a) A chemical process plant with surrounding air contains

85ppm

butene,

2.0ppm

dimethylamine and 25 ppm n-hexane. As refers to Table 1, calculate the TLV_TWA of the mixture and consider has this level exceeded?\ (5 Marks)\ Table 1: Hazardous Chemical Data\ \\\\table[[Chemical,MW,TLV_TWA (ppm)],[Butene,56.11,250],[Dimethylamine,45.08,5],[n-Hexane,86.18,50]]\ b) An ethyl benzene polymerization process is located within a structure that is 25 meter wide, 85 meter long and 25 meter high. For chemical processing inside buildings, a standard ventilation rate is

2.5(m^(3))/(m)in

of ventilation per square meter of floor area. The temperature, pressure, saturated pressure and MW for ethyl benzene are

35\\\\deg C,1atm

,

0.0481atm

and

106.16k(g)/(k)mole

respectively (ideal gas constant

R_(g)=0.082057m^(3)

atm

/kmoleK

, non-ideal mixing factor,

k=0.1-0.5

and TLV_TWA=100 ppm).\ i) Predict overall ventilation rate required for this structure?\ (5 Marks)\ ii) If

45kg

of ethyl benzene spills and forms a 0.5-cm-deep pool on the flat concrete floor, predict the evaporation rate for the ethyl benzene?\ (7 Marks)\ iii) What concentration can be expected within the building due to this spill, assuming the ventilation rate of part (i)? Give recommendation on your result?\ (8 Marks)

a) A chemical process plant with surrounding air contains 85ppm butene, 2.0ppm dimethylamine and 25 ppm n-hexane. As refers to Table 1, calculate the TLV_TWA of the mixture and consider has this level exceeded? (5 Marks) Table 1: Hazardous Chemical Data b) An ethyl benzene polymerization process is located within a structure that is 25 meter wide, 85 meter long and 25 meter high. For chemical processing inside buildings, a standard ventilation rate is 2.5m3/min of ventilation per square meter of floor area. The temperature, pressure, saturated pressure and MW for ethyl benzene are 35C,1atm, 0.0481atm and 106.16kg/kmole respectively (ideal gas constant Rg=0.082057m3 atm/kmoleK, non-ideal mixing factor, k=0.10.5 and TLV_TWA=100 ppm). i) Predict overall ventilation rate required for this structure? (5 Marks) ii) If 45kg of ethyl benzene spills and forms a 0.5 - cm-deep pool on the flat concrete floor, predict the evaporation rate for the ethyl benzene? (7 Marks) iii) What concentration can be expected within the building due to this spill, assuming the ventilation rate of part (i)? Give recommendation on your result? (8 Marks)