SU386661A1 - CATALYST FOR SELECTIVE GAS CLEANING FROM NITROGEN OXIDES - Google Patents
CATALYST FOR SELECTIVE GAS CLEANING FROM NITROGEN OXIDESInfo
- Publication number
- SU386661A1 SU386661A1 SU1420341A SU1420341A SU386661A1 SU 386661 A1 SU386661 A1 SU 386661A1 SU 1420341 A SU1420341 A SU 1420341A SU 1420341 A SU1420341 A SU 1420341A SU 386661 A1 SU386661 A1 SU 386661A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- catalyst
- nitrogen oxides
- gas cleaning
- selective gas
- hours
- Prior art date
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- Catalysts (AREA)
Description
1one
Изобретение относитс к каталитическим способам очистки отход щих газов от окислов азота, выбрасываемых в атмосферу в различных производствах, - азотной кислоты, некоторых катализаторов, нитрита аммони дл капролактама, р да производств органического синтеза и др.This invention relates to catalytic methods for purifying waste gases from nitrogen oxides released into the atmosphere in various industries — nitric acid, certain catalysts, ammonium nitrite for caprolactam, a number of organic synthesis industries, and others.
Известен катализатор дл селективной очистки газов от окислов азота, состо щий из окислов щелочных металлов и/или окиси бари на носителе, например окиси магни .A known catalyst for the selective purification of gases from nitrogen oxides, consisting of alkali metal oxides and / or barium oxide on a carrier, for example, magnesium oxide.
Однако при этом отмечаетс невысока степень очистки газа.However, there is a low degree of gas purification.
С целью повышени степени очистки газов предложен катализатор, активна фаза которого содержит 1,0-2,0 вес. % К, Na, Си, Zn, а в качестве носител вз то 98,0-99,0 вес. % РегОз.In order to increase the degree of gas purification, a catalyst has been proposed, the active phase of which contains 1.0-2.0 wt. % K, Na, Cu, Zn, and 98.0-99.0 wt. As a carrier. % RegOz.
Этот катализатор позвол ет повысить степень конверсии до 95,0-95,5% при 330-400°С и избытке аммиака не более 20-25% против стехиометрического.This catalyst allows to increase the degree of conversion to 95.0-95.5% at 330-400 ° C and an excess of ammonia of no more than 20-25% against stoichiometric.
Дл получени катализатора берут раствор, сульфата железа с добавками Na, К, Си и Zn возможно большей чистоты, к которому припивают раствор гидрата аммони до выпадени осадка. Затем раствор подогревают, осадку дают отсто тьс и жидкость декантируют. Затем осадок промывают до полного удалени ионов SO4 и сушат в течение 5 час при температуре до 200°С. Полученный порошок прессуют в таблетки размером 5X5 мм, а затем в течение 2 час прокаливают при температуре до 600°С. Полученный катализатор перед работой в контактном аппарате восстанавливают в течение 3-5 час в токе водорода или азотно-водородной смеси при 300- 350°С и объемной скорости 1000-2000 час . При этом катализаторе степень разложени окислов азота 95-96% при объемных скорост х 10000-40000 час температуре контактировани 330-400°С и избытке аммиака 20-25% против стехиометрического при содержании в газах до 3-5% кислорода.In order to obtain a catalyst, a solution is taken of ferrous sulfate with additives of Na, K, Cu and Zn of the highest purity possible, to which a solution of ammonium hydrate is added to the precipitate. The solution is then heated, the precipitate is allowed to settle and the liquid is decanted. Then the precipitate is washed until all the SO4 ions are completely removed and dried for 5 hours at a temperature of up to 200 ° C. The resulting powder is pressed into tablets of size 5X5 mm, and then calcined for 2 hours at temperatures up to 600 ° C. The catalyst obtained, before operating in a contact apparatus, is reduced within 3-5 hours in a stream of hydrogen or a nitrogen-hydrogen mixture at 300-350 ° C and a space velocity of 1000-2000 hours. In this catalyst, the degree of decomposition of nitrogen oxides is 95-96% at volumetric speeds of 10,000-40000 hours and the contact temperature is 330-400 ° C and an excess of ammonia of 20-25% versus stoichiometric content of up to 3-5% oxygen in gases.
Предмет изобретени Subject invention
Катализатор дл селективной очистки газов от окислов азота, состо щий из активной фазы, включающей щелочной металл, и носител , отличающийс тем, что, с целью повышени степени очистки газа, активна фазаA catalyst for the selective purification of gases from nitrogen oxides, consisting of an active phase comprising an alkali metal and a carrier, characterized in that, in order to increase the degree of gas purification, the active phase
содержит 1,0-2,0 вес. % К, Na, Си, Zn, а в качестве носител вз то 98,0-99,0 вес. % РегОз.contains 1.0-2.0 weight. % K, Na, Cu, Zn, and 98.0-99.0 wt. As a carrier. % RegOz.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1420341A SU386661A1 (en) | 1970-03-27 | 1970-03-27 | CATALYST FOR SELECTIVE GAS CLEANING FROM NITROGEN OXIDES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1420341A SU386661A1 (en) | 1970-03-27 | 1970-03-27 | CATALYST FOR SELECTIVE GAS CLEANING FROM NITROGEN OXIDES |
Publications (1)
Publication Number | Publication Date |
---|---|
SU386661A1 true SU386661A1 (en) | 1973-06-21 |
Family
ID=20451313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1420341A SU386661A1 (en) | 1970-03-27 | 1970-03-27 | CATALYST FOR SELECTIVE GAS CLEANING FROM NITROGEN OXIDES |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU386661A1 (en) |
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1970
- 1970-03-27 SU SU1420341A patent/SU386661A1/en active
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