摘要:
The application relates to a process for the removal of hydrogen sulfide from a gas stream by catalytic direct oxidation without employing the combustion step of a Claus process. The process is particularly suitable for desulfurization of gas streams that contain hydrogen and allows sulfur recovery efficiency of better than 99%
摘要:
The present invention provides a process for the selective oxidation of hydrogen sulphide in a hydrogen sulphide-containing hydrocarbon and/or hydrogen feed gas to elemental sulphur, wherein the hydrogen sulphide- containing hydrocarbon and/or hydrogen feed gas and a sulphur dioxide-containing gas are supplied to a reaction zone comprising at least one catalytic zone comprising a TiO 2 -comprising catalyst, to form elemental sulphur and a gaseous stream depleted in hydrogen sulphide, in which process the Tiθ2-comprising catalyst of the at least one catalytic zone is contacted with hydrogen sulphide and/or sulphur dioxide at elevated pressure and at a temperature in the range of from 120 and below 160 °C, under such conditions that the elemental sulphur formed is essentially in liquid form, and wherein at least part of the sulphur dioxide comprising gas is obtained by combusting elemental sulphur to obtain a mixture of sulphur dioxide and nitrogen and concentrating the mixture of sulphur dioxide to increase the sulphur dioxide concentration.
摘要:
The invention provides a process for producing a gas stream depleted of H2S from a feed gas stream comprising H2S, the process comprising the steps of: (a) selectively oxidizing H2S by supplying the feed gas stream comprising H2S, an inert liquid medium and a molecular-oxygen comprising gas stream to a reaction zone comprising at least one catalytic zone comprising an oxidation catalyst and contacting the oxidation catalyst of each catalytic zone with the feed gas stream and/or the molecular-oxygen comprising gas stream in the presence of inert liquid medium at a temperature in the range of from 120 to 160 °C to form elemental sulphur and the gas stream depleted of H2S, under such conditions that the elemental sulphur formed is essentially in liquid form and is removed from the reaction zone with inert liquid medium to obtain a liquid stream comprising inert liquid medium and essentially liquid elemental sulphur; (b) optionally separating the liquid stream obtained in step (a) into a first liquid phase enriched in inert liquid medium and a second liquid phase enriched in liquid elemental sulphur; (c) combusting at least part of the liquid stream obtained in step (a) or at least part of the second liquid phase obtained in step (b) to form a fluid stream comprising sulphur dioxide.
摘要:
The invention relates to a process for the recovery of sulfur from a hydrogen sulfide containing gas, comprising (a) Oxidizing part of the hydrogen sulfide in a gaseous stream with oxygen or an oxygen containing gas in an oxidation stage to sulfur dioxide, and thereafter reacting the major part of the remaining hydrogen sulfide and the major part of sulfur dioxide to elemental sulfur and water, (b) reacting the product gas of oxidation stage a) in at least three catalytic reaction systems and c. selectively oxidizing H2S in the gas leaving stage b (in particular leaving) the (last) sub-dewpoint Claus reactor) to elemental sulfur, preferably employing for this purpose a catalytic stage including a selective oxidation catalyst, which is substantially insensitive to the presence of water vapor in the gas stream and is ineffective in promoting the establishment of the Claus equilibrium: 2 H2S + SO2 2 H2O + 3/n Sn.
摘要:
A process for the selective oxidation of hydrogen sulphide in a hydrogen sulphide containing feed gas to elemental sulphur, wherein the hydrogen sulphide containing feed gas (3), an inert liquid medium (5), and a molecular-Oxygen containing gas (4) are supplied to a reaction zone (1) comprising at least one catalytic zone (2) comprising an oxidation catalyst to form elemental sulphur and a gaseous stream depleted in hydrogen sulphide (8), in which process the oxidation catalyst. of each catalytic zone (2) is contacted with hydrogen sulphide and/or molecular-oxygen in the presence of inert liquid medium at a temperature in the range of from 120 to 160 oC, under such conditions that the elemental sulphur formed is essentially in liquid form and is removed from the reaction zone with the inert liquid medium.
摘要:
The invention relates to a process for the recovery of sulfur from a hydrogen sulfide containing gas, comprising (a) Oxidizing part of the hydrogen sulfide in a gaseous stream with oxygen or an oxygen containing gas in an oxidation stage to sulfur dioxide, and thereafter reacting the major part of the remaining hydrogen sulfide and the major part of sulfur dioxide to elemental sulfur and water, (b) reacting the product gas of oxidation stage a) in at least three catalytic reaction systems and c. selectively oxidizing H2S in the gas leaving stage b (in particular leaving) the (last) sub-dewpoint Claus reactor) to elemental sulfur, preferably employing for this purpose a catalytic stage including a selective oxidation catalyst, which is substantially insensitive to the presence of water vapor in the gas stream and is ineffective in promoting the establishment of the Claus equilibrium: 2 H2S + SO2 2 H2O + 3/n Sn.
摘要:
The invention provides a process for preparing a sulphur cement product comprising the following steps: (a) selectively oxidising hydrogen sulphide to elemental sulphur by contacting, in a reaction zone, a hydrogen sulphide containing feed gas and a molecular-oxygen containing gas with a particulate oxidation catalyst under selective oxidation conditions; (b) discharging a stream comprising liquid and/or solid elemental sulphur and particulate oxidation catalyst from the reaction zone; (c) admixing the stream comprising elemental sulphur and particulate oxidation catalyst with at least any one of elemental sulphur, a sulphur cement filler, a sulphur cement modifier, or aggregate at a temperature at which sulphur is molten; (d) solidifying the mixture obtained in step (c) by cooling it to a temperature below the melting temperature of sulphur to obtain the sulphur cement product. The invention further provides the use of a stream comprising elemental sulphur and particulate oxidation catalyst for preparing a sulphur cement product, which stream is obtained in selective oxidation step (a) of such process.
摘要:
The present invention relates to a supported catalyst system for the removal of sulfur compounds, such as H2S comprising a metal compound on a support material, wherein in said support material, the sum of the pore volume present in micro-pores and in mesopores is less than 0.20 ml per gram of catalyst, and wherein the pore volume V-Hg, as measured by mercury intrusion porosimetry, is at least 0.30 ml/g. The invention further relates to processes for desulfurization of gases containing sulfur compounds, such as H2S in which this catalyst system is used.
摘要:
The invention relates to a process for the recovery of sulfur from a hydrogen sulfide containing gas, comprising:
a. Oxidizing part of the hydrogen sulfide in a gaseous stream with oxygen or an oxygen containing gas in an oxidation stage to sulfur dioxide, and thereafter reacting the major part of the remaining hydrogen sulfide and the major part of sulfur dioxide to elemental sulfur and water, b. reacting the product gas of oxidation stage a) in at least three catalytic reaction systems and c. selectively oxidizing H 2 S in the gas leaving stage b (in particular leaving) the (last) sub-dewpoint Claus reactor) to elemental sulfur, preferably employing for this purpose a catalytic stage including a selective oxidation catalyst, which is substantially insensitive to the presence of water vapor in the gas stream and is ineffective in promoting the establishment of the Claus equilibrium: 2 H 2 S + SO 2 ⇔ 2 H 2 O + 3/n S n .