38results about How to "Reduce the risk of carbon accumulation" patented technology

The invention discloses an online baking method for a heat insulation type natural gas catalytic oxidation furnace. The method comprises the steps of 1, injecting oxygen, natural gas and temperature control gas capable of reducing reaction temperature rising rate into the natural gas catalytic oxidation furnace at the same time, wherein the mole ratio of oxygen to natural gas is controlled to be 0.3-0.6 to 1, and the mole ratio of the temperature control gas to feed gas composed of oxygen and natural gas is controlled to be 0.1-7 to 1.3-1.6; 2, preheating the mixed gas to increase temperature gradually to oxidizing reaction triggering temperature; 3, reducing the mole ratio of temperature control gas to feed gas gradually to enable reaction temperature to rise according to the temperature rising rate required by a designed furnace baking curve, and stopping injection of temperature control gas when reaction temperature reaches working temperature. The method solves the problem that temperature rises too quickly during furnace baking, the situation that a heat insulation and refractory material cracks under shock heating is avoided, the natural gas catalytic oxidation furnace is protected, and the natural gas catalytic oxidation furnace can change to the normal operating state stably.

The present invention aims at the problem of poor adaptability of solid oxide fuel cells to carbon-containing fuels. In particular, the present invention discloses a chemical chain partial oxidation reforming transformation direct coupling fuel cell power generation system. This system follows the chemical chain reforming transformation direct internal In the scheme of coupling high-temperature solid oxide fuel cells, the cathode and anode of high-temperature solid oxide fuel cells are directly placed in the exhaust space of the oxidation and reduction reactor tails of the chemical chain reforming transformation to form a closely connected cathode chamber and anode chamber. The hydrogen-rich gas produced by methane chemical chain reformation and the oxygen in the reaction air are directly supplied to the anode and cathode of the high-temperature solid oxide fuel cell. This system makes the heat and mass transfer and utilization of the two processes efficiently connected, rationally utilizes the low-grade heat energy in the process, reduces the exergy loss in the process of chemical energy-thermal energy exchange, and realizes the cascade utilization of energy; at the same time, it breaks the thermodynamic limitation of the reaction process. Ultimately realize the efficient power generation of methane and the enrichment of carbon dioxide.

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst, a preparation method thereof and a method for preparing isobutene from isobutane dehydrogenation. The method for preparing the isobutane dehydrogenation catalyst comprises: (a) carrying out thermal activation treatment on the zeolite to obtain a thermally activated zeolite carrier; (b) applying the thermally activated zeolite carrier obtained in step (a) to the The precursor and the Zn component precursor solution are impregnated, followed by solvent removal, drying and roasting. The method is simple to operate, and the raw materials are readily available, and the obtained isobutane dehydrogenation catalyst can achieve better dehydrogenation activity, selectivity, stability and carbon deposition resistance under the condition that the loaded amount of noble metal is very low.

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst, a preparation method thereof and a method for preparing isobutene from isobutane dehydrogenation. The method for preparing the isobutane dehydrogenation catalyst comprises: (a) template agent, potassium sulfate, acid agent and tetraethyl orthosilicate are mixed and contacted, and the obtained mixture is crystallized and filtered to obtain a cubic center of Im3m The original powder of the hexagonal mesoporous material with the structure; (b) carrying out the release template treatment with the original powder of the hexagonal mesoporous material with the cubic center Im3m structure, to obtain the hexagonal mesoporous material carrier; (c) the hexagonal mesoporous material carrier; (c) the hexagonal mesoporous material carrier The porous material carrier is subjected to thermal activation treatment, then impregnated in a solution containing a Pt component precursor and a Zn component precursor, followed by solvent removal treatment, drying and calcination in sequence. The obtained isobutane dehydrogenation catalyst has good dehydrogenation activity and carbon deposition resistance.

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst, a preparation method thereof and a method for preparing isobutene from isobutane dehydrogenation. The method for preparing the isobutane dehydrogenation catalyst comprises: (a) mixing a template agent, N, N-dimethylformamide and hydrochloric acid until the solids are fully dissolved; (b) mixing the solution obtained in step (a) with silicon (c) the product obtained in step (b) is contacted with silica gel for the second time, and the mixture obtained after the second contact is successively crystallized, filtered, washed and dried to obtain silica gel mesoporous dioxide Silicon composite raw powder; (d) remove the template agent in the product obtained in step (c) to obtain a silica gel mesoporous silica composite material carrier; (e) prepare the silica gel mesoporous silica composite material obtained in step (d) The carrier contains Pt component precursor and Zn component. The isobutane dehydrogenation catalyst prepared by the method has better dehydrogenation activity and carbon deposition resistance.

The object of the present invention is to provide a dual fuel nozzle with dual oil paths and single nozzles, which includes a nozzle housing, a main oil path swirl atomization assembly, an auxiliary oil path swirl atomization assembly, and a gaseous fuel nozzle; the main oil path swirl atomization assembly The atomization assembly includes the main oil circuit swirler, the main fuel flow channel, the main oil circuit pre-swirl chamber, the swirl chamber, and the fuel nozzle; the auxiliary oil circuit swirl atomization assembly includes the auxiliary oil circuit swirler, the auxiliary fuel flow channel , swirl chamber, and fuel nozzle; the invention can realize the undisturbed online switching of gaseous fuel and liquid fuel without stopping the machine; the design of double oil circuit ensures the good fuel atomization effect before the idle condition, and the idle condition In the future, the fuel injection flow rate can be greatly increased without greatly increasing the fuel supply pressure; the design of the anti-carbon deposition air cooling component and the common nozzle of the main and auxiliary oil circuits can effectively prevent carbon deposition at the nozzle; the structural design of the auxiliary fuel flow channel surrounding the main fuel flow channel is effective The problem of thermal coking of the residual oil in the main fuel flow channel is avoided.

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst, a preparation method thereof and a method for preparing isobutene from isobutane dehydrogenation. The method for preparing the isobutane dehydrogenation catalyst comprises: (a) contacting water glass, inorganic acid solution, n-butanol and glycerol, and then sequentially filtering and washing, ball milling, slurrying and spraying the obtained contact product Drying to obtain a silica gel carrier; (b) impregnating the silica gel carrier obtained in step (a) in a solution containing a Pt component precursor and a Zn component precursor, and then performing solvent removal and drying successively, wherein the step ( The filtering and washing described in a) is carried out in a ceramic membrane filter, and the content of sodium ions in the filtered and washed material in terms of sodium element is not higher than 0.2% by weight. The method has the advantages of simple operation, energy saving and environmental friendliness, and the obtained isobutane dehydrogenation catalyst can achieve better catalytic activity and stability under the condition that the loaded amount of noble metal is very low.

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst, a preparation method thereof and a method for preparing isobutene from isobutane dehydrogenation. The method for preparing an isobutane dehydrogenation catalyst includes: (a) preparing a mesoporous molecular sieve material; (b) mixing the aforementioned mesoporous molecular sieve material with silica gel, and then filtering and washing the mixed material, ball milling, slurrying and spraying in sequence Drying to obtain a spherical double mesoporous composite material carrier; (c) impregnating the aforementioned spherical double mesoporous composite material carrier in a solution containing a Pt component precursor and a Zn component precursor, followed by solvent removal and Drying, wherein, the filtering and washing described in step (b) is carried out in a ceramic membrane filter, the content of sodium ions in the mixed material after filtering and washing is not higher than 0.2% by weight in terms of sodium element, and the content of template agent is not higher than 1% by weight. The obtained isobutane dehydrogenation catalyst has good dehydrogenation activity and carbon deposition resistance.