GATE Chemical Engineering 1991
Transcript of GATE Chemical Engineering 1991
8/21/2019 GATE Chemical Engineering 1991
http://slidepdf.com/reader/full/gate-chemical-engineering-1991 1/7
w w
w . e x a
m r a c e
. c o m
IG;\
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)
8/21/2019 GATE Chemical Engineering 1991
http://slidepdf.com/reader/full/gate-chemical-engineering-1991 2/7
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 .
8/21/2019 GATE Chemical Engineering 1991
http://slidepdf.com/reader/full/gate-chemical-engineering-1991 3/7
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.
8/21/2019 GATE Chemical Engineering 1991
http://slidepdf.com/reader/full/gate-chemical-engineering-1991 4/7
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)
8/21/2019 GATE Chemical Engineering 1991
http://slidepdf.com/reader/full/gate-chemical-engineering-1991 5/7
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
8/21/2019 GATE Chemical Engineering 1991
http://slidepdf.com/reader/full/gate-chemical-engineering-1991 6/7
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)
8/21/2019 GATE Chemical Engineering 1991
http://slidepdf.com/reader/full/gate-chemical-engineering-1991 7/7
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)