10 results about "Oxy-fuel" patented technology

The invention belongs to the field of fuel additive preparation, and relates to a preparation method of an alcohol-based oxygen-containing fuel additive. In order to solve the problems that an existing carbonic ester additive is relatively low in boiling point and is not matched with a diesel distillation range, the invention develops a special catalyst and a preparation process for preparing an alcohol-based oxygen-containing fuel additive, the catalyst takes a hierarchical pore molecular sieve as a carrier, and a potassium alcoholate active component and an amphiphilic molecule linking agent are introduced. Then catalyzing the ester exchange reaction of dimethyl carbonate and butanol by using the catalyst to generate a mixture of methyl butyl carbonate, dibutyl carbonate and the like, and fractionating to obtain the alcohol-based oxygen-containing fuel additive which has a proper boiling point and can be used for remarkably improving the oxygen content of the fuel.

The invention relates to a method for separating gases which comprises:a first step in which a gas fuel stream comprising combustible substances that produce gas products when oxidised, and an oxygen-rich inlet stream are passed through at least two modules of oxygen-separating ceramic membranes, such that the two streams come into contact through the membranes and exchange heat;a second step of selective diffusion of oxygen from the oxygen-rich stream to the fuel stream, such that the outlet streams from the membrane modules are an oxygen-depleted or completely oxygen-free stream and a partially or completely oxidised stream; anda third step of recovery of at least two separate outlet streams of at least two gases selected from oxygen, nitrogen, carbon dioxide and hydrogen.

The present application relates to a kind of strong turbulent ammonia combustion flame internal structure and temperature field measurement system, a small amount of oxygen-containing fuel is added in strong turbulent ammonia combustion field to generate CH2O mark preheating zone, a Nd:YAG pumping laser is used to emit 355nm and 532nm laser simultaneously, wherein 355nm laser is used to excite CH2O and Rayleigh scattering signal;303nm laser is obtained after 532nm laser pumps dye laser to be frequency doubled, for exciting NH;CH2O fluorescence signal, Rayleigh scattering signal and NH fluorescence signal are detected by using three ICCD cameras distribution.By the present application, it can be realized to use a set of Nd:YAG, dye laser and three ICCD cameras, the synchronous measurement of ammonia combustion flame preheating zone, reaction zone and temperature field.

The present application relates to the technical field of hydrocarbon fuel thermal oxidation stability test, and discloses a hydrocarbon fuel oxidation coking accelerated test method based on multi-parameter synergistic reinforcement, which comprises the following steps: oxygen is introduced into the hydrocarbon fuel through a microporous dispersion device to make the dissolved oxygen concentration in the fuel reach 30 ppm to 50 ppm; the oxygen-containing fuel is pumped into a reaction tube with an inner diameter of 4.5 mm to 5.0 mm and a length of 80 cm at a flow rate of 0.08 g / s to 0.12 g / s; the oxidation coking reaction is carried out under the conditions of an oil temperature of 450 DEG C to 500 DEG C at the outlet of the reaction tube and a pressure of 3.5 MPa; the carbon deposition mass on the inner wall of the reaction tube is quantified by adopting a pipeline carbon burning method; and the suspended carbon particle mass is collected and weighed through a rear-end filter. The present application realizes the method of accelerated test and quantitative evaluation under the oxidation coking flow state through the synergistic control of three parameters of dissolved oxygen concentration, flow rate and pipe diameter.

Syngas and liquid hydrocarbons are produced from synthesis gas. The synthesis gas is produced from a feed mixture of hydrogen and carbon dioxide. The feed mixture is heated to the reverse water gas shift (RWGS) reactor inlet temperature of 1400 to 1800°F or even more preferred to a RWGS reactor inlet temperature of 1550 to 1650°F. Some of the heat required to heat the feed mixture to the RWGS inlet temperature is supplied by the oxyfuel combustion of hydrogen or fuel with oxygen and minimizes the load onto electrical heaters or need for gas fired geaters. The high inlet temperature allows a high conversion of carbon dioxide to carbon monoxide. Various fuels can be used including hydrogen, hydrocarbons, oxygenates, or carbon monoxide can be used as combustion fuel. The carbon monoxide produced can further be reacted with hydrogen to produce hydrocarbon fuels and chemicals. The hydrocarbon fuels produced include sustainable aviation fuel (SAP) that meets ASTM D7566 specification and diesel fuel that meets ASTM D975 specification. The hydrogen and oxygen are produced from the electrolysis of water. The carbon dioxide can be captured from industrial point sources such as power plants, ethanol plants, steel mills, or other producers of carbon dioxide. Alternatively, the carbon dioxide can be captured from the atmosphere.

The application provides a self-initiating high-power high-energy liquid fuel and a preparation method thereof, which comprises the following components in percentage by weight: 10-50wt% of alkyl aluminum; 40-75wt% of main fuel; 10-35wt% of oxygen-containing fuel; the main fuel is one or more of chain hydrocarbon compounds and cyclic hydrocarbon compounds; and the oxygen-containing fuel is polymethoxy dialkyl ether. The high-energy liquid fuel provided by the application provides a detonation temperature by alkyl aluminum, the alkyl aluminum is dissolved in the main fuel, and no settlement, aggregation or deterioration occurs during long-term storage, and the high-energy liquid fuel has good storage stability; moreover, the alkyl aluminum has lower initiation energy and higher combustion energy, which can effectively ensure the detonation temperature of the high-energy liquid fuel. The polymethoxy dialkyl ether not only ensures the oxygen content of the fuel, but also can improve the combustion rate of the high-energy liquid fuel, better play the energy of the high-energy liquid fuel, and further improve the combustion performance of the high-energy liquid fuel.

The invention relates to the technical field of hydrocarbon fuel thermal oxidation stability testing, and discloses a hydrocarbon fuel oxidation coking acceleration testing method based on multi-parameter synergistic intensification, which comprises the following steps: introducing oxygen into hydrocarbon fuel through a micropore dispersion device to enable the concentration of dissolved oxygen in the fuel to reach 30 ppm to 50 ppm; oxygen-containing fuel is pumped into a reaction tube with the inner diameter of 4.5 mm to 5.0 mm and the length of 80 cm at the flow speed of 0.08 g / s to 0.12 g / s; carrying out oxidation coking reaction under the conditions that the oil temperature at the outlet of the reaction tube is 450-500 DEG C and the pressure is 3.5 MPa; quantifying the mass of carbon deposited on the inner wall of the reaction tube by adopting a pipeline charking method; and the mass of the suspended carbon particles is collected and weighed through a rear-end filter. According to the method, accelerated testing and quantitative evaluation under the oxidation coking flowing state are achieved through coordinated regulation and control of three parameters including the dissolved oxygen concentration, the flow speed and the pipe diameter.

The present invention provides a system and a process for the production of methane, C2-C100 linear alkanes, C2-C10 olefins, oxygenates, methanol and combinations thereof, comprising: an oxyfuel combustor comprising a combustion gas outlet, and a first fluid entrance; a heat recovery system; a carbon capturing unit comprising an adsorption column which comprises a combustion gas inlet in fluid communication with the combustion gas outlet of the oxyfuel combustor, and a feed gas inlet; a desorption column; one or more methanol synthesis reactors; wherein the adsorption column comprises a base portion and a top portion; the adsorption column extends a height from the base portion to the top portion; the base portion corresponds to one half of the height of the adsorption column; the feed gas inlet and the combustion gas inlet are located in the base portion; and the feed gas inlet is located above the combustion gas inlet in the base portion.

A metal alloy and that includes an enhancement coating material. The metal alloy includes rhenium and one or more additives. The enhancement coating is at least partially applied to the metal alloy by a physical vapor deposition (PVD) process, a chemical vapor deposition (CVD) process, an atomic layer deposition (ALD) process, a plasma-enhanced chemical vapor deposition (PE-CVD) process, ion implantation, direct energy deposition (DED), and / or thermal spray techniques like plasma arc spraying, flame spraying, high velocity oxy fuel spraying (HVOF). The enhancement coating is formed of a) 35-95 wt. % zirconium and wherein said enhancement coating includes ZrN, ZrNC, ZrOC or a combination of ZrN and ZrO2, b) 20-85 wt. % titanium and one or more of carbon, nitrogen, oxygen, rhenium, and silicon, c) 40-85 wt. % chromium and one or more of carbon, nitrogen, oxygen, rhenium, and silicon, or d) at least 60 wt. % carbon.

The invention provides an air-fuel ratio control method and device, electronic equipment and a vehicle, and relates to the technical field of engines. The air-fuel ratio control method is applied to the engine, the engine uses fuel only containing gasoline, fuel only containing oxygen-containing fuel or mixed fuel of the gasoline and the oxygen-containing fuel in any proportion, and the air-fuel ratio control method comprises the steps that a corresponding target air-fuel ratio interval is determined according to the proportion of the oxygen-containing fuel in the fuel; an interpolation algorithm is adopted, and the target air-fuel ratio is determined according to the proportion of the oxygen-containing fuel and the target air-fuel ratio interval; and the engine is driven based on the target air-fuel ratio, and the target air-fuel ratio is corrected according to the current exhaust state of the engine so as to determine the corrected target air-fuel ratio. According to the method, the problem that the self-adaptive compensation deviation of the air-fuel ratio is large when the mixed fuel comprising different proportions of oxygen-containing fuel is used is solved, so that the air-fuel ratio control is more accurate, the combustion efficiency can be improved, and emission can be reduced.