摘要:
THE SPECIFIC EMBODIMENTS PROVIDE FOR CONTROLLING A CATALYST SECTION OF A FLUID CATALYST CRACKING SYSTEM BY ADJUSTING THE FLOW RATE OF AN OXYGEN-CONTAINING GAS TO A REGENERATOR IN RESPONSE TO DEVIATION OF THE REGENERATOR DENSE BED TEMPERATURE FROM A PREDETERMINED DENSE BED TEMPERATURE, AND BY ADJUSTING THE PREDETERMINED REGENERATOR DENSE BED TEMPERATURE IN RESPONSE TO A DEVIATION OF THE REACTOR TEMPERATURE FROM A PREDETERMINED REACTOR TEMPERATURE. FURTHER, THE REGENERATED CATALYST FLOW RATE IS ADJUSTED IN RESPONSE TO DEVIATION OF THE FLUE GAS TEMPERATURE FROM A PREDETERMINED FLUE GAS TEMPERATURE.
摘要:
AN IMPROVEMENT IN A PROCESS FOR UTILIZATION OF THE ENERGY CONTENT OF THE FLUE GAS ACCRUED N CATALYTIC CRACKING PLANTS AND FOR THE ECONOMIC CONTROL OF SUCH CRACKING PLANTS, TO THEREBY IMPROVE THE ENTIRE EFFECTIVENESS OF SUCH A PLANT AND ITS ADAPTABILITY TO VARIOUS OPERATING CONDITIONS. THE PROCESS COMPRISES THE STEPS OF SUPPLYING THE COMBUSTION AIR REQUIRED FOR THE REGENERATION OF THE CATALYST TO THE REGENERATOR BY A COMPRESSOR, SUPPLYING THE ACCRUED FLUE GAS TO AN EXHAUST GAS TURBINE BY A CYCLONE BEING INDEPENDENT OF SAID REGENERATOR, SAID EXHAUST GAS TURBINE IS ARRANGED PARTICULARLY TO DRIVE A GENERATOR, BURING THE COMBUSTIBLE PART OF CO CONTAINED IN THE FLUE GAS IN A CATALYTIC CO BOILER FOLLOWING THE TURBINE, SUPPLYING THE SURPLUS AIR RESULTING FROM A SLIGHTER REQUIREMENT OF COMBUSTION AIR FOR HEATING TO SAID CO BOILER BY MEANS OF A LINE (BYPASS LINE) LEADING PAST THE CRACKING PROCESS AND BRANCHING OFF BETWEEN SAID COMPRESSOR AND SAID REGENERATOR AND MIXING SAID SURPLUS AIR TO THE FLUE GAS COMING FROM THE REGENERATOR BEFORE SAID CYCLONE.
摘要:
Disclosed is a method for providing improved hydrogenation activity by pretreating a catalyst in a three-step manner before selective hydrogenation of unsaturated hydrocarbons in an aromatic fraction in the presence of an oxide-type bimetallic (particularly nickel-molybdenum) supported catalyst.
摘要:
A system and method for oxidizing methane can include an environmentally friendly catalyst material that converts methane to an oxidized product at low temperatures and concentrations, for example, under 350° C. at concentrations less than 40% methane, including less than 5% methane.
摘要:
Disclosed is a method for providing improved hydrogenation activity by pretreating a catalyst in a three-step manner before selective hydrogenation of unsaturated hydrocarbons in an aromatic fraction in the presence of an oxide-type bimetallic (particularly nickel-molybdenum) supported catalyst.
摘要:
SCR-active molecular-sieve based catalysts with improved low-temperature performance are made by heating a molecular-sieve in a non-oxidizing atmosphere with steam (hydrothermal treatment), or in a reducing atmosphere without steam (thermal treatment), at a temperature in the range of 600-900° C. for a time period from 5 minutes to two hours. The resulting SCR-active iron-containing molecular sieves exhibit a selective catalytic reduction of nitrogen oxides with NH3 or urea at 250° C. that is at least 50% greater than if the iron-containing molecular-sieve were calcined at 500° C. for two hours without performing the hydrothermal or thermal treatment.
摘要:
Methods for synthesizing a water-soluble titanium-silicon complex are disclosed herein. The titanium-silicon complex can be utilized to produce titanated solid oxide supports and titanated chromium supported catalysts. The titanated chromium supported catalysts subsequently can be used to polymerize olefins to produce, for example, ethylene based homopolymer and copolymers.
摘要:
The present invention relates to a method for fluorinating a chlorinated compound including the steps of (a) placing said chlorinated compound in contact with gaseous hydrogen fluoride within a reactor and in the presence of a fluorination catalyst to produce a fluorinated compound, and (b) regenerating the fluorination catalyst used in step a), the step of regenerating the fluorination catalyst including (c) treating said fluorination catalyst with an oxidizing agent to form an oxidized fluorination catalyst, and (d) treating the oxidized fluorination catalyst obtained in step (c) with a gas mixture including a reducing agent.