One variation of a diamond composition includes carbon: including a first amount of carbon-13 isotopes and a second amount of carbon-12 isotopes; and sourced from a hydrocarbon mixture including hydrocarbons and formed via methanation of a carbon dioxide mixture. The carbon dioxide mixture: sourced from a sample of air including carbon dioxide and impurities; conveyed through a separation unit configured to remove impurities; including carbon dioxide and impurities; conveyed through a distillation column configured to regulate amounts of carbon-13 isotopes and carbon-12 isotopes; and exhibiting a target ratio of carbon-13 isotopes to carbon-12 isotopes at an outlet of the distillation column. The diamond composition: formed via chemical vapor deposition; and exhibiting an isotopic signature defining a final ratio of the first amount of carbon-13 isotopes to the second amount of carbon-12 isotopes within a first target range corresponding to the target ratio exhibited by the carbon dioxide mixture.

The present disclosure provides systems and methods useful in capture of one more moieties (e.g., carbon dioxide) from a gas stream (i.e., direct air capture). In various embodiments, the systems and methods can utilize at least a scrubbing unit, a regeneration unit, and an electrolysis unit whereby an alkali solution can be used to strip the moiety (e.g., carbon dioxide) from the gas stream, the removed moiety can be regenerated and optionally purified for capture or other use, and a formed salt can be subjected to electrolysis to recycle the alkali solution back to the scrubber for re-use with simultaneous production of one or more further chemicals.

Device and process for converting a feedstock of aromatic compounds, in which the feedstock is notably treated using a fractionation train (4-7), a xylenes separating unit (10) and an isomerization unit (11), and in which a pyrolysis unit (13) treats a second hydrocarbon-based feedstock, produces a pyrolysis effluent feeding the feedstock, and produces a pyrolysis gas comprising CO, CO2 and H2; a WGS water gas shift reaction section (50) suitable for treating the pyrolysis gas and for producing a WGS gas enriched in CO2 and in hydrogen; a CO2 aromatization reaction section (52) suitable for: at least partly treating the WGS gas to produce a hydrocarbon effluent comprising aromatic compounds, and feeding the feedstock with the hydrocarbon effluent.

The present invention relates to a system for producing synthetic fuels, in particular jet fuel (kerosene), gasoline and/or diesel, comprising: a) an apparatus for separately extracting carbon dioxide and water from ambient air, b) a synthesis gas production apparatus for producing a raw synthesis gas comprising carbon monoxide, hydrogen, carbon dioxide and water, the synthesis gas production apparatus having a supply line for carbon dioxide leading from the apparatus for separately extracting carbon dioxide and water from ambient air, a supply line for air and a supply line for water, c) a separating apparatus for separating carbon dioxide and water from the raw synthesis gas produced in the synthesis gas production apparatus, d) a Fischer-Tropsch apparatus for producing hydrocarbons by means of a Fischer-Tropsch process from the synthesis gas from which carbon dioxide and water were separated in the separating apparatus, e) a refining apparatus for refining the hydrocarbons produced in the Fischer-Tropsch apparatus into synthetic fuels, f) a desalination apparatus for desalinating water, the desalination apparatus having a water supply line from the apparatus for separately extracting carbon dioxide and water from ambient air and a water discharge line to the Fischer-Tropsch apparatus, and g) a water purification apparatus, which comprises a water supply line leading from the Fischer-Tropsch apparatus for purifying water produced therein, the system further comprising a pre-reformer for converting hydrocarbons other than methane into methane, carbon oxides, water and hydrogen and i) a water vapor supply line leading from the water purification apparatus to the pre-reformer, ii) a process gas supply line leading from the refining apparatus to the pre-reformer and/or a return gas line leading from the Fischer-Tropsch apparatus to the pre-reformer and iii) a circulation line leading from the pre-reformer to the supply line for water connected to the synthesis gas production apparatus.

A plasmonic nanoparticle catalyst for producing hydrocarbon molecules by light irradiation, which comprises at least one plasmonic provider and at least one catalytic property provider, wherein the plasmonic provider and the catalytic property provider are in contact with each other or have distance less than 200 nm, and molecular composition of the hydrocarbon molecules produced by light irradiation is temperature-dependent. And a method for producing hydrocarbon molecules by light irradiation utilizing the plasmonic nanoparticle catalyst.

A method for preparing a carbonaceous product includes providing oxygen, in particular from electrolysis, and providing a fuel. The method also includes combusting the fuel with the oxygen by an oxy-fuel combustion process in order to provide energy, purifying a flue gas produced by the oxy-fuel combustion process, and separating carbon dioxide from the flue gas produced by the oxy-fuel combustion process, wherein energy provided by the oxy-fuel combustion process includes, in particular exclusively, heat which is used as process heat for purifying and/or for synthesising or providing the carbonaceous product. A corresponding system is designed to carry out the described method.

The invention relates to a method for the heterogeneous catalysis of a reaction for the hydrogenation of a carbon oxide in the gaseous state, such as a methanation reaction, using, in a reactor (1), carbon dioxide and gaseous dihydrogen and at least one solid catalytic compound capable of catalyzing said reaction in a given temperature range T, comprising contacting said gaseous reactant and said catalytic compound in the presence of a heating agent, and heating the heating agent to a temperature within said temperature range T. The method is characterized in that the heating agent comprises a ferromagnetic material in the form of micrometric powder and/or wires, said ferromagnetic material being heated by magnetic induction by means of a field inductor, such as a coil (2) external to the reactor (1). According to one embodiment, the catalyst support for implementing said method comprises a ferromagnetic material in the form of wires of micrometric diameters, on the surface of which metal catalyst particles are deposited.

Disclosed are a catalyst for preparing hydrocarbons from carbon dioxide by one-step hydrogenation and a method for preparing same. The catalyst includes nano-metal oxides and hierarchical zeolites, where the mass fraction of the nano-metal oxides in the catalyst is 10%-90%, and the mass fraction of the hierarchical zeolites in the catalyst is 10%-90%. The catalyst has excellent catalytic performance, good reaction stability and high selectivity for desired products, and in the hydrocarbons, C.sub.2.sup.=-C.sub.4.sup.= reach up to 80%, C.sub.5+ reach up to 80%, and aromatics reach up to 65%.

Methods and systems for treating a subterranean formation. An example method performs a wellbore operation with a first treatment fluid, removes a flammable gaseous hydrocarbon from a well penetrating the subterranean formation; wherein the well is disposed on a wellsite, introduces the flammable gaseous hydrocarbon into a gas-to-liquid reactor located on the wellsite to produce an oleaginous liquid, produces a second treatment fluid comprising the oleaginous liquid at the wellsite, and introduces the second treatment fluid into the well.

An abrupt interface electroreduction catalyst includes a porous gas diffusion layer and a catalyst layer providing a sharp reaction interface. The electroreduction catalyst can be used for converting CO.sub.2 into a target product such as ethylene. The porous gas diffusion layer can be hydrophobic and configured for contacting gas-phase CO.sub.2 while the catalyst layer is disposed on and covers a reaction interface side of the porous gas diffusion layer. The catalyst layer has another side contacting an electrolyte and can be hydrophilic, composed a metal such as Cu and is sufficiently thin to prevent diffusion limitations of the reactant in the electrolyte and enhance selectivity for the target product. The electroreduction catalyst can be made by vapor deposition methods and can be used for electrochemical production of ethylene in reaction system.