Qhov sib txawv tseem ceeb ntawm catalytic cracking thiab hydrocracking yog tias catalytic cracking cuam tshuam nrog carbon rejection, whereas hydrocracking koom nrog ib tug ntxiv hydrogen txheej txheem.
Cov txheej txheem tawg yog qhov tseem ceeb heev hauv cov roj av refineries thiab pab hloov cov molecules loj rau cov tebchaw me, uas ua rau nce qhov ntsuas octane ntawm cov roj av. Catalytic cracking, los yog ntau precisely kua catalytic cracking, yog hloov dua siab tshiab ntawm hydrocarbons nrog kub boiling ntsiab lus thiab siab molecular hnyav rau hauv roj av, olefinic gases, thiab lwm yam roj av khoom. Hydrocracking yog cov txheej txheem ntawm kev hloov cov dej kub npau npau rau hauv cov dej npau npau tsawg.
Catalytic Cracking yog dab tsi?
Catalytic cracking, los yog ntau precisely kua catalytic cracking, yog hloov dua siab tshiab ntawm boiling point, siab molecular hnyav hydrocarbons rau hauv roj av, olefinic gases, thiab lwm yam roj av khoom. Qhov no yog ib txoj kev hloov dua siab tshiab pab tau hauv cov roj av refineries. Muaj qhov kub kub kub, siab molecular hnyav feem ntawm cov roj crude (petroleum) uas undergoes catalytic cracking.
Daim duab 01: Cov Txheej Txheem Siv rau Catalytic Cracking ntawm kua
Keeb kwm, cov txheej txheem tawg ntawm cov roj av tau ua tiav siv cov txheej txheem thermal. Txawm li cas los xij, tam sim no nws tau hloov loj los ntawm catalytic cracking. Qhov no yog vim hais tias tom kawg yields ib tug ntau dua ntim ntawm siab octane ntsuam xyuas roj av. Ntxiv mus, nws tsim cov pa roj carbon monoxide ntau dua=carbon ob daim ntawv cog lus, xws li olefins. Yog li ntawd, catalytic cracking yog kev lag luam ntau dua li cov txheej txheem thermal tawg.
Rau cov kua dej catalytic cracking txheej txheem, feedstock yog hnyav roj roj. Nws yog ib feem ntawm cov roj av uas muaj qhov kub thiab txias ntawm 340 degrees Celsius lossis siab dua. Ntxiv mus, qhov hnyav molecular yog li ntawm 200 txog 600 lossis siab dua hauv cov seem no.
Hydrocracking yog dab tsi?
Hydrocracking yog txheej txheem ntawm kev hloov cov dej kub npau npau rau hauv cov dej npau npau qis. Qhov ntawd txhais tau hais tias cov reactants ntawm hydrocracking cov tshuaj tiv thaiv yog cov khoom siv roj av uas muaj cov ntsiab lus kub kub, thiab cov khoom yog cov tebchaw uas muaj cov ntsiab lus kub tsawg. Tsis tas li ntawd, cov txheej txheem no tseem ceeb heev vim tias cov khoom qis qis yog cov khoom muaj txiaj ntsig ntau dua, uas suav nrog roj av, roj av, roj av, roj av, thiab lwm yam.
Daim duab 02: Hydrocracking Cog
Cov txheej txheem ntawm hydrocracking yog lub npe xws li vim tias kev tawg ntawm cov molecules loj tshwm sim nyob rau hauv muaj cov pa roj hydrogen. Feem ntau, hydrocracking yog ua nyob rau hauv cov mob hnyav. Nws yog vim hais tias cov reactants ntawm hydrocracking feedstock raug rau reactor kub ntev.
Peb tuaj yeem txhais cov txheej txheem no raws li hom catalytic tawg vim nws kuj siv lub catalyst kom ceev cov txheej txheem; ib tug hlau catalyst. Feem ntau, cov txheej txheem no muab saturated hydrocarbons. Txawm li cas los xij, hom hydrocarbon muab yog nyob ntawm cov kev mob tshwm sim, uas suav nrog qhov kub ntawm cov tshuaj tiv thaiv sib xyaw, siab, thiab kev ua haujlwm catalytic. Cov khoom muaj xws li ethane, LPG, thiab isoparaffins.
Qhov txawv ntawm Catalytic Cracking thiab Hydrocracking yog dab tsi?
Cov txheej txheem tawg yog qhov tseem ceeb hauv cov roj av refineries thiab pab hloov cov molecules loj rau hauv cov tebchaw me me, uas ua rau nce qhov ntsuas octane ntawm cov roj av. Qhov sib txawv tseem ceeb ntawm catalytic cracking thiab hydrocracking yog tias catalytic cracking cuam tshuam nrog carbon rejection, whereas hydrocracking koom nrog hydrogen ntxiv txheej txheem. Ntxiv mus, catalytic cracking yog txheej txheem endothermic thaum hydrocracking yog txheej txheem exothermic.
Cov hauv qab no qhia txog qhov sib txawv ntawm catalytic cracking thiab hydrocracking hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Catalytic Cracking vs Hydrocracking
Catalytic cracking, los yog ntau precisely, kua catalytic cracking, yog hloov dua siab tshiab ntawm boiling point, siab molecular hnyav hydrocarbons rau hauv roj av, olefinic gases, thiab lwm yam roj av khoom. Hydrocracking yog cov txheej txheem ntawm kev hloov cov dej kub npau npau rau hauv cov dej npau npau tsawg. Qhov sib txawv tseem ceeb ntawm catalytic cracking thiab hydrocracking yog tias catalytic cracking cuam tshuam nrog carbon rejection, whereas hydrocracking koom nrog hydrogen ntxiv txheej txheem.
