The present disclosure relates to systems and methods useful for power production. In particular, a power production cycle utilizing CO.sub.2 as a working fluid may be configured for simultaneous hydrogen production. Beneficially, substantially all carbon arising from combustion in power production and hydrogen production is captured in the form of carbon dioxide. Further, produced hydrogen (optionally mixed with nitrogen received from an air separation unit) can be input as fuel in a gas turbine combined cycle unit for additional power production therein without any atmospheric CO.sub.2 discharge.

A plant for producing ethylene having a reactor to effect oxidative coupling of methane, a work-up unit connected to the reactor to separate a first material stream produced by the reactor into a C.sub.1 material stream and an ethylene product stream and a separation unit connected to the work-up unit to separate the C.sub.1 material stream into a hydrogen-rich product stream and a hydrogen-lean residual gas stream. The plant also includes a steam cracker to produce (5) for producing an olefin-containing and hydrogen-containing crude gas stream. The steam cracker is connected to the work-up unit that separates the crude gas stream along with the first material stream into the C.sub.1 material stream and the ethylene product stream. A portion of the residual gas stream is recycled to the reactor. A process for producing ethylene using the plant is also described.

The present invention relates to net-zero hydrogen plants and methods of operating said plants having a lower cost and much larger scale compared to electrolysis driven plants utilized to produce green hydrogen.

The present invention relates to an installation for the production of dihydrogen comprising: a reaction enclosure (1) intended to contain an oxidizable material, an alkaline solution feed system (2) fluidly connected to the reaction enclosure (1), a pure water (31) supply system (3) fluidly connected to the reaction enclosure (1), a dihydrogen collection system (4) downstream of the reaction enclosure (1), the collection system (4) being fluidly connected: to the reaction enclosure (1), to the supply system (3), and to a storage receptacle (5) configured to store the produced dihydrogen at a desired high pressure.

Processes are disclosed for the conversion of biomass to oxygenated organic compound using a simplified syngas cleanup operation that is cost effective and protects the fermentation operation. The processes of this invention treat the crude syngas from the gasifier by non-catalytic partial oxidation. The partial oxidation reduces the hydrocarbon content of the syngas such as methane, ethylene and acetylene to provide advantageous gas feeds for anaerobic fermentations to produce oxygenated organic compounds such as ethanol, propanol and butanol. Additionally, the partial oxidation facilitates any additional cleanup of the syngas as may be required for the anaerobic fermentation. Producer gases and partial oxidation processes are also disclosed.

A process is described for the production of formaldehyde, comprising (a) subjecting methanol to oxidation with air in a formaldehyde production unit thereby producing a formaldehyde-containing stream; (b) separating said formaldehyde-containing stream into a formaldehyde product stream and a formaldehyde vent gas stream; wherein the vent gas stream, optionally after treatment in a vent gas treatment unit, is passed to one or more stages of: (i) synthesis gas generation, (ii) carbon dioxide removal, (iii) methanol synthesis or (iv) urea synthesis.

The disclosed embodiments relate to a process ideal for small scale (distributed) gas to liquids production by recycling and processing some side (non-targeted) products. During operation, the system produces a range of hydrocarbon outputs. The disclosed embodiments recycle non-targeted outputs to maximize the output of targeted hydrocarbon products. Recycled outputs include waxes, light gases and syngas. These embodiments allow for, but are not limited to, the efficient production of high cetane diesel fuel through the recycling of long-chain hydrocarbon wax and short-chain light. Process efficiency is further increased through the recycling of tail-gas produced from catalytic reactions.

A system for controlling a flow of a gas stream into a plurality of combustion chambers of an engine is provided. The system comprises a fuel reformer module configured to provide the flow of the gas stream containing hydrogen gas and carbon monoxide gas, a cooler module positioned downstream of the fuel reformer module with respect to the flow of the gas stream. The cooler module is configured to control a temperature of the gas stream. A flow control assembly is positioned downstream of the cooler module and upstream of the plurality of combustion chambers with respect to the flow of the gas stream. The flow control assembly is configured to supply a first effluent stream to a pre-chamber of the plurality of combustion chambers. The flow control assembly also supplies a second effluent stream to a main chamber of the plurality of combustion chambers.

Disclosed is an alternative fuel fueling station useful for fueling both electrical and hydrogen alternative fuel vehicles simultaneously. The alternative fuel fueling station includes a solid oxide fuel cell, an electrical conduit, and a compressed hydrogen conduit, such that the alternative fuel fueling station can fuel both the electrical and hydrogen alternative fuel vehicles simultaneously.

Process for the production of synthesis gas from hydrocarbon feed containing higher hydrocarbons comprising bypassing a portion of the hydrocarbon feed around a first pre-reforming stage and passing the pre-reformed and bypassed portions through at least a second pre-reforming stage.