HEMISKI Zbirka re{eni zada~i REAKTORI 3

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Prv del. Definicii, koncepti, stehiometriski tablici, osnovni ravenki od hemiska ramnoteà i kinetika, ravenki za dizajn, toplinski bilansi i korisni prilozi za analiza i dizajn na hemiski reaktori Toplinskiot bilans (106) preku stepenot na konverzija izgleda vaka: dT UaV ( Ta T ) ( H r )( rA ) . (107) dV N F Ao iC P, i CP X i1 Ravenkata (107) se kombinira so ravenkata na molskiot bilans na reaktantot A (54). Toplinski bilans preku sredna vrednost na specifi~nata toplina na smesata: dT dV UaV ( Ta T ) ( H r )( rA ) . (108) C smesa P, smesa Ravenkata (108) se kombinira so ravenkata na molskiot bilans (52) napi{an za reaktantot A: dFA dX ( rA ) FAo . dV dV Toplinski bilansi za adijabatska rabota na PFR: dT dV dT dV dT dV F Ao ( H r N Fi i1 )( r C P, i A ) , (109) ( H r )( rA ) , (110) N iC P, i CP X i1 ( H r )( r C A ) smesa P, smesa . (111) Ravenkite (109), (110) i (111) se re{avaat zaedno so soodvetnite ravenki na molski bilansi (52) i (54). Za sredni vrednosti na toplinskite kapaciteti i specifi~nata toplina na smesata se dobivaat ravenkite (95), (96) i (97) – kako za {arèn reaktor! 33
Toplinski bilansi za izotermna rabota na PFR: Kaj ovoj tip reaktori razmenata na toplina pome|u reakcionata smesa i mediumot za zagrevawe/ladewe se slu~uva preku cilindri~nata povr{ina na reaktorot. Mediumot strui vo obvivkata na cevkata reaktor. Koga reaktorot e pove}eceven, mediumot strui vo prostorot pome|u cevkite. Strueweto na mediumot, vo odnos na strueweto na reakcionata smesa, e ili istonaso~no ili protivnaso~no. Ravenkata za dizajn na PFR i toplinskiot bilans na reaktorot se kombiniraat so toplinskiot bilans na mediumot za zagrevawe/ladewe: 1) ravenkata za dizajn na ceven reaktor primeneta na reaktantot A glasi: dFA dX ( rA ) FAo ; (54) dV dV 2) ravenkata na toplinski bilans na reaktorot e: 34 q Ua T T ) [ H ( T )]( r ) ; (112) V ( a r A 3) ravenkata na toplinski bilans na mediumot, ravenkite za vlezna/izlezna temperatura i ravenkata za vkupen toplinski protok se: dTa waC P, a q 0 (113) dV ( H r ) Ta Ta ( V ) T ( rA ) (114) Ua V T ( T 1 T ) exp( V ) (115) Ta a a2 ( a1 R V Q qdV WaC P, a ( Ta, 1 Ta, 2 ) U ATsr. ln T T T T ) exp( V ) (116) (117) Vo ravenkite (106), (107), (108) i (112) aV e specifi~na povr{ina na toplinska razmena (vo odnos na edinica volumen na reaktorot), dodeka Ta,1 i Ta,2, vo ravenkite (115), (116) i (117), se vlezna i izlezna temperatura na mediumot.
Page 1 and 2: HEMISKI REAKTORI 3 Zbirka re{eni za
Page 3 and 4: Skopje, 2010
Page 6 and 7: Predgovor . . . Hemiskiot reaktor e
Page 8 and 9: lot da se stekne so ve{tina da gi k
Page 10: ~ite }e mu ovozmoì preku niv da go
Page 13 and 14: 5. TOPLINSKI BILANSI ..............
Page 15 and 16: XIV êtvrti del IDEALEN CEVEN REAKT
Page 17 and 18: Zada~a 4. Adijabatski PBR so pretho
Page 20 and 21: 1. STEHIOMETRIJA 1.1. Prost reakcio
Page 22 and 23: Prv del. Definicii, koncepti, stehi
Page 24 and 25: 2. TOPLINA NA REAKCIJA I HEMISKA RA
Page 28 and 29: 3. IZRAZI ZA BRZINA NA REAKCIJA 3.1
Page 32: Prv del. Definicii, koncepti, stehi
Page 35 and 36: Molskite koncentracii vklu~eni vo b
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Page 43 and 44: Za presmetka na brojot na reaktorit
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Page 47 and 48: Toplinski bilansi za adijabatska ra
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) Za varijantata na razmena na topl
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( H r )( rA ) V TW , vlez T
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Vkupnata koli~ina toplina {to }e se
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) Za presmetka na vremeto na reakci
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( 1 X ) To C A C Ao ; (1) ( 1 0, 5
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11620 X T To . (6) 38, 73 12, 91X
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96 t r t r C P dP dP C Ao ; 0, 5(
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a) Od kineti~kite podatoci da se op
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100 C C W n C Wo / V Wo W rastvor
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A B ; ( rA) k1C A k2C B ; 7 1 k
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) Vremeto na reakcija za 80% konver
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presmetki za izotermna rabota na re
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Zada~a 1 Hidrogenacija na etilen vo
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Tret del. Proto~en reaktor od rezer
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1 Tret del. Proto~en reaktor od rez
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POLYMATH Results Tret del. Proto~en
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F F X X A1 B1 1 1 Tret del. Proto~e
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C B2 0, 1056 F F X 2 A2 B2 2 Tre
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Zada~a 8 Tret del. Proto~en reaktor
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Explicit equations [1] R = 0 [2] T
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X * XMB XEB X*; XMB; XEB 1 0.8 0.6
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XMB XEB 1 0.8 0.6 0.4 0.2 Zada~a 10
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( C C A1 ( C C A2 ( C C A3 A Tret d
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1 Tret del. Proto~en reaktor od rez
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C C C C Bo Bo Wo Wo Tret del. Proto
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dT dt Tret del. Proto~en reaktor od
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Zada~a 1 Endotermna reakcija vo gas
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êtvrti del. Idealen ceven reaktor
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Re{enie: êtvrti del. Idealen ceven
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POLYMATH Results Calculated values
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A (NO) B (O2) C (NO2) I (N2) êtvrt
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X 0 0, 2 êtvrti del. Idealen ceve
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Explicit equations as entered by th
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Re{enie: a) Izotermna rabota: êtvr
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T (K) k (T) izraz (4) êtvrti del.
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( r êtvrti del. Idealen ceven reak
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0,22 êtvrti del. Idealen ceven rea
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Zada~a 16 êtvrti del. Idealen ceve
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V PFR k F Ao êtvrti del. Idealen c
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Ropt=1,5 Vmin=1884litri êtvrti del
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Petti del Kataliti~ki reaktor so fi
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ili 318 - diferencijalen oblik, kak
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Od izve{tajot i od rezultatite od p
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Grafi~ka prezentacija na site rezul
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Ponatamu podgotvuvame brzinski izra
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Zada~a 3 326 Reakcija vo gasna faza
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Iako brzinskiot izraz e prili~no go
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330 Fio Fi() Fi(X) pi = yiP = (Fi/F
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332 A FAo B Bo Fio Fi() Fi(X) F 2F
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Ako reakcijata se odviva vo pove}ec
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Isto taka, dobro e da znaeme kolku
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Prvo, brzinskiot izraz se pi{uva vo
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340 Yexp X Ycalc 6087E-12 0.105 8.0
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Re{enie: Rabota so razmena na topli
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344 dT dV dT dT dT FT CP 65, 9 6,
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Kako {to moè da se vidi od dobieni
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Komentari: 1) So adijabatska rabota
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za KC(T) se dobiva sledniov izraz:
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352 W (kg) W (kg) (-rA) = f(W) W (k
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354 - toplina na reakcijata: Hr = 1
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356 dT dV ( H r )( r C A ) smes
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358 Potrebniot broj reaktorski cevk
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360 C TS r a, T kT pT Cv K
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364 Za brzinski izraz preku konverz
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366 0, 2 0 h f ( X ) dX 3 0, 2 0
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368 Sega go pi{uvame bilansot na ak
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Re{avawe na ravenkata (8) zna~i pre
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Analizata za razli~ni vrednosti na
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Re{enie: 1) Ravenkata za dizajn na
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[8] Po = (1-X)*P/(2-X) [9] Ph = (1-
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1 ( rO ) f ( W ) ili D f ( X )
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380 f 9, 375 ( 1, 75 0, 0585 ?) 9
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Za da zaklu~ime dali ovoj volumen e
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pritisokot i konverzijata. Zavisnos
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k 3.194E-05 3.194E-05 3.194E-05 3.1
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[esti del Industriski reaktori
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392 - vlez vo reaktorot: T C o 650
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Izleznata konverzija normalno raste
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gramata se vnesuvaat ovie dve raven
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Toplinskiot bilans vo ovoj slu~aj }
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400 X 0.5 0.4 0.3 0.2 0.1 1 2 3 4 5
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402 1060 1032 T(K) X 1004 976 948 9
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Zada~a 2 404 Piroliza na etan do et
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406 C A C Ao ( 1 X ) ; ( 1 0, 6X )
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408 X 1 0.8 0.6 0.4 0.2 0 900 950 1
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T 1053 930.72495 1053 930.72495 FAo
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sokot, potoa podatokot za konstante
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Za vrednosti na Re-brojot pome|u 30
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416 V (m 3 ) P(V) V (m 3 ) X(T) T (
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eaktorot: dali toa }e bide izotermn
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2) Da se povtori re{enieto pod 1),
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e{avawe na zada~ata da se koristi p
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ni ravenki, (5), (6) i (7), zavisno
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Ramnoteà: Za da se kompletira slik
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Explicit equations [1] Feo = 0.0034
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432 T (K) Presek na ramnote`na i ad
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cionen mehanizam koj, pokraj glavna
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436 - vodorod, H: - benzen, B: - et
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Za da se re{i sistemot od 7+1 difer
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440 FE(V) Promena na molskite proto
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442 F F F F F F F E FEo 1) 1 ( 1
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enzen izvedena pod dadenite uslovi
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- toplinski kapaciteti na reaktanto
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dX (rA ) . (3) dW FAo Ravenkata (3
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FAo 20 20 20 20 T 527.23 527.23 812
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2) Novata varijanta na adijabatskat
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454 C P, A F C i H r C P, i P, B
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Zna~i, so ovaa varijanta razreduvaw
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segment }e treba da se presmetuva p
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dodeka izrazite za molskite koncent
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Toi 650.66442 650.66442 650.66442 6
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Sedmiot segment: POLYMATH Results C
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470 X 0.4 0.32 0.24 0.16 0.08 0 500
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Zada~a 5 472 Proizvodstvo na glukon
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30 24 / 144 5 . Zna~i, na po~etok
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T a b e l a 1 Po~etok na ciklus 10
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478 Vmax / K m 1 5 3 k 0, 016 h
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te~nata reakciona smesa se odrùva
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482 r r , r , 1 r , 2 r , 3 C
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azot za vkupno sozdadena kiselina (
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486 CB(t) CM(t) t (s) t (s) t (s) A
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Zada~a 7 488 Kataliti~ka oksidacija
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490 dX dW ( rA ) F1 ( X , T ) (2)
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Podolu se izve{taite i grafi~kite p
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K2 13.126279 5.2903007 13.126279 5.
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Reakcioniot plan pretstavuva grafik
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498 Podatoci potrebni za re{avawe n
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nosno ravenka za dizajn (preku konv
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0, 01094 kmol ( rA ) k 0, 425 P ; P
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- proizvod od koeficientot na preno
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506 - Drugite podatoci se: sloj 5
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508 X(W) W (kg) Zavisnost konverzij
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temperatura dava podobar efekt i vo
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Bidej}i reakcijata e egzotermna so
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514 - Kinetika r ( r k r k 1 1 2 2
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516 k k r k k 1 1 1 2 2 2 dF C dV d
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So solverot za diferencijalni raven
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na koncentracijata na kislorodot. T
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522 Varijanta 2. Proces so kislorod
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Ravenka za dizajn na PBR: Ravenkata
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Sistemot diferencijalni ravenki (11
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528 FA(W) FB(W) FC(W) W (kg) FD(W);
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Ravenkite {to treba da se kombinira
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vo 7648.55 7648.55 7648.55 7648.55
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536 r2(W) r1(W) Grafik na zavisnost
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Y = 1 7, 077 ( 1 0, 45) ( 1 0, 4
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540 r2(W) r1(W) W (kg) Grafik na za
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1 ( rA ) 1 r1 k1 p A pB kmol/(kg
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544 Za specifi~nata povr{ina se zam
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na toplina i za protokot na vodata
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Cpa 44.257982 44.257982 65.187219 5
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Na prviot grafik ne e pretstavena z
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552 Da se presmetaat i analiziraat
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FMo 9, 07 3 CMo 0, 169 kmol/m .
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povtorno treba da se re{at ravenkat
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da se odviva taka vleznata temperat
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560 ~ , i iC P 35 12, 518 0, 05
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Vremeto na nestacionarniot period n
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564 C C C Ao Bo Mo F F Ao o Bo
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Kako {to se gleda od dobienite rezu
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Zada~a 11 568 Proizvodstvo na akril
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na izreagiran propilen (AK/P 0,82-
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se dobivaat preku stehiometriskite
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Granicite za re{avawe na ravenkite
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578 T(V) Grafik 2. Promena na tempe
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turata e T 520 K. Vo ovaa presmetk
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smesa moè da se izrazi preku edins
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inerti i amonijak. Koga vtoroto e s
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586 k1 pC 2 R 0 K P ( atm ) ; (
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duvanata reakcija. Ovaa operacija t
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I dvata grafika, 2 i 3, pokaùvaat
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( r A 592 F C F F F F To T T F
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Sledniot ~ekor e da se sostavat mol
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na i specifi~nata povr{ina na topli
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[5] k1 = 1.79*(10^4)*exp(-20800/1.9
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Stepen na konverzija na azot Stepen
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602 1) UaV = 25000 kJ/(m 3 ·h·K)
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LITERATURA 1. Levenspiel, Octave, C
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ISBN 978-608-65044-3-4
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HEMISKI Zbirka re{eni zada~i REAKTORI 3

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