56
Nilai Anda
Nama
AZAS TEKNIK KIMIA I TOPIK : NERACA MASSA SINGLE UNIT TANPA REAKSI
PROBLEM 1. SUB-SCORE 100 ()nded kilogams kilogams *e *e ho) of an an e!hanol/me!hanol e!hanol/me!hanol s!eam s!eam is !o !o "e se*aa! se*aa!ed ed in a dis+lla+on dis+lla+on ,ol)m and !he dis+lla!e is made )* of 0% me!hanol. igh! *e,en! of !he me!hanol is !o "e e,o&eed as "o#oms *od),!. Soluton :
Basis :
mass of feed = %e,o&e %e,o&e of (3( =
Componen
100
kg/h
80%
!EE" m#$$ %&#'.
"ISTILLATE m#$$
m#$$ %&#'.
BOTTOM
m#$$
m#$$ %&#'.
m#$$
2(5(
0.4
40
0.1 5.333333 0.7428571 34.66667
(3(
0.6 1
60 100
0. 48 0.257142 12 1 53 53.33333 1 46.66667
To#l
%me!han
PROBLEM ). SUB-SCORE *0 -$o -$ o h)nded kilogams kilogams of $e! lea!he is !o "e "e died " hea+ng. -he $e! $e! lea!he en!es en!es !he die $i! emo&ed. e!emine !he mass fa,+on of !he mois!)e ,on!en! of !he died lea!he Soluton :
Basis :
Componen
'ea!he $a!e To#l
mass of $e! lea!he =
200
% $a!e emo&al =
0%
(e le#+e& m#$$ %&#'. m#$$
0.4 0.6 1
kg
(#e& &emo,e m#$$ %&#'. m#$$
80 120 200
&e le#+e& m#$$ %&#'. m#$$
108 1
12 1
PROBLEM /. SUB-SCORE 100 A feed s!eam s!eam !o !o a dis+lla+on dis+lla+on ,ol)mn ,ol)mn o$ing a! a a! a!e e of 1200 kg/h ,on!ains ,on!ains a gas gas mi!)e of e!han me!hanol. me!h anol. -he dis+lla dis+lla!e !e ,onsis ,onsis!s !s of 0% 0% of !he !he me!hanol me!hanol and and 60% of !he e!han e!hanol ol ,on!ai ,on!ained ned in !he !he fe ends )* in !he "o#om of !he ,ol)mn. al,)la!e "o#om s!eam mass o$ a!e. Soluton :
Basis :
Componen
(3(
mass of feed = !EE" m#$$ %&#'.
1200
kg/h
"ISTILLATE m#$$
m#$$ %&#'.
BOTTOM
m#$$
m#$$ %&#'.
m#$$
0.2
240 0.313043
216
0.037037
24
2(5(
0.4666666667
560 0.608657
336
0.34567
224
3(7(
0.3333333333 1
0 552
0.617284 1
400 648
To#l
400 1200
0 1
PROBLEM . SUB-SCORE )1 A 100 kg/h e!hanol9$a!e s!eam is !o "e se*aa!ed in a dis+lla+on ,ol)mn. -he feed s!eam ,on!ain 80% e!hanol and !he "alan,e is $a!e. igh! *e,en! of !he e!hanol in !he feed s!eam is !o "e e,o& in !he "o#om s!eam. Soluton :
Basis :
Componen
mass of feed =
100
% e,o&e of e!hanol =
80%
!EE" m#$$ %&#'.
2(5(
0.6
(2
0.4 1
To#l
kg/h
"ISTILLATE m#$$
m#$$ %&#'.
m#$$
BOTTOM m#$$ %&#'.
m#$$
mass f
PROBLEM . SUB-SCORE 0 A kg/h s!eam of a)eo)s hdo,hloi, a,id !ha! is 57.3 $!% (l is mied $i!h *)e $a!e in a s+e ha! a+o of $a!e !o ,on,en!a!ed a,id sho)ld "e )sed; Soluton :
Basis :
Componen
(l (2 To#l
mass of a)eo)s (l= CONCENTRATE" m#$$ %&#'.
m#$$
)ni!
PURE 2ATER m#$$ %&#'.
m#$$
PRO"UCT m#$$ %&#'.
m#$$
N<
n. -he feed ,onsis!s of 40% e!hanol is+lla!e. e!emine !he *e,en! me!hanol in !he
An$(e& :
ol in "o#om = 25.71%
60% mois!)e and 0% of !he $a!e is
An$(e& :
mass fa,+on of mois!)e ,on!en! =
ol me!hanol and *o*anol. -he feed ,on!ains 20% d. All of !he 400 kg/h of *o*anol fed !o !he *o,ess
An$(e& :
"o#om s!eam o$ a!e=
648
kg/h
s 60 $!% e!hanol and 40% $a!e. -he dis+lla!e ,on!ains eed as dis+lla!e. e!emine !he ,om*osi+on of e!hanol
An$(e& :
a,! of e!hanol in "o#om=
d &essel !o *od),e a s!eam of 16.5% a,id.
An$(e& :
a+o of $a!e !o ,on,en!a!ed a,id =
