摘要:
The present invention relates to a method of direct synthesis of light hydrocarbons from natural gas and carbon dioxide capable of improving production yield of light hydrocarbons and carbon utilization efficiency through a series of process of preparing synthesis gas with a predetermined molar ratio of carbon monoxide and hydrogen by a combined steam reforming of natural gas and carbon dioxide reforming of methane, performing Fischer-Tropsch reaction of the prepared synthesis gas in the presence of a specific catalyst, and recycling the byproducts of methane and carbon dioxide as the source material of the combined reforming.
摘要:
Disclosed is a process for the conversion of acyclic C5 feedstock to a product comprising cyclic C5 compounds, including cyclopentadiene, and catalyst compositions for use in such process. The process comprises contacting the feedstock and, optionally, hydrogen under acyclic C5 conversion conditions in the presence of a catalyst composition to form said product. The catalyst composition comprises a microporous crystalline metallosilicate, a Group 10 metal or compound thereof, and a Group 11 metal or compound thereof.
摘要:
Disclosed is a process for the conversion of acyclic C5 feedstock to a product comprising cyclic C5 compounds, such as for example, cyclopentadiene, and catalyst compositions for use in such process. The process comprising the steps of contacting said feedstock and, optionally, hydrogen under acyclic C5 conversion conditions in the presence of a catalyst composition to form said product. The catalyst composition comprising a microporous crystalline ferrosilicate, a Group 10 metal, and, optionally, a Group 11 metal, in combination with an optional Group 1 alkali metal and/or an optional Group 2 alkaline earth metal.
摘要:
The present disclosure relates to an additive and a catalyst composition for a catalytic cracking process of vacuum gas oil for preparing cracked run naphtha having reduced liquid olefin content, and increased propylene and butylene yields in the LPG fraction. The process makes use of a catalyst composition which is a mixture of an FCC equilibrated catalyst and an additive comprising a zeolite, phosphorus and a combination of metal promoters. The process is successful in achieving high propylene and butylene yields in the LPG fraction along with a lower liquid olefin content and increased aromatic content with increase in RON unit in the resultant cracked run naphtha, as compared to that achieved using an FCC equilibrated catalyst alone.
摘要:
One object is to provide an aldehyde decomposition catalyst, and an exhaust gas treatment apparatus and an exhaust gas treatment method using the aldehyde decomposition catalyst that achieve low cost and sufficient aldehyde decomposition performance with a small amount of the catalyst. An aldehyde decomposition catalyst of the present invention is made of a zeolite in a cation form NH 4 having a structure selected from MFI and BEA and carrying at least one metal selected from the group consisting of Cu, Mn, Ce, Zn, Fe, and Zr.
摘要:
An emissions treatment system for an exhaust stream of an internal combustion engine including hydrocarbons, carbon monoxide, and nitrogen oxides is provided. The disclosed system can include an exhaust conduit in fluid communication with the internal combustion engine via an exhaust manifold; a first three-way conversion catalyst (TWC-1) located downstream of the internal combustion engine in the exhaust conduit; an SCR-HCT catalyst comprising a selective catalytic reduction catalyst and a hydrocarbon trap downstream of the TWC-1 in the exhaust conduit; and a third catalyst downstream of the SCR-HCT combination in the exhaust conduit, the third catalyst comprising a platinum group metal (PGM) e.g., in an amount effective to oxidize hydrocarbons. Methods of making and using such systems and components thereof are also provided.
摘要:
A method for the transalkylation of a heavy reformate is provided. The heavy reformate is contacted with a transalkylation catalyst and hydrogen gas in a transalkylation reactor to selectively convert the heavy reformate to a xylenes-rich product stream. Light alkanes produced during the reaction can be supplied to a steam cracker where they are converted to light olefins.
摘要:
A system for treating exhaust gas from a vehicular lean-burn internal combustion engine with a lean/rich cycle, which system comprising a NO x adsorber catalyst and a downstream NH 3 -selective catalytic reduction (SCR) catalyst, wherein the NH 3 -SCR catalyst comprises copper supported on a molecular sieve, wherein the molecular sieve (a) has a maximum ring size of eight tetrahedral atoms; (b) is selected from the group consisting of aluminosilicate molecular sieves, metal-substituted aluminosilicate molecular sieves, and aluminophosphate molecular sieves; and (c) has a CHA Framework Type Code.