Abstract:
Processes for converting methane into olefins are presented. Certain exemplary processes can involve use of both oxidative dry reforming of methane to syngas and conversion of the syngas to olefins via Fischer-Tropsch synthesis.
Abstract:
The invention concerns a process for preparing a chlorine comprising catalyst by (a) providing a Fischer-Tropsch catalyst comprising titania and at least 5 weight percent cobalt; (b) impregnating the catalyst with a solution comprising chloride ions;and (c) heating the impregnated catalyst at a temperature in the range of between 100 and 500 °C for at least 5 minutes up to 2 days. The prepared catalyst preferably comprises 0.13 –3 weight percent of the element chlorine. The invention further relates to the prepared catalyst and its use.
Abstract:
The method disclosed herein relates to two stage catalytic processes for converting syngas to acetic acid, acrylic acid and/or propylene. More specifically, the method described and claimed herein relate to a method of producing acrylic acid and acetic acid comprising the steps of: a) providing a feedstream comprising syngas; b) contacting the feedstream with a first catalyst to produce a first product stream comprising C 2 -C 3 olefins and/or C 2 -C 3 paraffins; and c) contacting the first product stream with oxygen gas and a second catalyst, thereby producing a second product stream comprising acrylic acid and acetic acid, wherein there is no step for separating the components of the first product stream before the first product stream is contacted with the second catalyst
Abstract:
The present invention relates to a catalyst composition comprising cobalt manganese oxide which is modified with silicon in the form of a hydrophilic silica, the catalyst further comprises at least one of lanthanum, phosphorus, Fe, Zr, and Zn and optionally one or more basic elements selected from the group consisting of alkali metal, alkaline earth metal and transition metal. Furthermore, a method for preparing said catalyst composition and a process for producing aliphatic and aromatic hydrocarbons using said catalyst composition is provided.
Abstract:
A process for the regeneration of deactivated catalyst from a Fischer- Tropsch synthesis reactor, the catalyst being a supported cobalt catalyst. The process comprises the following steps: a withdrawal step, in which a portion of deactivated catalyst together with liquid hydrocarbon is withdrawn from the reactor; a concentration step, in which the concentration of the catalyst in the liquid hydrocarbon is increased; a calcination step, in which the deactivated catalyst composition is subjected to an oxidising gas to oxidise carbonaceous material contained in the deactivated catalyst in to gaseous oxides of the components of the carbonaceous material; and a reactivation step, in which the deactivated catalyst composition is reactivated to produced a regenerated catalyst.
Abstract:
Disclosed herein is a novel F-T catalyst system suitable for the selective production of light olefins from syngas produced from natural gas (syngas to olefins; STO), which contains an iron-based catalyst and a calcium oxide (CaOx) prepared by a sol-gel process and shows an increased yield of C 2 -C 4 light olefins and improved catalyst stability.
Abstract:
The present invention relates to a catalyst for use in a process for the preparation of hydrocarbons comprising cobalt and manganese and/or vanadium, supported on a carrier, wherein the cobalt: (manganese + vanadium) atomic ratio is at least 12:1. Preferably, the cobalt: (manganese + vanadium) atomic ratio is at most 1500:1. The invention further relates to a process for the preparation of hydrocarbons which comprises contacting a mixture of hydrogen and carbon monoxide at elevated temperature and pressure with a catalyst as described hereinbefore. Typically, at least part of the cobalt is present in the metallic state.
Abstract:
A process for converting synthesis gas composed of hydrogen and carbon monoxide to hydrocarbons and a catalyst for the same. The process includes the step of contacting at reaction conditions a synthesis gas feed to a catalyst which includes cobalt in catalytically active amounts up to about 60 wt % of the catalyst and rhenium in catalytically active amounts of about 0.5 to 50 wt % of the cobalt content of the catalyst supported on alumina. An alkali metal promoter and further a metal oxide promoter may be added.
Abstract:
Methods of preparing syngas are provided. An exemplary method can include hydrogenation of carbon dioxide (CO 2 ) via a reverse water gas shift (RWGS) reaction. Catalysts that include Cu and/or Mn can be used, and the RWGS reaction can be conducted at a temperature greater than 600 °C. The syngas produced from hydrogenation of CO 2 can be used to generate light olefins via a Fischer-Tropsch synthesis (FT) reaction.