The present disclosure relates to systems and methods that are useful for controlling one or more aspects of a power production plant. More particularly, the disclosure relates to power production plants and methods of carrying out a power production method utilizing different fuel chemistries. Combustion of the different fuel mixtures can be controlled so that a defined set of combustion characteristics remains substantially constant across a range of different fuel chemistries.

An eFuels plant and process for producing synthetic hydrocarbons using renewable energy are disclosed. The eFuels plant comprises a hydrocarbon synthesis (HS) system and a renewable feed and carbon/energy recovery (RFCER) system. The RFCER comprises an oxygen-fired heater to provide operational flexibility and efficiency. The oxygen fired heater comprises: a) one or more burners, suitable for accepting feeds comprising a hydrocarbon stream, an oxygen stream, and a diluent gas stream and producing combustion products comprising heat, carbon dioxide, and water; b) a radiant section, comprising a firebox and a radiant coil within the firebox, wherein the firebox is suitable for accepting the combustion products, and the radiant coil absorbs a first portion of the heat to produce first cooled combustion products; c) a convection section, comprising a convection coil and a convection inter-tube space defined by the outer surface of the convection coil, wherein the convection inter-tube space is suitable for accepting the first cooled combustion products to produce second cooled combustion products; and d) a carbon dioxide recovery section, comprising a condensing coil and a condensing inter-tube space defined by the outer surface of the condensing coil, wherein the condensing inter-tube space is suitable for accepting the second cooled combustion products to produce third cooled products comprising a non-condensables stream, comprising carbon dioxide, and a water stream.

An eFuels plant and process for producing synthetic hydrocarbons using renewable energy are disclosed. The eFuels plant comprises a hydrocarbon synthesis (HS) system and a renewable feed and carbon/energy recovery (RFCER) system. The RFCER comprises an oxygen-fired heater to provide operational flexibility and efficiency. The oxygen fired heater comprises: a) one or more burners, suitable for accepting feeds comprising a hydrocarbon stream, an oxygen stream, and a diluent gas stream and producing combustion products comprising heat, carbon dioxide, and water; b) a radiant section, comprising a firebox and a radiant coil within the firebox, wherein the firebox is suitable for accepting the combustion products, and the radiant coil absorbs a first portion of the heat to produce first cooled combustion products; c) a convection section, comprising a convection coil and a convection inter-tube space defined by the outer surface of the convection coil, wherein the convection inter-tube space is suitable for accepting the first cooled combustion products to produce second cooled combustion products; and d) a carbon dioxide recovery section, comprising a condensing coil and a condensing inter-tube space defined by the outer surface of the condensing coil, wherein the condensing inter-tube space is suitable for accepting the second cooled combustion products to produce third cooled products comprising a non-condensables stream, comprising carbon dioxide, and a water stream.

A gas-fueled heater can have a housing with pressure regulators, a control valve, a fluid selection valve and a burner positioned therein. The pressure regulators, control valve, fluid selection valve and burner can be configured to combust a fuel to create heat. The housing can include a number of holes passing therethrough to control access to the various components.

A gas-fueled heater can have a housing with pressure regulators, a control valve, a fluid selection valve and a burner positioned therein. The pressure regulators, control valve, fluid selection valve and burner can be configured to combust a fuel to create heat. The housing can include a number of holes passing therethrough to control access to the various components.

The present disclosure generally relates to the introduction of a liquid biomass in heating systems such as commercial boilers in order to reduce dependence on petroleum-based heating fuel oils as a source of combustion fuel. More specifically, the present disclosure is directed to systems, methods, and apparatuses utilizing a liquid thermally produced from biomass into commercial and industrial boiler or thermal systems such as boilers, furnaces, and kilns, and methods for generating renewable identification numbers (RINs), alternative energy credits (AECs) and renewable energy credits (RECs).

The present disclosure generally relates to the introduction of a liquid biomass in heating systems such as commercial boilers in order to reduce dependence on petroleum-based heating fuel oils as a source of combustion fuel. More specifically, the present disclosure is directed to systems, methods, and apparatuses utilizing a liquid thermally produced from biomass into commercial and industrial boiler or thermal systems such as boilers, furnaces, and kilns, and methods for generating renewable identification numbers (RINs), alternative energy credits (AECs) and renewable energy credits (RECs).

A heater having first and second oxygen depletion sensors and a main burner injector and configurable for the delivery of at least first and second types of fuels.

A heater having first and second oxygen depletion sensors and a main burner injector and configurable for the delivery of at least first and second types of fuels.

A method for controlling an NOx concentration in an exhaust gas in a combustion facility by: measuring a reaction velocity k.sub.i of each of a plurality of chars, each corresponding to a plurality of types of pulverized coals; determining a relationship between the NOx concentration in the exhaust gas and the reaction velocity k.sub.i for each of the chars; (iii) blending the plurality of the types of the pulverized coal, wherein a blending ratio of the plurality of the types of the pulverized coal is determined by using, as an index, a reaction velocity k.sub.blend of the char of the blended pulverized coal, which corresponds to a target NOx concentration or below, on the basis of the relationship; and supplying the blended pulverized coal to the combustion facility as the fuel of the combustion facility.