repeatedly, wherein the first raw materials and / or the second raw materials also include the rest of the second liquid-phase product during the repeated operation. Through the method for the coal direct liquefaction, the liquefaction conversion rate and liquid product yield of coal can be improved, andthe resource utilization rate can be improved significantly.

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 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 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 invention discloses a weak corrosivity removing method for an aluminum and copper compound mandrel for preparing a uranium-bearing hohlraum and relates to a demolding method of the uranium-bearing hohlraum. The method disclosed by the invention aims to solve the problem that in the prior art, the uranium-bearing hohlraum of the aluminum and copper compound mandrel cannot be demolded. The weak corrosivity removing method comprises the following steps: I, performing loading to obtain a sample stand containing a uranium-bearing hohlraum sample; II, performing negative pressure demolding to remove an aluminum mold core to obtain the sample stand loading a sample without the aluminum mold core; III, performing cleaning; IV, performing weak corrosivity removal of a copper coating to obtain the sample stand loading a sample without the copper coating; and V, immersing in a complexing agent, cleaning, and demolding the uranium-bearing hohlraum of the aluminum and copper compound mandrel. The method disclosed by the invention has the advantage that the molding success rate reaches 100%. The method disclosed by the invention is primarily applied to demolding the uranium-bearing hohlraum.

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.

A technology for preventing degradation of a hydrogen permeable metal layer in a fuel cell 210 is provided. A fuel cell system 200 including a fuel cell 210 with an anode which has the hydrogen permeable metal layer comprises a fuel cell controller 230 for controlling the operation status of the fuel cell system 200, a temperature parameter acquisition section for acquiring a temperature parameter of the hydrogen permeable metal layer, and a hydrogen permeable metal layer degradation prevention section which reduces the hydrogen partial pressure in an anode channel 212 for supplying fuel gas to the anode. If a temperature of the hydrogen permeable metal layer represented by the temperature parameter deviates from a specified temperature range, the fuel cell controller 230 cause the hydrogen permeable metal layer degradation prevention section to operate for preventing degradation of the hydrogen permeable metal layer.

The invention discloses a high-strength high-tenacity sintered flux for afterheat-free welding. The sintered flux is mixed sinter composed of dry powder and pure sodium water glass with the modulus of 2.8-3.2, and the addition amount of the water glass is 18-20% of the weight of the dry powder. The dry powder is composed of, by weight percent, 18-23% of fluorite, 33-37% of magnesia, 14-17% of bauxite, 3-5% of quartz, 7-12% of marble, 9-13% of wollastonite, 0-1.5% of ferromolybdenum, 1-3% of rare earth fluoride, 1-2% of silicon iron, 1-3% of manganese ore, and 0-3% of borax. Compared with the prior art, the sintered flux can form welding slag with an appropriate melting point and good viscosity and surface tension. In the welding process, arc combustion is stable, welding line transition is smooth, spreading is good, and appearance of welding lines is attractive. The oxygen content in the welding lines is lowered. The sintered flux can be matched with the WS80S welding wire for welding 10CrNi5MoV steel, yield strength of metal of the welding lines can reach more than 735MPa, the metal of the welding lines is -50 DEG C, impact energy can reach more than 50J, and the metal of the welding lines of afterheat-free welding can be crack-free.

The invention discloses a low-fluorine flux cored welding rod which comprises a metal casing and a filler composition. The filler composition contains, by weight, metallic oxide slag forming agent 15-70 parts, fluorinated compound 2-30 parts and metal alloy agent 5-65 parts, wherein the parts by weight of the metallic oxide slag forming agent is large than that of the fluorinated compound, the fluorine contained by the fluorinated compound is at least 15% of the weight of the filler composition, and the metal casing contains at least 70% by weight of iron. The low-fluorine flux cored welding rod is good in weld joint forming effect, little in smoke dust, small in splashing, small in welding pores and low in splashing rate.