In the manufacture of benzaldehyde in an experimental reactor, a mixture of toluene and air is passed through a catalyst bed where it reacts to form benzaldehyde: C6H5CH3 + O2 −→ C6H5CHO + H2O Dry air and toluene gas are fed to the reactor at a temperature of 175 ◦C and at atmospheric pressure. To maintain a high yield air is supplied in 100 per cent excess over that required for complete conversion of the toluene charged. The toluene feed rate is 1.2 kmol hr−1. 13% of the toluene charge is converted to benzaldehyde and 0.5% burns to form CO2 and H2O: C6H5CH3 + 9O2 −→ 7CO2 + 4H2O Cooling water is circulated through a jacket on the converter entering at 25◦C and leaving at 40 ◦C. The hot gases leave the reactor at 190◦C. Calculate: (a) The composition of the inlet stream to the reactor. (b) The composition of the exhaust gas from the reactor. (c) The flow rate of cooling water in kg hr−1

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In the manufacture of benzaldehyde in an experimental reactor, a mixture of toluene and air is passed through a catalyst bed where it reacts to form benzaldehyde:
C6H5CH3 + O2 −→ C6H5CHO + H2O


Dry air and toluene gas are fed to the reactor at a temperature of 175 ◦C and at atmospheric pressure.


To maintain a high yield air is supplied in 100 per cent excess over that required for complete conversion
of the toluene charged. The toluene feed rate is 1.2 kmol hr−1. 13% of the toluene charge is converted to benzaldehyde and 0.5% burns to form CO2 and H2O:
C6H5CH3 + 9O2 −→ 7CO2 + 4H2O


Cooling water is circulated through a jacket on the converter entering at 25◦C and leaving at 40 ◦C. The hot gases leave the reactor at 190◦C.

Calculate:
(a) The composition of the inlet stream to the reactor.
(b) The composition of the exhaust gas from the reactor.
(c) The flow rate of cooling water in kg hr−1

In the manufacture of benzaldehyde in an experimental reactor, a mixture of toluene and air is passed
through a catalyst bed where it reacts to form benzaldehyde:
6.
C6H5CH3 + O2 → C6H5CHO + H2O
Dry air and toluene gas are fed to the reactor at a temperature of 175 °C and at atmospheric pressure.
To maintain a high yield air is supplied in 100 per cent excess over that required for complete conversion
of the toluene charged. The toluene feed rate is 1.2 kmol hr-1. 13% of the toluene charge is converted to
benzaldehyde and 0.5% burns to form CO2 and H2O:
C6H5 CH3 + 902 → 7CO2 + 4H2O
Cooling water is circulated through a jacket on the converter entering at 25°C and leaving at 40 °C. The
hot gases leave the reactor at 190°C. Calculate:
(a) The composition of the inlet stream to the reactor.
(b) The composition of the exhaust gas from the reactor.
(c)
The flow rate of cooling water in kg hr-1.
Transcribed Image Text:In the manufacture of benzaldehyde in an experimental reactor, a mixture of toluene and air is passed through a catalyst bed where it reacts to form benzaldehyde: 6. C6H5CH3 + O2 → C6H5CHO + H2O Dry air and toluene gas are fed to the reactor at a temperature of 175 °C and at atmospheric pressure. To maintain a high yield air is supplied in 100 per cent excess over that required for complete conversion of the toluene charged. The toluene feed rate is 1.2 kmol hr-1. 13% of the toluene charge is converted to benzaldehyde and 0.5% burns to form CO2 and H2O: C6H5 CH3 + 902 → 7CO2 + 4H2O Cooling water is circulated through a jacket on the converter entering at 25°C and leaving at 40 °C. The hot gases leave the reactor at 190°C. Calculate: (a) The composition of the inlet stream to the reactor. (b) The composition of the exhaust gas from the reactor. (c) The flow rate of cooling water in kg hr-1.
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