he major objective of a roasting process is to eliminate the Sulphur contained in the concentrate and to provide a calcine. In a roasting plant, 1000 kg per hour of molybdenum(IV) sulphide (MoS2) is roasted with 25 % excess air to obtain MoO3 calcine in a chamber-type roasting furnace. Preheated air enters the reactor at 400 K while MoS2 enters at room temperature. After the process, the waste gases leave the reactor at 1000 K, and the calcine leaves at 850 K. a) Draw process flowsheet and heat balance diagram (ref. temp is 298 K) b) Calculate the amount of off-gas per hour in moles. c) Calculate the amount of calcined MoO3 per hour in kg.
he major objective of a roasting process is to eliminate the Sulphur contained in the concentrate and to provide a calcine. In a roasting plant, 1000 kg per hour of molybdenum(IV) sulphide (MoS2) is roasted with 25 % excess air to obtain MoO3 calcine in a chamber-type roasting furnace. Preheated air enters the reactor at 400 K while MoS2 enters at room temperature. After the process, the waste gases leave the reactor at 1000 K, and the calcine leaves at 850 K. a) Draw process flowsheet and heat balance diagram (ref. temp is 298 K) b) Calculate the amount of off-gas per hour in moles. c) Calculate the amount of calcined MoO3 per hour in kg.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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- The major objective of a roasting process is to eliminate the Sulphur contained in the concentrate and
to provide a calcine. In a roasting plant, 1000 kg per hour of molybdenum(IV) sulphide (MoS2) is roasted
with 25 % excess air to obtain MoO3 calcine in a chamber-type roasting furnace. Preheated air enters
the reactor at 400 K while MoS2 enters at room temperature. After the process, the waste gases leave
the reactor at 1000 K, and the calcine leaves at 850 K.
a) Draw process flowsheet and heat balance diagram (ref. temp is 298 K)
b) Calculate the amount of off-gas per hour in moles.
c) Calculate the amount of calcined MoO3 per hour in kg.
![Supplemental:
Mo=95.95 g/mol
S= 32.06 g/mol
O=16 g/mol
N=14 g/mol
AHMos2,298K = -276.14 kj/mol
AHMO03,298K = -745.1 kj/mol
AHsozle),298K = -296.8 kj/mol
Mean value of Cp 02 = 30.10 J/mol*K
Mean value of Cp n2 = 29.05 J/mol*K
[H°so K - H°298 K]Mo03 = 20.24 kJ/mol
Mean value of Cp so2 = 47 J/mol*K
SO2](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5c6bd4da-2604-45da-a86a-cb2f5a84b5f1%2Fb5f07f70-ed62-4ce3-bcc0-7cb656a97361%2F6qp87s_processed.png&w=3840&q=75)
Transcribed Image Text:Supplemental:
Mo=95.95 g/mol
S= 32.06 g/mol
O=16 g/mol
N=14 g/mol
AHMos2,298K = -276.14 kj/mol
AHMO03,298K = -745.1 kj/mol
AHsozle),298K = -296.8 kj/mol
Mean value of Cp 02 = 30.10 J/mol*K
Mean value of Cp n2 = 29.05 J/mol*K
[H°so K - H°298 K]Mo03 = 20.24 kJ/mol
Mean value of Cp so2 = 47 J/mol*K
SO2
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