Dehydrogenation Catalyst
Dehydrogenation Catalyst
- Kutentha Kwambiri Dehydrogenation Catalytic Technology
Monga chitsulo okusayidi - chromium okusayidi - potaziyamu okusayidi amatha kupanga ethylbenzene (kapena n-butene) dehydrogenation mu styrene (kapena butadiene) pansi pa kutentha ndi kuchuluka kwa nthunzi yamadzi.
- otsika kutentha dehydrogenation chothandizira luso
Chifukwa chakuti dehydrogenation nthawi zambiri imayenera kuchitidwa pa kutentha kwambiri, kuchepetsedwa kapena pamaso pa zosakaniza zambiri, mphamvu yogwiritsira ntchito mphamvu imakhala yaikulu.M'zaka zaposachedwapa, oxidative dehydrogenation pa kutentha otsika wapangidwa.Monga polyethylene ndi bismuth - molybdenum zitsulo okusayidi chothandizira ndi oxidative dehydrogenation wa butadiene.
Hydrogenation chothandizirasichimagwiritsidwa ntchito popanga, komanso chimagwiritsidwa ntchito kwambiri poyeretsa zipangizo ndi zinthu.Malinga ndi zikhalidwe zosiyanasiyana za hydrogenation, zitha kugawidwa m'magulu atatu:
① Zothandizira zosankhidwa za hydrogenation, monga ethylene ndi propylene zomwe zimachokera ku petroleum hydrocarbon cracking monga polymerization zopangira, ziyenera kusankhidwa poyamba ndi hydrogenation, kuchotsa zonyansa monga alkyne, diene, carbon monoxide, carbon dioxide, oxygen, ndipo palibe kutaya kwa ene. .Chothandizira chomwe chimagwiritsidwa ntchito nthawi zambiri ndi palladium, platinamu kapena faifi tambala, cobalt, molybdenum, ndi zina zambiri, pa alumina.
② Chothandizira chosasankha cha hydrogenation, ndiko kuti, chothandizira chomwe chimagwiritsidwa ntchito popanga hydrogenation kupita kuzinthu zodzaza.Monga benzene hydrogenation kupita ku cyclohexane yokhala ndi nickel-alumina catalyst, phenol hydrogenation to cyclohexanol, imakhala ndi ditrile hydrogenation ku hexdiamine yokhala ndi nickel catalyst.
③ Chothandizira cha hydrogenation, monga copper chromate chothandizira kuti mafuta a hydrogenation apange ma alcohols apamwamba
Ndilo chothandizira choyambirira chophatikizana chomwe chimagwiritsidwa ntchito popanga mafakitale.Ma aldehydes okhala ndi atomu imodzi ya kaboni amapangidwa ndi momwe ma alkenes ali ndi syngas (CO + H2) pamaso pa chothandizira.Monga ethylene, propylene monga zopangira kudzera mu hydroformylation (ndiko kuti, amadziwika kuti carbonyl synthesis) propyl aldehyde, butyl aldehyde.Hydroformylation inkachitika mu gawo lamadzimadzi pa kutentha kwambiri komanso kuthamanga pogwiritsa ntchito carbonyl cobalt zovuta monga chothandizira.
Polyethylene amagawanika kukhala otsika osalimba komanso osalimba kwambiri.M'mbuyomu, akale ankagwiritsa ntchito njira yothamanga kwambiri (100 ~ 300MPa) kupanga, mpweya, organic peroxide monga chothandizira.Chotsatiracho chimapangidwa makamaka ndi njira yapakatikati kapena njira yochepetsera.Mu njira yapakatikati, chromium-molybdenum oxide imatengedwa pa silicon aluminium guluu ngati chothandizira.Mu njira yochepetsera mphamvu, chothandizira chamtundu wa Ziegler (choyimiridwa ndi titaniyamu tetrachloride ndi triethyl aluminium system) chimagwiritsidwa ntchito polima pa kutentha kochepa komanso kutsika kochepa.Polypropylene kupanga komanso anathandiza titaniyamu-zotayidwa dongosolo mkulu dzuwa chothandizira, pa gramu titaniyamu akhoza kutulutsa oposa 1000kg polypropylene.
Ndilo chothandizira choyambirira chophatikizana chomwe chimagwiritsidwa ntchito popanga mafakitale.Ma aldehydes okhala ndi atomu imodzi ya kaboni amapangidwa ndi momwe ma alkenes ali ndi syngas (CO + H2) pamaso pa chothandizira.Monga ethylene, propylene monga zopangira kudzera mu hydroformylation (ndiko kuti, amadziwika kuti carbonyl synthesis) propyl aldehyde, butyl aldehyde.Hydroformylation inkachitika mu gawo lamadzimadzi pa kutentha kwambiri komanso kuthamanga pogwiritsa ntchito carbonyl cobalt zovuta monga chothandizira.
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