GB2200621A - Treatment of gases - Google Patents
Treatment of gases Download PDFInfo
- Publication number
- GB2200621A GB2200621A GB08702688A GB8702688A GB2200621A GB 2200621 A GB2200621 A GB 2200621A GB 08702688 A GB08702688 A GB 08702688A GB 8702688 A GB8702688 A GB 8702688A GB 2200621 A GB2200621 A GB 2200621A
- Authority
- GB
- United Kingdom
- Prior art keywords
- compound
- gases
- barium
- strontium
- sulphate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Gas Separation By Absorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The product gas from a coal gasification process is contacted with a bed of barium compound and/or strontium compound hereby to reduce the HCl content. The barium compound may be barium sulphate and the strontium compound may be strontium sulphate.
Description
IMPROVEMENTS IN OR RELATING TO THE TREATMENT OF GASES
This invention concerns improvements in or relating to the treatment of gases.
The combustion or gasification of a fossil fuel such as coal, releases alkali salts which are present in the product gases as either a condensed phase or a vapour phase. High alkali levels are -# > , #P undesirable particularly in view of their corrosive effect. The phase in which they occur will determine the method of their removal.
In the case of combustion gases, the alkalis are present principally as condensed phases, with low vapour phase concentrations, and can therefore be removed by filtration together with the particulate contaminants. However, when the alkalis are predominantly present as vapour species, it becomes necessary to react or adsorb them onto suitable 'getter' materials to effect their removal.
The gas produced from the gasification of coal contains not only a high level of alkalis but also a significantly high concentration of hydrogen chloride. Unfortunately, the 'gettering' reaction also produces HC1 and therefore the equilibrium of that reaction is displaced disadvantageously. The removal of HC1 before the gettering reaction would thus lead to more efficient alkali extraction from the product gas.
An object of the present invention is therefore to provide a method of treating gases whereby their hydrogen chloride content is reduced.
Accordingly the invention provides a method of treating gases including the step of contacting the gases with a barium compound and/or a strontium compound.
The gases to be treated by such contact are at an elevated temperature in the range for example of 8000C to 10000C and the barium compound and/or strontium compound will be employed either as a treatment bed which may be fixed or fluidised, or injected before a particulate filter.
The barium compound may be barium sulphate or carbonate and the strontium compound may be strontium sulphate or carbonate.
Materials naturally containing either one or both of barium and strontium compounds may be employed in the method of the invention.
The treatment bed or injected material may comprise the compound(s) only or in combination with a getter material to afford a single pass cleaning stage for the gases to be treated.
In an example of putting into experimental practice the method of the present invention, gas from a fluidised bed gasifier at a temperature of between 8000C and 10000C was passed through an efficient dust separator and thence through an alkali gettering reactor. The arrangement was such that a layer of barytes (barium sulphate) was interposed before the gettering material which was pyrophyllite. Whereas at the inlet, gas analysis showed a hydrogen chloride content of 414 vpm,at the outlet, the content had reduced to 21 vpm.
The use of barium sulphate in this experimental test then resulted in a reduction of HCl of 95%.
Claims (8)
1. A method of treating gases including the step of contacting the
gases with a barium compound and/or a strontium compound.
2. A method of according to claim 1 which the gases are the product
of coal gasification.
3. A method of according to claim 1 or 2 in which the temperature
of the gases lies in the range of 8000C to 10000C.
4. A method of according to any one of the preceding claims in
which the compound(s) is/are formed into a treatment bed.
5. A method according to claim 4 in which the treatment bed is
fixed or is a fluidised bed.
6. A method according to any one of the preceding claims in which
the barium compound is barium sulphate and the strontium
compound is strontium sulphate.
7. A method according to claims 4 and 5 in which the treatment bed
comprises the barium compound and/or the strontium compound
together with a getter material.
8. A method of treating gases substantially as hereinbefore
described with reference to the Example.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08702688A GB2200621A (en) | 1987-02-06 | 1987-02-06 | Treatment of gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08702688A GB2200621A (en) | 1987-02-06 | 1987-02-06 | Treatment of gases |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8702688D0 GB8702688D0 (en) | 1987-03-11 |
| GB2200621A true GB2200621A (en) | 1988-08-10 |
Family
ID=10611818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08702688A Pending GB2200621A (en) | 1987-02-06 | 1987-02-06 | Treatment of gases |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2200621A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5888465A (en) * | 1994-09-19 | 1999-03-30 | Hoechst Aktiengesellschaft | Process for separating hydrogen halides from gases containing sulphur dioxide |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB276687A (en) * | 1926-08-30 | 1928-11-26 | Gewerkschaft Der Steinkohlenze | An improved process for purifying hydrogen and gases containing hydrogen |
| GB384392A (en) * | 1932-06-22 | 1932-12-08 | Cargo Fleet Iron Company Ltd | Improvements in the production of ammonium sulphate from coke oven gas and other gasefrom the distillation of coal |
| GB624848A (en) * | 1945-10-01 | 1949-06-17 | Donald Frederick Barratt | Improvements in or relating to methods for treating corrosive gases to render them innocuous |
| GB812134A (en) * | 1955-04-07 | 1959-04-22 | Baumann Friedrich | Process for removal of carbon dioxide and (where necessary) hydrogen sulphide from gases containing these constituents |
| GB812795A (en) * | 1955-04-07 | 1959-04-29 | Baumann Friedrich | Process for producing a technically pure soda |
| GB822494A (en) * | 1955-07-27 | 1959-10-28 | Electro Chimie Metal | Separation of hydrofluoric and hydrochloric acid gases |
| GB1144071A (en) * | 1965-02-10 | 1969-03-05 | Grillo Werke Ag | Process for the removal of sulphur-containing compounds from industrial gases |
| GB1336084A (en) * | 1972-01-19 | 1973-11-07 | Bp Chem Int Ltd | Removal of mercury from gas streams |
| GB1350700A (en) * | 1970-07-23 | 1974-04-18 | Anti Pollution Systems | Method of catalytically inducing oxidation of carbonaceous materials by the use of molten salts |
| GB1407016A (en) * | 1971-12-01 | 1975-09-24 | Basic Inc | Process for removing sulphur dioxide from gases |
| GB1411832A (en) * | 1973-10-22 | 1975-10-29 | Occidental Petroleum Corp | Process for removing sulphur dioxide from gas streams |
| GB1432656A (en) * | 1972-10-06 | 1976-04-22 | Mitsubishi Metal Mining Co Ltd | Disposal of nitrogen oxides in gaseous mixtures |
| GB1433762A (en) * | 1972-06-16 | 1976-04-28 | Princeton Chemical Res Inc | Mehtod of removing nitrogen and other oxides from gas streams |
| GB1456551A (en) * | 1973-04-09 | 1976-11-24 | Kobe Steel Ltd | Process to remove so2 gas |
| GB1505918A (en) * | 1975-03-21 | 1978-04-05 | Pennwalt Corp | Removal |
| GB1571055A (en) * | 1976-01-21 | 1980-07-09 | Du Pont | Controlled scrubbing of effluent gases containing waste halides |
| EP0045170A1 (en) * | 1980-07-29 | 1982-02-03 | Katalistiks International, Incorporated | A process for combusting sulfur-containing material, a hydrocarbon conversion process including such a combustion process in a catalyst regeneration step and a composition suitable for use as a catalyst in the hydrocarbon conversion process |
| GB2114911A (en) * | 1982-02-01 | 1983-09-01 | Takeda Chemical Industries Ltd | Treating sulpher-containing gases |
-
1987
- 1987-02-06 GB GB08702688A patent/GB2200621A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB276687A (en) * | 1926-08-30 | 1928-11-26 | Gewerkschaft Der Steinkohlenze | An improved process for purifying hydrogen and gases containing hydrogen |
| GB384392A (en) * | 1932-06-22 | 1932-12-08 | Cargo Fleet Iron Company Ltd | Improvements in the production of ammonium sulphate from coke oven gas and other gasefrom the distillation of coal |
| GB624848A (en) * | 1945-10-01 | 1949-06-17 | Donald Frederick Barratt | Improvements in or relating to methods for treating corrosive gases to render them innocuous |
| GB812134A (en) * | 1955-04-07 | 1959-04-22 | Baumann Friedrich | Process for removal of carbon dioxide and (where necessary) hydrogen sulphide from gases containing these constituents |
| GB812795A (en) * | 1955-04-07 | 1959-04-29 | Baumann Friedrich | Process for producing a technically pure soda |
| GB822494A (en) * | 1955-07-27 | 1959-10-28 | Electro Chimie Metal | Separation of hydrofluoric and hydrochloric acid gases |
| GB1144071A (en) * | 1965-02-10 | 1969-03-05 | Grillo Werke Ag | Process for the removal of sulphur-containing compounds from industrial gases |
| GB1350700A (en) * | 1970-07-23 | 1974-04-18 | Anti Pollution Systems | Method of catalytically inducing oxidation of carbonaceous materials by the use of molten salts |
| GB1407016A (en) * | 1971-12-01 | 1975-09-24 | Basic Inc | Process for removing sulphur dioxide from gases |
| GB1336084A (en) * | 1972-01-19 | 1973-11-07 | Bp Chem Int Ltd | Removal of mercury from gas streams |
| GB1433762A (en) * | 1972-06-16 | 1976-04-28 | Princeton Chemical Res Inc | Mehtod of removing nitrogen and other oxides from gas streams |
| GB1432656A (en) * | 1972-10-06 | 1976-04-22 | Mitsubishi Metal Mining Co Ltd | Disposal of nitrogen oxides in gaseous mixtures |
| GB1456551A (en) * | 1973-04-09 | 1976-11-24 | Kobe Steel Ltd | Process to remove so2 gas |
| GB1411832A (en) * | 1973-10-22 | 1975-10-29 | Occidental Petroleum Corp | Process for removing sulphur dioxide from gas streams |
| GB1505918A (en) * | 1975-03-21 | 1978-04-05 | Pennwalt Corp | Removal |
| GB1571055A (en) * | 1976-01-21 | 1980-07-09 | Du Pont | Controlled scrubbing of effluent gases containing waste halides |
| EP0045170A1 (en) * | 1980-07-29 | 1982-02-03 | Katalistiks International, Incorporated | A process for combusting sulfur-containing material, a hydrocarbon conversion process including such a combustion process in a catalyst regeneration step and a composition suitable for use as a catalyst in the hydrocarbon conversion process |
| GB2114911A (en) * | 1982-02-01 | 1983-09-01 | Takeda Chemical Industries Ltd | Treating sulpher-containing gases |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5888465A (en) * | 1994-09-19 | 1999-03-30 | Hoechst Aktiengesellschaft | Process for separating hydrogen halides from gases containing sulphur dioxide |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8702688D0 (en) | 1987-03-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3876393A (en) | Method and article for removing mercury from gases contaminated therewith | |
| EP0496563B1 (en) | Simultaneous removal of residual impurities and moisture from a gas | |
| GB2165466B (en) | A method and plant for cooling gases and removing dust from them | |
| DE3060557D1 (en) | A method of purifying gas containing gaseous mercury and gaseous hydrogen chloride | |
| US4908195A (en) | Process of purifying exhaust gas | |
| SE9404061D0 (en) | Ways of separating substances through dry adsorption from a gaseous medium | |
| US4983277A (en) | Process for the production of natural gas condensate having a reduced amount of mercury from a mercury-containing natural gas wellstream | |
| KR19990038272A (en) | Wet recycling process of impregnated activated carbon by organic solvent extraction method | |
| CA2153256A1 (en) | A packed bed and process for removal of residual mercury from gaseous hydrocarbons | |
| US4522730A (en) | Process for the treatment of an aqueous condensate | |
| US4073862A (en) | Process for removing ammonia, hydrogen sulfide and hydrocyanic acid from gases | |
| GB2200621A (en) | Treatment of gases | |
| DK606386A (en) | PROCEDURE FOR THE REMOVAL OF HARMFUL MATERIALS FROM COGAS | |
| GB2095655A (en) | Treating combustion waste gas | |
| JPS57111203A (en) | Method of treating industrial gas current | |
| US3275403A (en) | Removal of carbon dioxide and hydrogen sulfide from gaseous mixtures | |
| CA1304915C (en) | Method for the removal of ticl -vapour from gas-streams | |
| SE8401631D0 (en) | SET FOR DISPOSAL OF HC1 AND SO 712 CLOCK GAS | |
| RU96104266A (en) | METHOD FOR REGULATING CHLORINE EQUILIBRIUM IN PROCESSING SULFATE CELLULOSE | |
| US4176165A (en) | Treatment of alkyl lead-containing gas stream | |
| US3667908A (en) | Removal and recovery of sulfur oxides from gases | |
| US5209913A (en) | Process for the production of natural gas condensate having a reduced amount of mercury from a mercury-containing natural gas wellstream | |
| US4976933A (en) | Hydrogen stream purification | |
| US2759797A (en) | Process for separating hydrogen cyanide from acidic gaseous mixtures | |
| US3337302A (en) | Desulfurization of chlorine |