GATE Chemical Engineering 1991

8/21/2019 GATE Chemical Engineering 1991

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w w

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99

I u t

l.

= =

CHEMICAL ENGINEERING

l ,

3

-1.

SECTION A

80 Marks)

Ma.lch the foflowing.

I..I S

L

A Phenol fonnaldehyde

B

N)IO

n

C High purity poly\

iuyJ

chloride

D St)7ene butadiene rubber

Lis

t

n

I Suspens•on

polyrnemation

2.

Btmdsion po lymcrl,.auon

3_

Sol

ution

pol

y

mcrizmion

4. Bulk p o l y m e n 1 t o u

Nlatc;l11he

followi

ng

Last I

A, Me thnnol to gasoline

B edible oil hydrogenahon

C. Meaha1wton

D

Butyl a ~ e l b t e

Ust

ll

I

Ra

ney

mckel

2. Ze< li te

3.

Cation

exchange

resiu

-t Nickel

Fill m the blanks

(2)

(2)

a, Pure terephthalic acad

ts

man

ufac tured

by the oxidation of tl1e oxidation of

: . . . and

as used

as a r

aw

material for the manufacture of

(Z)

b. In the manufacture of' Portland cement

a

e

maJor

mw

ma

terials a r e ~

. and

(2)

Fill

m

th

e blanks

a A wet

p n p ~ r pulp

oon

tams

75

% water.

AOe

r 100

kg of

water

is

removed in a

drye

r i l

is foun

d that

the pulp is

00\1

5

G

co

ntaining

3()%

wat

er.

11le \\eight or

the

original

pulp is

--'

2)

b. The

wea

ther reports

a

dJ

y

bulb

temperarure

of

ambien t

rur as 29°C and

relnti

ve h

unu

dity

of

80% . 1l1e

barome

ter

re

ad

s

7Su mm Hg

.

111e

percentagehumidity of the ambtent mr

is

(Vapour

press

ure

of wnter

at 2iJOC =

3ll Ollll HJl.)

c. l·bS is produced [Tom the reaction

J e <;+2HC/-) l •cCI H,

t2ll kg of FeS

react

w•th 15(1

of

HCI (lnd OSk mol of l:bS has been

produced. The degree of

cornpletion

of

the reaction is and the

limltln_g reac

tant

is

and the limi

ting reaclllllt

is

(2)

d.

.Tfhe heat absorbed For isoU1ennnJ

reaction

J

l w(l )-> C1l:.,tg) +C1-I•U J

at 29: K and I

ntm

pressure Is

Standard heat of

oombostio n.IJ/mol

C1

Hau(g)

C

.l

NJ(i:) =

-14J

1,

\1

Clll. (g)=

-1561.0.

121

Fi

li

on lhe blanks

a. Spherical p l l t ~ c l e s or limestone

(d,

=

0.Iii mm, densi

t) =

281X) k g i m

tnkc

S minu tes to

sc

ule under gravuy

through a

o

m co

lumn

or

a

fluid

of

120(1kg/nf Thll' drag

coeffic1ent is equal

to

2)

b. The equilibrium position of the lloat

In

n

ro tameter is detemlined by Ue

balance

of

three fo rces These are

~ and

(2)

Mnach

the

tollowing:

(2)



w w

w . e x a

m r a c e

. c o m.

8,

9.

List

I

A.

f.

dihle oil.

B.

t 'n

uleoil from oil \ V e i l ~

C 98 "'• Sulphuric acid

D

.f, iqn i<l•

co

nw

lning

p a n • i o n s of

;tbnasive o l i d

[.

osl

II

I. Oiap hr

ogm

pliii\P

2 Centrifug;.l pump

3.

Ge:Jr

purnp

-1..

Air till pump

For SO() < Re

20 1000

, "

'

friction factor

f 0.046 J ' ~ l Find

U1

c

co

.lbuno

>

ctur.

Ju,

atRe

LOOOO

.

l2)

rill in

th

e h l n n k .

:.,

The

s

ph

llritity of o non·s

ph

oricol

pori ide is defined Ihe rntio

of

to

......-,---,:-::---=- 10

• n te

$phorlcit) of a .:yllndri"" l portlcl" of

di•meler 3 mm ond langlh 3 rnm i•

____

mm

.

m

h. The·

ma

:ti

mum

diameter o'f ft sph.:r

i

chl

sand p a l l i c l ~ > (dcnoily 2GSO kg/m)) tlorot

will ~ Q I I I c in tbc ;fol<->. haw rogion in

\Voter (clen.•ity 1000 k:glmJ , \isc.,its

l ~ l l k,glm,s)

is

nun

21

c.

A

vacuum

leal' filler gives a

loL1I

volume of Ou1

1

of li.llr3tiS in 30

minull:s .lf tbc rll listancc

of

ilwr l o t h

i• negligJble.

th

e

ti

me Ioken fo r ~

CSJ IIo::tion nf 20

hl

< of fillrate

is

otiftutcs ~ n d f o r t h ~

<o

llc.:tion

-,f tO; -m

1

of tlllrotc arc

m i n u t

2)

d,

i·tJr •

tw

o fo ld increase

In

pre>'Sure

he

~ p e c i f k re <istsnce uf a Iiller cake

i a l ~

by .

if

ac

contp

reoas

ihilil)•

oodt:icicnt

0.5 ttnd

incrc.'l' e>: by , if

th

e

1 1 m p ~ s coetlieient iR ns.

(2)

f.i

ll

in lbe

blonks

:t. An industrial is

of

20

l'tn

obiok

ilroo

llly (

k "' I W/

111

,

• C).

T h i ~

~ o v e r e d on

th

e outer u r f l

11i1h

u 3

: o n

lnyc:r

of insulnting moli:tial

(k - 0.075 Wl rn ."<;'). 1J1e inn<'flltOS I

10.

II

.

12.

1uf1

•urfncc

it

940"C

ond the

u t e r m o

AI

400(' The

<

Uady ro

le ol

neat

~ - a n ~ ( < : r

thru

u £h lhe wall _

W'uo · nod

lho

1¢mper'olurc

ul'

me

inl

o;rf•o:e lt

etween

oh

t;

fin:cla}

nnd

ohe

ln•ulnllng

m:neri• l •c

.

t2J

b. l'he Bio i

modulus

l

or

•

3 em diamet

er

sphere (k

fo1r

ll•e Sjlhere 5W

.m "C

) at

00°C s ubjeclod to b conve-ctive a ir

flow

fe )Ulting i l an

-uve

m

ge i nVecti\Tt

he:tt IJansfer ~ o e m c i e o t from lhe.

suruce

of

30Wfm

2

• •c Is equal to

2J

Choose ille comet rutswer:

The widely used Di llus • Boelter O< jU>Iipn

i•

\OI

Iid

provided

•· 2

100

..

R.: <

I0,

10(1 • n ~

the

pr

op<:

rt

i""

Of the lluid 3n GV3f\lJl(tl\l the3I'Of3SG

film t

cmpc

r·atw·e.

b.

Re

2 1

00

•nd tlu:

JllOitertic-s

of the

lluid ore 31 lhe bulk

temi)C '3

1ur

c.

c. 10.000 <. Re

<

1

20.0\10 and th

e

fluid

pmp<rlies an: ev.1 lualcd nl

tl

tc btdk

tumpornluro.

d. None <1ftho nb

ovc

.

M• lcltlhb JoU

owmg

List

[ Pro

cess)

A.

Drop

wi:scoondetlStltion f ~ t e u m

B, Bo iling wulot

C.

Healing oils

D. Heating with Air

2)

Li

• l I (

UIOllllr:msf...r

Coclfidonl W/m

1

,"C)

L 1700 -

50

,000

2.

j ( ) 1500

3. 1

5

4

30.001)

- I

00,000

2)

F

ill

in

illc

blonlaa,

II . 11u:: f f u ~ i u

r

Ue O 1

111fT1

HniO f IO

ill

ll}

' ~ ' ' l i n n soh

u

inn

10

t i t ~ pltasl ' to;

IO" Kmol m

1

.s. The lo

terfa""

o:quilibrium p o - . : u r c of Nih

is

66

Nlml and lbe CQJlCCTllrnttOO

or

Nfl:t

in

gas ph

ose

IS

5%.

If the totn.

l pressure Is

101 N•m

1

• tcmpern

ltl

rc

os

295 K and

diffu5i\'ily of NH t is 0.24 cm

1

is.

tl1c

grn

tilm i h i c k n e ~

i•

mm .



w w

w . e x a

m r a c e

. c o m

13.

(2)

b. The Fick's second law .:>f diffusion in

o n ~

dimension

is_____

(2)

Clwose the c.;>rrect.answcr:

l.

For

a gru;

obeying

the

van

de r Wapls·

equation, at1lte critical

tem,peratut:e

a

bodt

p

) rutd (

8

))

are zero

av r r

b. the first

derivative

is zero,

while-the

second

-

cferivlltfve is non-zem

e.

U.e se.;ond, d

eri

vati ve s zero; wltile

tlo.e

first derivative is

nt:lll·zero

d. b

ot

h

tb.e

derivatives

are

non-2ero.

(2)

2. For an. ideal

gas

th

e

slope of

tl

te

pressure-

vo lum

e

Ollfl'<' at

a given point

wi

ll

be

a.

t e e p

or an

is

othe1111ai

clmn

for

an

adiabatic r o c ~ s

'b. steeper for an adiab.atic than for art

lS..1

IhermaJ

pr

ocess.

.:,

jdmtiicalfor bo tlt dte processes

11. llfOJ.)posite signs

(2)

3. fo

r a

system in

eq

trili

btitun, .

nL

a

given

l

emt

ternl

nre and.pressure;

:1. the entropy nttll<tlte anlilillrttmt

b. I

he

enthalpy must

be

a

minlmllm

c.. the intertuil energy must e a m.itlimmn

d. tl1e Gibbs-.free

energy mu rt be a

m.inimum .

0

1. fo obtairt the integrated form of

Cl

auSius-Clapeyrott

cquatiOll

tr.f .l.=

t

[.. .._J_J

p

1

R

.T T

1

'fro

m

tlte

exact Clapeyron

eg)Jll

licn

lt

Is llSSunted that:

;1, IJ

te

VoC'hune

of

th11 ~ q u i d pflase

iH

nep,l:ig.tble

.:ompured lo thal

Qf the

V Bpour phase

b. the vapour pltase behaves as an Jdea

£ti

c. l;he heat

of

vaporizanon is inctepende

nt

of1cmperature

d. all lhe. above are applieable.

(2)

I

f

3of7

5.

n e " l ' e of T·S

diagram

tN Cnm

ot

~ . · y c l e

is

a a re<:tau

gl

e

b.

a

rhombus

c. a

trape.zoid

d. circle.

(2)

Cltoo;;;> the righlrumver;

I

i

t

te

reaction of A and B prodUces

lhe

desired

produd

R

as

well

as

the

LlnW>ml.ed

product S Wltat level of

rea

ctant concentrnti.o

ns

alig)1

meditDil,

Jo,.-) should

we

use for

the

follow ing

.reaction scheme in order ilJ

ma

ximize

the

conversion ofA

to

R

Reactii)Jt

Sclteme:

A B-tR

= k P C ~

A

- tS

r

1

; kpA.

a. LowC,i. Low

b. Highc

a,

Any

c· ffighCA.

Low

C£

d.

Hlgb

CA AnyCe

(2)

2. Qua

l.ilati

vely,

find

the o p ~ m ' ? f l l

temperature progression to

mlllWrllze

C'I;

fur tlte lllementazy reaction schem e

gi

VCJl o ~

A . . t . R ~ S . . i . . T

\.:t ~ ~

~ u

v

Ji

1

=25;

E

= : 5 ; E . = 3 ~ ;

E1

=

40;

f l t;-

25:

(E;

Actlvutiou enew

a DecreaslJlg T

b IncreasingT

c Decrl'8Sing T fir

st

.

and

lhen increasing

T

d. Cons1ru1

t T.

(2)

3. Your company has

tw

o mixed flow

teact.ors of wtequi l 11i.ze for o o U L ~ T I J .

a specified product

fo

nned by a

h o l l 1 t

~ n ~ seCQlld order

~ t i c m .

How

should these react

t>rs

be

co

ru1ected to ach

ieve a

ma.umlUll

productioJtrate1

a.



w w

w . e x a

m r a c e

. c o m

15.

:

d.

--

(

2)

Fill

iJitbe

blonk.:

r ur U•7.Cf 0 Qrdcr

so

lid camJyz

cd

[C11CUQO 8

havmg a Ttnele

Mfldulu

s equol to on

e.

be

v

ol ue

ofeffectiveness l'ncto'r is

2)

1(\ ,

h o o s e t b

e r i ~ J n - a n ; , w t r

I. A certain thermoco

upl

e o specific

ri

me

co nstant. o

ls

.

It th

e

pswess

tempcrnmrc h n u g e ~

obru[lll

y from 800

t

C) 900cC, tho tcmpemluro rC Jdin

g

in

ao indicat

()

r ol

toched

to

tho

thermOC•Iuplo ofter

s

will

bo

approximately.

11.

~ < S o c

b. \100 c;

c. 89fi''C

d.

195' c

2)

2. A plant has n water tnnk mounted on

the top t>fu 1.7 m pial f o m 1 l i l l l k

10 m high. T

he

height

l l

f wutor

i l

l

tho

tank.

i

p

ressun>

gouge

un the

.

0110t

u height

111'

5 m

fmm

tho

~ n l u n d reod

;

1.7 bllT

a, l•ull

b. 5.12m

3 l2

m

d. 718n

t.

3. A

•)'S

tem

bus

Ute tnutsicr functiou

I 10

.r - +1.6.•+·1·

(2)

17.

j

ur 7

A s tep change ol'

.J

umts mugniludc

ts

r u d u ~ . : d

in this - y s t

c m J'ho

per "cn t

M<miiH>OltS

2

b.

30

c. 2.5

d. 35.

(

2)

4

The type i>f c < ~ . > ~ that mw;t nlton oan

b;:nctit fro m derivati

ve

control ••

a.

Flo"

h.

Lc•

•d

c. T.:m l"r:nure

d. Pro

ss

u <l.

Fill

co

thebl:mks:

(2)

a. Narrow

fnced flMg

e is the

)

no wbere

ull

the

lit

ce

oQ

ntn

ct

urea

li

es

Lh

c ctrclc cnclas<....t bv the

oo

ll holes.

(I)

b . JJt culculution

uf

flange .tress, Lite

loa& uctlug t) ll

th

o OnJtgc: W'<l In

be

. : . u < l < l bdth lo r opornting u.< wd l :c;

lo r bdhiJtg up condition> und

____ l' the two \\1ll b e . t r t ~ e - n .

)

c. Tite tigldit} of tlte cylindrical l

~ o c : L o d ' exkmnl pressure mu

y

he

im

:

reus.:d

by provid ing uoilonnly

J"'ced..

m u l

•> m

uin:um(\l

nmtiuJ - - - - - - -

I

d. p u n s join ts nr.> prov ided in fi

xiXI

f\lhc

hem ~ e h a u g . : r . ~ m reduce

- - - - -

' thes

hdl

und ltibolo.

I

J

Chuose

Lh

ecorroct : swe r:

I.

.A

stnndard type ofheat e. <changer

wi lh

o l i g i h l c

Sor:lr

va

iU<·

C ( ) ~ L ~ Rs.

0 . 0 0 0

ond w ~ l hove

n useful

til

e

of fi

years. Assuming no

l ' ~ t i v

Ct)

nl

pQUIId

inwn:st

Of

I

)

0

t

per yoo

r.

ll 1e cu pitnlized cost nf o heat

will be

a

Rs. M8

b. Rs. 90.

M80

"· R

$. 91

,

180

d.

Rs

,

81 NRO

.

2)



w w

w . e x a

m r a c e

. c o m

19.

20.

2. i lu

v

in

s

~ a l v a g ~ v o

l u e ofRs.

10.000 i•

estimated to have a. service

life or 10 e n r . ; The

~ n n l l l l l

intcrt;st

tJI<: i•

JO•;,

, Titu Original

et)8l

u lite

rencl<n'

"'

•s Rs. 8().

1l lO

.

' l ' h ~

l> >ttl>

value nf the n:no:lor 311et·) .1

ea111

using

~ i n k i n g fut•tl dcpn:ci•llon 1 1 1 c ~ L o d will

be :

••

•

Rs

. 40,096

b. Rs .. 3.196

\1 Rs. )3.196

d. Rs. 60,1%

(2)

3. Tile

1o1llil

.:-api1AI investmcnl for

.l

chemical piAn

is R. .

1.(1()0.000 •nd

th

e

Wlfl·king

_....piL1l iN

1()(1

,()1)(),

II'

•

turncwcr taliu

i t ~

t the

0 ~ t t :U ual

MD 1:11 will he:

••

Rs

.

800

.000

b.

Rs

. 900,

000

c Rs . LOO il,

OOI)

d. Rs

.

1, 100.000

8ECTION II

120

(2)

\\' rile d ~ l ' ' l l tlte

mtlin

Qvmll rcaeti

un

C:ljllillilm

for

th.: lliOtlulocturc u

1\JIJI

)w

c hemica

ls

(I>

2 - 12)

Soda

ash

2. SupcrphO IIIhllfc frnm phosph:ate tl)ck

3. Ll rca

4. High octone petrol from naphtha

5. \'iny1 ICCI:ilc fi'I>Oi

et1

1

y1e

ne

6. Actylonitrile from propylane.

Nitrogen from a

cy linder

is hobbled

thmugh

•celone nl 1. 1

bnr nnJ

323 K nl

llle r•Lc

or

2 W"' m

3

llllin. The

nitrogen. saturated with

acctanl

v

aJKlur

,

lea

ves

or

l.ol;; bar. 308K :u

Ihe

n ~ l c

111' 3.83 • 1()..

mJ'

mln

,

Whn

l

l h ~ vapour pn:5llurc of acetone nl

308K7

(6)

l . LlmoR tone

mi.wd

with aokc

i•

bei n><

huml in o kiln. An avernge r n n l y ~ i s of

l h ~ llmeslunc i; C C O J : 8 4 . ~

l\lgCO,d I.Sqo lind tho r<> l inu• The

21.

22.

3JJf1

llOke c o r t t ~ i n •

76oo

~ a r b o n .

21

°>•

11Sh

an<

L moisture.

1'1te calcin:utons of

C

AC0

1

i only

S ~ o complete and

Utal

Of

:>1gt0j 9 0 ~ u . TitO earl>()U in the

coke is

co

mplclel) bilml

10 rol. ,,,.

kiln

i

tl:d with I ot' eokc 11tr

5

kg

limestone.

Calcui• Je wl:igltl per

ccnl

c ~ o in th

e product

leo\•ing t h

e

kiln.

(6)

I. \Vhol ;i

ze

of orilice wo

uld

give •

p r e t o ~ u r c difference of 41 em \\ntc.

C)Iumn lor the low r li11uid styrene

of

spet itie

grnvity

0.9

ol

0.055

m

_ in

a lSI mm diameter p i p e ~ ~ ~

u m D

= (\.62

.

141

2.

.:\

aylindrh:al tank S m cliamel< r

di•Qharges tluougb a

pipe

5(l m

Ions

and 2.i0 DllD

diumet

er c ~ L c d to the

ba,•e

of Ut

e ttnk. Show lh•l

t.h

<: tim"

1<1ken for water level in lhe tank IQ

~ m p

from

4

m

to

I .m nbove bott

om

or u

..Lank

i•

givon

bj

t :

/0.3

H ~ l H *

when

it is

nssumed tha i (Ripu

1

)

the.

Miltanc.'l tl.t flow por unit are.t uf

pipe

surface. is constan

t

(H)

( I )

'2. The power required to ~ J U S b

100

tonS>'ltr

of

a material kW.

if

S O ~ . or the feed pas.es O U ~ I 51

trun SCJ'C<.11 and 8 0 ~ of Ute product

pMiseli through a 3.2 nun s.:reen.

Wh•

•

i<

the \\otk imkx. of he mJterfnl'l

( ~ )

3.

Whal

,viii

he

the

ll')W<T

n:

qu

ired

f11r

'lhc :<lun e te.xl ttl 1(10 l u n . ~ n lo be

.:ru •h

cd 10

4 product SUCII u.n

so•.

i.

I

<)

pnl;li

tluough

''

)

6 11U11

•or•>en'/

(2)

11, In • mi:ortur<) of qunrb;

(sp.

gr

=

2.65)

and t ~ l e (•ll· gr. = 75), fhe size of

.bc p>rtiek' > I"Jngc from 0.0002 em 10

0.0()1 CQl. Ou scpcrrat

jon

in • hydraulic

c l;lflsifier usins wnter under free

t l l i n ~ t "onditions. wh:1t IS tl1e



w w

w . e x a

m r a c e

. c o m

23

4

mtt'illu

unt

of

qunrtl lllld 1 1 ~

miUiiUUlll

~ Of

gaJen11

i

ll

l

l\"

pure

produets?

V i s c u

nr ,,alcr - 0.00 1 kw

rn

.s.,

d c u ~ i - 1000 kg /

1n

1

)

61

I.

111

tL

cocum:nt J•cut

c x c b t i J t g ~ r

tJn

ll

il

•lroml l

;,

c<olcd fn1m 450K 10 41OK

hy

w u t ~ r inlet

~ J i d

tlllllel tonrpeniiU.rc;

" '

300K ond 350K

respecti

ve ) The

L

l(ll

httngcr c i • n s i u nun

•bcr r

.,r

I m leng lh ohch.

It

is

111m

desi

red

In

cool

the

o

il

to 390 F: 1

n s t c ~ d

of-llO

K)

1vhifc

nwintnining

the Onw

nne

Qf oil.

fl

ow-rate ••I" wnter. Inlet temperatures

of oil

anJ

wulo;lf. ~ n d the number <lf

lubes at

tb<>

saJJtc l'>lucs

as

before,

C ~ l . : u l n

tbe lenglh

ll

f o acb tube

requ

..

,<J

for

th

is

pllrpo

se u m e

lhul

U1

e physical ptopei' Jes remu

iu

uudumged.

(6)

2. A

l;

llri?.Oil\111

s1

cum pipe 20 m tong, SO

mm internal dinmcl

er

,

1 ) mm

onlside

dinmotor

loM:S I3.5 kW heal In tht

u m > u n d i n

3

11))< 'r

he

IMrli Cltric.•

slenu; 11 :iOO

K.

thai t h ~

c o u v ~ t i lu:·J t tr.msrcr cucllicit:ut

h, -

1.65 ((I

1

)

0

:> W m' .K nn

d

tho

S r a n - B o ~ m o n n

eonstnnt

~

5J

•7

10 W'm .K. Find lhe

e m • ~

y of

Th

e bare wrfuco t•f The p1pc

16)

I A coolinuous

slfcnm

of n binmy liquid

tni

X1uro

, conlllininp

x.-

mol

f r ; ~ c

of

A.

os

fed

iniQn Dash distillanon un il

f-oo

d ;s

rcprcscotc<l by

pomJ

Q

on

ll1o

cothnlpy

-conceulroU

on

diagram

as

shill\

11

ill r igu.re. The products

IJ

UI of

U1e unit are a

vapour stream

(yv Ill

traction

or·

A1

nnd

liquid

stream (XL

mo l

rracT<un

ofA).

u uf 7

~ r l

I

I ....

:

I

a

I

I

I I

I

...... X,. f., . .

..

. .

h-•cJIOfl

II

-

Obwiu an expression for

1he

mtio of

ttpour now r

ate

to 'L'l d low

rtl

l ( 1

terms of compru.-ilions

(2)

b. Show IUul he hcnt uddcd per 111<1le of

teed

is given

by

tho

dis

tan

ce

1 Q

(See

Fig

(6l

2.

An n q n c o u ~

solution s i n i n ~ I.SK

mole :X,m

1

is led ul 36 mils to tho lop

uf

pacl::cJ column of heigh l.t>Om :utd

cross sec1ionul :li'Cti of (10tl45 m' and i1

l

ea

v

os at t b ~ bo llUJU with

1.

4K

mol

c:irn

1

• An

(l

t l\ l l l l ic solvonl

B.

c<mlltining 0.008 K nJol

Xl

m

1

l l a 1 1

<t)U1110r lo I he Q u t o U ~ phU;;Il

111

9 rtt[/s.

'fhe equi librium

relationship is

;_

• O J C x ~ . , . .

nctcrmine·

:t.

The IQg melll15

co

ncentmtion

ditlbrencc for

I I n n ~ r

12 1

b overall vnlumctric

Trnnsfer

c

oe

l'ficicnt.,

bn

sed 1111 orgauic phnsc

(ill

c. 'rlw heig ht ul lrun;.iln Hm l .

(2)

I. Cnlou

late

the troclJC>n

ol

p11re clh<ill¢

tbat wou ld deh ydrogenate at 750 K unJ

5 ntm

.•

if

he following

r e t ~ c t i < m

g<><:S to

L'Quihbnum

.

C,Ff, (g)

,...

C H g )+N. g)

AG lor the rcacll

O

JI at 750 K

=

12.57(1

Jd , 1\

ssUmc tdcu)

b e h a

16)



w w

w . e x a

m r a c e

. c o mtj_

l . At 3 1S K

nltotal

rres<ure

of24 4 kl'•.

the oompoo;ititln Of NYSl<; n ethAnol

( I }

;md

l<

lht

tnc (2.)

at

C< tuilibriuon is x

1

=

0.3 and

Yt

0.634.

'T

he

Kal

uroti

t>

n

pn:ssuru

ul

the @ci,

•eu

tentll< I"Rture for

puro tJOUlp<lflontJI nre

Pt = Z3.()(; kPAand P, ~ 11).05 kl'a.

respect"vely.

Calculntc:

"II,

The

liquod phttse

lll)tivil)'

O<.te1'ficienll

b. the

vo

llw of 0

6

/RT for the

1ic1uid

phll le

.

I. For u"''"lliible

h c n ' n i . : .:lem.:nt:ff}

cnwl}tio

n:action bf thc;

type

••

• ·

fwd

th

e Optimum

opernling roactimc

lompernture 11 conversion level -" - -

o.s

DATA.

Maxi

mum

300 K.

lq c"]l(IO - 5000/f)

k

1

o:tp(40 - 15

00t'11T)

allowable temperature

(6)

. be rnte af • liquid phnse reaction or

tl te type

• 1 B Producl i

i•

found

L

I

be independent

6[

c'Oncentrolton ofA ond

D.

ood cqunl to

I K 1nol

(tn

j) (UliU)

ut

300 .K Find lite

in n mi' c

. d

ll \\1 [c

uc

t

O r

hnving

vol

um

e e<t

u•l to

m

1

with

1 < e

d

ooncentrotion of

A and S equal lo 5J.:.

mollm

1

•

fuad ·flow

rote

e q t u ~ l tC1

I

m

3

1min..

tmd n:aci<Jr kmper:aturc ectu.11

to 3()0 K.

1r the net vn t"cm energy of' the reootion

as given o . ~ 83 . 1 kJ/mol

fi

nd

tbcvolume

of on t b e n n n J plvg

no•v

'll&ctor for

the

s m ~

co n

ve

rsion

lmd feed

oondirions

" '

in the case of the ai

mu

mentioned

rcoct()r

but with

rcuOtOc

tempcratun;

kcJ>l ot,320 K.

27.

7 oJ'7

(OJ

1. Jind the uuuhuum value

of J.:

•ucb

llwl n

olmod loop system hnving lhe

r()llowfng cbnmolc d, ho equnlion

;,

stnble:

i + +( K +I).<+ .I

-o

(6)

2. An

aqucoUJ soluli11n (donsit)' I )(10

kg>m

• spcalr C

hcut 4

Ull<,g

C)

ut300

K is contiuuou$ly fed ul Q

Oow rot< of

l

mj min to n

continuou

now

s tirred

tank o

volu

me mJ

contoinin_g

o

heater having • heating onpacity of

I )ll l k\V. If the liquid in the tllnk is

Hl•o at 300 K to s ton with. find the

equnlfQn

"nicb pNdlats the e«it

tempernture of

O t ~

solution us a

fune{i

on

or

Lime

f

tfla-

'

heater

iJ

~ \ \ i

t c h e d on.

(I))

L A •phcncnl slornge lllnk

. .

bavmg an

m

at

er diomct.er

of Z

m. lind n

h i o k n ~

qf i

mm . The

lfmk

n u nre wdded

und having joint aOioienoy

of

O.SS.

f'h

e mnl:erial of

con$ltltotlon

will

he

plain carll<ln 81eel. TI1e uhemicn l w

UI

be

n : d ultJu:: ma. ::

imum

~ · m p e r a t U I >

or

96

K. No l'(>ITC\ Iioo pa'Oblems ore

Oltp< \lted. What

rna.ximuw intcmal

p r ~ s s w

l l t t l

lank will" itll tlllldsafely?

Allowable desil n e s ~ at

-

.

orkins tcmp10ratu 'C' li8 .MN1m·.

(

4

2.

A heal

e:<c

hanger

with

nn initial

investment oF Rs

i(lQ.

OilO

has

11 G

yc,ars life. liow much be

f ]lelll

on

"""

improved which

hu

s u life

of

12 ) curs nnd expected

to

sa1e Ps.

10.000 per yc lr'l

AJutun\ compovnd i

ntON

st

r o t e . .

(6)

Documents

GATE Chemical Engineering 1991