A process for producing ethylene comprising introducing fuel, ethane/higher hydrocarbons, oxygen, steam to annular jet vortex chamber having combustion upstream of cracking to provide swirling fluid flow pattern producing cracking product (ethylene, acetylene, ethane, methane, 10-60 wt. % water, CO.sub.2, CO, hydrogen, oxygenates) having first temperature; cooling cracking product with residence <2,000 milliseconds yielding first cooled product having second temperature lowered by ?30? C.; cooling first cooled product yielding second cooled product having third temperature lowered by ?300? C. and heated heat exchange medium; separating second cooled product into removed water (water, oxygenates), and cracked gas (ethylene, acetylene, ethane, methane, CO.sub.2, CO, hydrogen) introduced to continuous regeneration CO.sub.2 removal unit producing CO.sub.2-lean gas having at least 10? less CO.sub.2; introducing CO.sub.2-lean gas to once-through CO.sub.2 removal unit producing CO.sub.2-depleted gas (ethylene, acetylene, ethane, methane, CO, hydrogen); separating CO.sub.2-depleted gas into ethylene, ethane, tail gas (methane, CO, hydrogen).

A cracking furnace system for converting a hydrocarbon feedstock into cracked gas includes a convection section, a radiant section and a cooling section. The convection section includes a plurality of convection banks configured to receive only a hydrocarbon feedstock and a diluent. The radiant section includes a firebox comprising at least oxygen or oxygen enriched air burners and several radiant coils configured to heat up the feedstock to a temperature allowing a pyrolysis reaction. The cooling section includes at least two transfer line exchangers (TLE), a primary transfer line exchanger (PTLE) and a secondary transfer line exchanger (STLE). The system includes a mixing device for mixing the preheated hydrocarbon feedstock and the preheated diluent. The system is configured such that the hydrocarbon feedstock and diluent mixture is preheated in the secondary transfer line exchanger before entry into the radiant section. The primary transfer line exchanger is configured to generate saturated steam. The system includes a steam drum which is connected to the primary transfer line exchanger.

Systems and methods are provided for expanding the operating envelope for an FCC reaction system while also reducing or minimizing the net environmental CO.sub.2 emissions associated with the FCC reaction system and/or the resulting FCC products. In some aspects, reducing or minimizing net environmental CO.sub.2 emissions can be achieved during processing of unconventional feeds, such as feeds that are traditionally viewed as having insufficient tendency to coke in order to maintain heat balance within an FCC reaction system. In other aspects, this can correspond to expanding the production of diesel within an FCC reaction system by modifying the reaction conditions in a manner that can cause a reaction system to fall out of heat balance (relative to the heat needed to maintain a target operating temperature) even when using conventional feeds

Systems and methods are provided for expanding the operating envelope for an FCC reaction system while also reducing or minimizing the net environmental CO.sub.2 emissions associated with the FCC reaction system and/or the resulting FCC products. In some aspects, reducing or minimizing net environmental CO.sub.2 emissions can be achieved during processing of unconventional feeds, such as feeds that are traditionally viewed as having insufficient tendency to coke in order to maintain heat balance within an FCC reaction system. In other aspects, this can correspond to expanding the production of diesel within an FCC reaction system by modifying the reaction conditions in a manner that can cause a reaction system to fall out of heat balance (relative to the heat needed to maintain a target operating temperature) even when using conventional feeds

Systems and methods are provided for incorporating molten carbonate fuel cells into a heat recovery steam generation system (HRSG) for production of electrical power while also reducing or minimizing the amount of CO.sub.2 present in the flue gas exiting the HRSG. An optionally multi-layer screen or wall of molten carbonate fuel cells can be inserted into the HRSG so that the screen of molten carbonate fuel cells substantially fills the cross-sectional area. By using the walls of the HRSG and the screen of molten carbonate fuel cells to form a cathode input manifold, the overall amount of duct or flow passages associated with the MCFCs can be reduced.

A process for making high density fuels having the potential to increase the range and/or loiter time of Navy platforms. Derivation of these fuels from a sustainable source will decrease the carbon footprint of the Department of Defense (DoD) and reduce reliance on nonsustainable petroleum sources. Fuels based on longifolene have volumetric net heats of combustion up to 17% higher than conventional Navy jet fuel (JP-5). Moreover, longifolene can be generated from sustainable biomass sugars via fermentation.

A process for making high density fuels having the potential to increase the range and/or loiter time of Navy platforms. Derivation of these fuels from a sustainable source will decrease the carbon footprint of the Department of Defense (DoD) and reduce reliance on nonsustainable petroleum sources. Fuels based on barbatene and thujopsene have volumetric energy densities comparable to JP-10 and can be produced from biomass sugars.

A process for making high density fuels having the potential to increase the range and/or loiter time of Navy platforms. Derivation of these fuels from a sustainable source will decrease the carbon footprint of the Department of Defense (DoD) and reduce reliance on nonsustainable petroleum sources. Fuels based on santalenes have volumetric energy densities greater than JP-5 and F-76 and can be produced from biomass sugars.

A bio-renewable conversion process for making fuel from bio-renewable feedstocks is combined with a hydrogen production process that includes recovery of CO.sub.2. The integrated process uses a purge gas stream comprising hydrogen from the bio-renewable hydrocarbon production process in the hydrogen production process.

The embodiments of the present disclosure provide a full recovery process for carbon dioxide emitted from a catalytic cracking regeneration device, which is executed by a processor of a full recovery system for carbon dioxide. The full recovery process includes recovering, through a flue gas recovery device, a circulated flue gas generated by the catalytic cracking regeneration device, and mixing the circulated flue gas and oxygen to produce a carbon-based gas; determining a concentration sequence and a gas flow rate sequence in a connection pipe, and a reaction parameter of the catalytic cracking regeneration device; determining a combustion feature based on the concentration sequence and the gas flow rate sequence; and in response to the combustion feature satisfying a first preset condition, determining a target opening combination of a target flow rate regulating valve based on at least the combustion feature and the reaction parameter.