Elf Exploration Production

Total Sa

Elf Aquitaine Production

Total France

Totalfinaelf France

Total Raffinage Marketing

Sabine Savin-Poncet

Jean Nougayrede

Cuong Pham-Huu

Jacques Bousquet

Andre Philippe

Marc J Ledoux

Marc-Jacques Ledoux

Claude Crouzet

Nicolas Keller

Andre Pepy

Andr&eacute; Philippe

Pierre Becourt

Pascaline Leroi

Behrang Madani

Cuong Pham Huu

Maxime Lacroix

Daniel Schweich

In a process for the conversion of carbon monoxide to Chydrocarbons in the presence of hydrogen and of a catalyst comprising a metal and a support comprising silicon carbide, the support comprises more than 50% by weight of silicon carbide in the beta form. A process for the conversion of carbon monoxide to Chydrocarbons in the presence of hydrogen and of a catalyst the effluent thus obtained are also disclosed.

Process for the conversion of a synthesis gas to hydrocarbons in the presence of beta-SiC and effluent from this process

The invention relates to a method for obtaining synthesis gas by partial catalytic oxidation, consisting in bringing a hydrocarbon in a gaseous state into contact with an oxidizing gas, and therefore possibly a small amount of water vapor, in the presence of a catalyst comprising at least one silicon carbide at a temperature of more than 800&#xb0; C. According to the invention, the silicon carbide has a specific surface which is determined by the BET method and which is less than or equal to 100 m/g, the contact time between the mixture of gaseous hydrocarbon, oxidizing gas and silicon carbide being more than 0.05 seconds and the pressure inside the reactor being greater than atmospheric pressure.

Method for obtaining synthesis gas by partial catalytic oxidation

A process is provided to recover residual H S, SO , COS and CS in the tail gas from a sulphur recovery process. The tail gas is oxidized and hydrolyzed at a temperature of from 180&deg; C. to 700&deg; C. to provide an oxidized and hydrolyzed gas stream containing substantially no COS or CS and having a concentration by volume of H S and SO such that the H S concentration minus twice the SO concentration is from 0.25% to 0.5%. Then the gas stream from the hydrolysis is passed over a Claus catalyst, for example based on alumina and/or titanium oxide, for the reaction of H S with SO to form sulphur and provide a gas stream with substantially no SO . The resulting gas stream from the Claus reaction together with a gas containing free oxygen is then passed over an oxidation catalyst, such as one of more oxides or salts of Ni, Co, Fe, Cu, Ag, Mn, Mo, Cr, W or V, deposited on a support, such as bauxite, activated aluminia, silica, titanium oxide, zirconium oxide, zeolite or activated carbon to form sulphur and release a purified gas stream containing substantially no sulphur compounds.

Process for recovering as sulfur the compounds H2S, SO2, COS and/or CS2 in a tail gas from a sulfur plant

A process for catalytically oxidizing H S contained in a gas directly to sulphur containing the following steps: combining the H S-containing gas with a gas containing free oxygen in an amount to produce an oxygen-enriched H S-containing gas having O /H S molar ratio ranging from about 0.05 to about 15; and contacting the oxygen-enriched H S-containing gas with a catalyst for selective oxidation of H S to sulphur, wherein the catalyst includes a catalytically active phase combined with a silicon carbide-based support and wherein the active phase of the catalyst consists of at least one oxysulphide of at least one metal selected from the group consisting of iron, copper, nickel, cobalt, chromium, molybdenum and tungsten, at a temperature above the dew point of sulphur formed during H S oxidation.

Process for oxidizing the H2S contained at low concentration in a gas directly to sulphur by catalytic means and in the vapour pause

An analyzer for continuously measuring the H S content of a gas stream which utilizes a drying module for drying the gas, a compressor for compressing the gas, a means for diluting the compressed sample and an electrical chemical sensor. The invention is also a device for regulating the flow rate of air to a H S oxidation system which utilizes the analyzer to control the ratio of air to H S stream entering the process.

Analyzer for measuring H2S and its use for a sulfur oxidation reactor

Method and catalyst for catalytically oxidizing a low concentration of

Process for oxidation of H.sub.2 S to sulphur

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