Qhov sib txawv tseem ceeb ntawm cov txheej txheem lead chamber thiab cov txheej txheem kev sib cuag yog cov txheej txheem chamber siv cov pa roj nitrogen oxides ua cov catalyst, hos cov txheej txheem kev sib cuag siv vanadium pentoxide.
Cov txheej txheem coj chamber thiab cov txheej txheem sib cuag yog cov txheej txheem tseem ceeb uas peb siv rau kev tsim cov sulfuric acid hauv cov nplai loj. Txawm li cas los xij, cov txheej txheem txhuas chamber yog cov txheej txheem qub, thiab tam sim no nws tau hloov pauv los ntawm cov txheej txheem kev sib cuag. Nws yog vim tias cov txheej txheem kev sib cuag yog kev lag luam ntau dua thiab siv cov catalysts tsis tshua kim; Tsis tas li ntawd xwb, cov txheej txheem no tsim cov sulfur trioxide thiab oleum ib yam nkaus.
Tus Txheej Txheem Lead Chamber yog dab tsi?
Lead chamber txheej txheem yog cov txheej txheem qub ntawm kev tsim cov sulfuric acid hauv cov nplais kev lag luam. Txawm li cas los xij, nws tseem ua tau raws li 25% ntawm tam sim no sulfuric acid ntau lawm. Txawm li cas los xij, txoj kev no tsis yog nrov heev nyob rau tam sim no vim yog cov nqi tsim khoom siab piv rau qhov kawg tshwm sim.
Daim duab 01: Kev tsim cov sulfuric acid los ntawm txawv teb chaws
Ntxiv mus, cov txheej txheem no siv gaseous nitrogen oxide ua cov catalyst. Nyob rau hauv tus txheej txheem, peb yuav tsum qhia sulfur dioxide rau hauv cov chav loj nrog rau chav thiab nitrogen dioxide. Cov chav loj no yog lined nrog cov ntawv txhuas. Nyob rau hauv lub chambers, muaj ib tug system uas txau cov gases nrog rau dej thiab camber acid. Feem ntau, lub chamber acid peb siv yog 70% sulfuric acid. Tom qab ntawd peb yuav tsum cia cov sulfur dioxide thiab nitrogen dioxide yaj hauv dej rau 30 feeb. Nitrogen dioxide speeds cov tshuaj tiv thaiv tab sis tsis noj thaum lub sij hawm kev loj hlob ntawm cov tshuaj tiv thaiv. Nyob rau hauv lub chamber no, sulfur dioxide oxidizes rau hauv sulfuric acid. Txawm li cas los xij, cov txheej txheem no yog exothermic heev thiab tso tawm lub zog kub kub.
Kev Sib cuag yog dab tsi?
Cov txheej txheem tiv tauj yog txoj kev niaj hnub ntawm kev tsim cov sulfuric acid hauv ntau qhov chaw hauv kev lag luam. Tsis tas li ntawd, txoj kev no tsim sulfuric acid nyob rau hauv siab concentration. Yav dhau los, tib neeg siv platinum ua cov tshuaj tiv thaiv, tab sis vim yog tus nqi siab, tam sim no peb siv vanadium pentoxide. Qhov tseem ceeb ntawm cov txheej txheem no yog tias nws tsim cov sulfur trioxide thiab oleum ib yam nkaus, thiab cov txheej txheem yog tus nqi zoo heev.
Hauv cov txheej txheem, thawj kauj ruam suav nrog kev sib xyaw cov sulfur nrog oxygen los tsim cov sulfur dioxide. Tom qab ntawd peb yuav tsum tau ntxuav cov sulfur dioxide uas tsim los ntawm ib chav purifying. Tom ntej no, peb yuav tsum ntxiv cov pa ntau dhau rau cov sulfur dioxide nyob rau hauv lub xub ntiag ntawm vanadium pentoxide catalyst. Cov kauj ruam no tsim sulfur trioxide. Tom qab ntawd cov sulfur trioxide ntxiv rau sulfuric acid. Nws muab oleum, uas yog disulfuric acid. Cov kauj ruam kawg yog ntxiv oleum rau hauv dej, uas muab sulfuric acid nyob rau hauv ib tug heev concentrated daim ntawv.
Dab tsi yog qhov txawv ntawm Lead Chamber Process thiab Kev Sib cuag?
Nws muaj ob txoj haujlwm tseem ceeb uas peb siv rau kev tsim cov sulfuric acid: cov txheej txheem txhuas chamber thiab cov txheej txheem tiv tauj. Qhov sib txawv tseem ceeb ntawm cov txheej txheem lead chamber thiab cov txheej txheem kev sib cuag yog tias cov txheej txheem chamber siv cov pa roj carbon monoxide los ua cov khoom siv hluav taws xob, thaum cov txheej txheem sib cuag siv vanadium pentoxide. Tsis tas li ntawd, cov reactants rau cov txheej txheem lead chamber yog sulfur trioxide thiab chav thaum cov reactants rau cov txheej txheem sib cuag yog sulfur, oxygen thiab cov huab cua noo. Ntxiv mus, cov khoom kawg ntawm cov txheej txheem lead chamber yog sulfuric acid, tab sis cov txheej txheem hu ua sulfur trioxide thiab oleum ib yam nkaus. Yog li, qhov no kuj yog qhov sib txawv ntawm cov txheej txheem txhuas chamber thiab cov txheej txheem tiv tauj.
Summary – Lead Chamber Process vs Contact Process
Muaj ob txoj haujlwm tseem ceeb rau kev tsim cov sulfuric acid: cov txheej txheem ua cov hlau lead thiab cov txheej txheem tiv tauj. Qhov sib txawv tseem ceeb ntawm cov txheej txheem lead chamber thiab cov txheej txheem kev sib cuag yog tias cov txheej txheem chamber siv cov pa roj carbon monoxide ua cov khoom siv, thaum cov txheej txheem tiv tauj siv vanadium pentoxide.
