[반응공학 - 갓성구] 2024 기말고사 1번
Q1)
The liquid - phase reaction (A ㅡ>B) follows an elementary rate law is carried out in a CSTR with a volume of V isothermally. The initial concentration of A is 2.4mol/dm^3. and the exit concentration of A at the reactor is 0.8mol/dm^3. if the same reaction is carried out in two CSTRs with half the volume (0.5V) in series, determine the concentration of A at th outlet of the second reactor.
Q1)
액상 반응 A→B는 elementary 반응 속도식을 따르며, 등온 조건에서 CSTR에서 수행된다. 반응기 부피는 V이고, A의 초기 농도는 2.4 mol/dm^3 이고 , 반응기 출구에서의 A 농도는 0.8 mol/dm^3 이다. 이 반응을 부피가 0.5V인 두 개의 CSTR을 직렬로 연결하여 수행한다면, 두 번째 반응기 출구에서의 A 농도는 얼마인가?
풀이팁)
(1) elementary 반응식이므로 속도식
: rA=−kCA
(2) CSTR 물질수지식 (Steady-state, 등온, 유입/유출 속도 일정):
(3) 단일 CSTR에서의 반응기 조건으로부터 반응속도상수 k
C_A0 = 2.4, C_A = 0.8
체류시간 = V/v0 .
결론적으로 'k = 2 / r '
(4) 이제 답 도출 가능.
두개의 CSTR이 직렬로 연결되었고, 각 반응기의 체류 시간은 r/2 이므로.
첫번째 반응기, 두번째 반응기 대입하면 C2가 나올꺼같아요
2024 반응공학 기말고사 2번 : https://konkuk-chemical-engineering.tistory.com/14
[반응공학 - 갓성구] 2024 기말고사 2번
Q2) The elementary gas-phase reaction ( A →B + 2C) is carried out isothermally at 400K in a flow reactor with no pressure drop. The specific reaction rate constant at 50°C is 10^−4 min^−1 and the activation energy is 85 kJ/mol.Pure A enters the reac
konkuk-chemical-engineering.tistory.com
2024 반응공학 기말고사 3번 : https://konkuk-chemical-engineering.tistory.com/17
[반응공학 - 갓성구] 2024 기말고사 3번
3. The irreversible isomerization ( A →B) was carried out in a constant-volume batch reactor and the following concentration-time data were obtained. Determine the reaction order a and the rate constant k in appropriate unit by integral method.
konkuk-chemical-engineering.tistory.com
2024 반응공학 기말고사 4번 : https://konkuk-chemical-engineering.tistory.com/18
[반응공학 - 갓성구] 2024 기말고사 4번
4. Consider the following system of gas-phase reactions:D is the desired product, and X,Y and Z are undesired products. Determine the concentration of A when the instantaneous selectivity ( S_D/XYZ) is maximum.
konkuk-chemical-engineering.tistory.com
2024 반응공학 기말고사 5번 : https://konkuk-chemical-engineering.tistory.com/19
[반응공학 - 갓성구] 2024 기말고사 5번
5. In and isothermal batch reactor, a liquid-phase reaction (A → B → C) is carried out with pure A of 2.4mol/dm^3. Determine the concentration of B after 2 hours of reaction.
konkuk-chemical-engineering.tistory.com
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