PL111383B2 - Gas desulfurization process employing the seabord method - Google Patents
Gas desulfurization process employing the seabord method Download PDFInfo
- Publication number
- PL111383B2 PL111383B2 PL20720878A PL20720878A PL111383B2 PL 111383 B2 PL111383 B2 PL 111383B2 PL 20720878 A PL20720878 A PL 20720878A PL 20720878 A PL20720878 A PL 20720878A PL 111383 B2 PL111383 B2 PL 111383B2
- Authority
- PL
- Poland
- Prior art keywords
- seabord
- sodium carbonate
- gas desulfurization
- solution
- desulfurization process
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 7
- 238000006477 desulfuration reaction Methods 0.000 title claims description 4
- 230000023556 desulfurization Effects 0.000 title claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 26
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 5
- 238000004821 distillation Methods 0.000 claims description 4
- 239000000243 solution Substances 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 7
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 6
- 235000019345 sodium thiosulphate Nutrition 0.000 description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000002745 absorbent Effects 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 1
- 239000004133 Sodium thiosulphate Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000009739 binding Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- IHYNKGRWCDKNEG-UHFFFAOYSA-N n-(4-bromophenyl)-2,6-dihydroxybenzamide Chemical compound OC1=CC=CC(O)=C1C(=O)NC1=CC=C(Br)C=C1 IHYNKGRWCDKNEG-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Description
Przedmiotem wynalazku jest sposób odsiarczania gazów metoda Seaborda. Dotychczas w metodzie Seabor¬ da absorbentern siarkowodoru jest 3—5% wodny roztwór weglanu sodu. Ilosc siarkowodoru usunietego z gazu metoda Seaborda wynosi 80-90%.Z reakcji jakie zachodza w czesci absorbcyjnej procesu, najwazniejsza jest reakcja odwracalna wiazania siarkowodoru Na2 Co3 + H2 S ^ NaHS + NaHC03 Regeneracja zuzytego absorbenta polega na przedmuchiwaniu go powietrzem.Obok reakcji regeneracji zachodza reakcje uboczne. Najwazniejsza z nich to reakcja utleniania wodorosiar- czku sodu : 2 NaHS + 202 = Na2 S203 + H2 O W wyniku tej reakcji 10-15% wodorosiarczku sodu utlenia sie do tiosiarczanu sodu. Gromadzenie sie w absorbencie tiosiarczanu sodu kosztem weglanu sodu jest zjawiskiem niekorzystnym, poniewaz zmniejszajego pojemnosc chlonna. Stwarza to koniecznosc periodycznego odprowadzania czesci roztworu i wprowadzenia na jego miejsce swiezego roztworu weglanu sodu.Celem wynalazku jest obnizenie szybkosci powstawania tiosiarczanu sodu podczas regeneracji roztworu weglanu sodu po absorbcji siarkowodoru.Istota wynalazku polega na tym, ze jako roztwór absorbujacy stosuje sie weglan sodu rozpuszczony w cieczy wyczerpanej z destylacji metanolu w ilosci 2—8% wagowych weglanu sodu. Ciecz wyczerpana jest roz¬ tworem zawierajacym 2-3% CH3OH, oraz zwiazki organiczne w ilosci do 1% takie jak: HCHO, CH3OCH3, CnH2n + lOH, CnH2n5 + iCHQ, W tak przygotowanym roztworze absorbujacym szybkosc tworzenia sie tiosiar¬ czanu sodu jest 8—9 razy mniejsza od szybkosci tworzenia sie tiosiarczanu sodu przy stosowaniu wodnego roztworu weglanu sodu.2 111383 Przyklad. Przygotowano roztwór zawierajacy w 100 g roztworu 4 g weglanu sodu przez rozpuszcze¬ nie weglanu sodu w cieczy wyczerpanej z destylacji metanolu.Przy odsiarczaniu gazu o skladzie: CO - 32,6% CH4 - 0,4% H2 - 32,3% N2 - 27,2% H2S - 0,3% tak przygotowanym roztworem, szybkosc tworzenia sie tiosiarczanu jest 9 razy mniejsza w porównaniu z szybko¬ scia tworzenia sie tiosiarczanu sodu, gdy rozpuszczalnikiem weglanu sodu jest woda.Zastrzezenie patentowe Sposób odsiarczania gazów metoda Seaborda, znamienny tym, ze jako roztwór absorbujacy stosuje sie weglan sodu rozpuszczony w cieczy wyczerpanej z destylacji metalnolu w ilosci 2-8% wagowych weglanu sodu.Prac. Poligraf. UP PRL naklad 120+18 Cena 45 zl PLThe subject of the invention is the Seabord gas desulfurization method. Hitherto, in the Seaborda method, the hydrogen sulphide absorbent is a 3-5% aqueous solution of sodium carbonate. The amount of hydrogen sulphide removed from the gas by the Seabord method is 80-90%. From the reactions that take place in the absorption part of the process, the most important is the reversible hydrogen sulphide binding reaction Na2 Co3 + H2 S ^ NaHS + NaHC03 Regeneration of the spent absorbent consists in blowing it with air. side reactions. The most important of them is the oxidation reaction of sodium bisulfide: 2 NaHS + 202 = Na2 S2O3 + H2O As a result of this reaction, 10-15% of sodium hydrosulfide is oxidized to sodium thiosulfate. Accumulation of sodium thiosulphate in the absorbent at the expense of sodium carbonate is a disadvantageous phenomenon as it reduces the absorbent capacity. This makes it necessary to periodically drain a part of the solution and replace it with fresh sodium carbonate solution. The aim of the invention is to reduce the rate of sodium thiosulfate formation during the regeneration of the sodium carbonate solution after the absorption of hydrogen sulfide. the liquid exhausted from the distillation of methanol in an amount of 2 to 8% by weight of sodium carbonate. The liquid is exhausted with a solution containing 2-3% CH3OH, and organic compounds in the amount of up to 1%, such as: HCHO, CH3OCH3, CnH2n + lOH, CnH2n5 + iCHQ. In such a prepared solution absorbing the rate of formation of sodium thiosulfate is 8 —9 times lower than the sodium thiosulfate formation rate when using an aqueous solution of sodium carbonate.2 111383 Example. A solution was prepared containing 4 g of sodium carbonate per 100 g solution by dissolving sodium carbonate in the liquid depleted from methanol distillation. In desulfurization of a gas composed of: CO - 32.6% CH4 - 0.4% H2 - 32.3% N2 - 27.2% H2S - 0.3% with the solution prepared in this way, the rate of thiosulfate formation is 9 times lower compared to the rate of sodium thiosulfate formation when the sodium carbonate solvent is water. that sodium carbonate dissolved in the liquid depleted from metallnol distillation in an amount of 2-8% by weight sodium carbonate is used as the absorbing solution. Typographer. UP PRL, circulation 120 + 18 Price PLN 45 PL
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL20720878A PL111383B2 (en) | 1978-05-29 | 1978-05-29 | Gas desulfurization process employing the seabord method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL20720878A PL111383B2 (en) | 1978-05-29 | 1978-05-29 | Gas desulfurization process employing the seabord method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL207208A1 PL207208A1 (en) | 1979-03-26 |
| PL111383B2 true PL111383B2 (en) | 1980-08-30 |
Family
ID=19989582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL20720878A PL111383B2 (en) | 1978-05-29 | 1978-05-29 | Gas desulfurization process employing the seabord method |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL111383B2 (en) |
-
1978
- 1978-05-29 PL PL20720878A patent/PL111383B2/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL207208A1 (en) | 1979-03-26 |
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