Chemical Engineering Answers

The stack gas from a boiler furnace contains 10.8 % CO2, 0.2 % CO, 9.0 % O2 and 80.0 % N2. These gases enter the stack at 400 oC; 500 kg of coal are burnt per hour. The proximate analysis of the coal as fired is 1.44 % moisture, 34.61 % volatile mater, 57.77% fixed carbon, and 6.18 % ash, and the heating value is 33.3 kJ/g. An analysis for carbon and sulfur shows these to be 78.76 % and 0.78 % respectively. Furthermore, it is known that coal from the same field averages 1.3 % N. The volatile matter of the refuse (dry) is 4 % and fixed carbon 21 %. Air in the boiler room has a temperature of 25 oC

What canonical form is used to represent the sequence (x1,x2.....xn) in order to compute the sample mean vector and sample covariance matrix?

Let (x1,x2......xn) be a sequence of vectors
In statistics one often has to compute the sample mean vector
And the sample covariance
My questions are
1.what canonical form of information would I suggest to represent the sequence (x1,x2.......xn)in order to compute the sample mean vector and the sample covariance matrix?
2.How can I verify that all the desirable properties of Canonical information are satisfied:Existence and Uniqueness, Completeness, Elementary, Empty, Combination, Update,and Compactness and Efficiency.
3.What are the minimum number of observations n for which X and V are defined?

Your boss wants to see the pressure drop between two
sections in a horizontal tube located a distance L apart. The
pressure drop is assumed to be a function of the various
parameters. You have to do experimentations in the laboratory to
analyse the empirical formula that can be used to describe the
derived relationship in part-a. You have to flow the water at 100
L/s in a 100-mm-diameter steel pipe at room temperature and
observe the subsequent data points. You have relaxation that
during experiment, viscous effects can be considered negligible
and roughness height to the pipe diameter was considered constant. Utilise the measured
data to derive an empirical relationship that can be used to estimate the pressure drop for
any fluid flowing in any pipe that has the same ratio of roughness height to pipe diameter
as the steel pipe used in the experiments, provided viscous effects are negligible.

Coffee brewing is an interesting extraction problem because the common extraction process is not very selective – the good flavours are extracted along with the bad flavours and brewing conditions like temperature and grind size are just attempts to skew extraction towards the good flavours. Approaching this problem as a chemical engineer, what are some other methods that can be used to deal with this problem?

I have some upcoming assignments. They are timed and are would be available at future dates. I need someone who’d be available around the times when these are posted and that are fluent in the topics. They are fluid mechanics, process engineering and inorganic chemistry. Serious persons only. We’d be using email primarily as it takes long to log in and send questions here. I will reimburse 50-100 per assignment. Respond here or email me at jlangsdon@outlook.com

. If 60,000 kg of whole milk containing 4% fat is to be separated in a 6 hour period into skim milk with 0.4% fat and cream with 35% fat, what are the flow rates of the two output streams from a continuous centrifuge which accomplishes this separation? Basis: 1 hour's flow of whole milk.

Producer gas analyzing 25.3% CO, 13.2% H2, 0.4% CH4, 5.4% CO2, 0.5%O2, and 55.2% N2 is burned in excess air at 25°C,245 torrs and 60%RH.Partial orsat analysis of the stack gas shows 16.3% CO2, 1.79%CO and 0.72% H2. Calculate:
A. Percent Excess Air
B. Complete Orsat Analysis Of The Stack Gas .

A pure saturated hydrocarbon is burned in excess air.Air is supplied at the rate of 284.14 cubic meter per kilogram mole of the hydrocarbon.Air enters at 30 degree celcius , 1 atm and saturated with water vapor.Partial orsat analysis of the stack gas shows 8.86% CO2 and 1.3% CO.Calculate
a. %excess air
b.Formula of the hydrocarbon
c.Complete orsat analysis of the stack gas

A mixture of saturated hydrocarbon and N2 us burned in excess air supplied at 25°C, 740 torrs with 90% RH. An orsat analysis of the stack gas shows 7.6% CO2, 2.28% CO, 1.14% H2, 6.03% O2 and 82.95% N2. With a dew point of 53.46°C. The stack gases leave at 300°C, 765 mmHg with a volume ratio of 2.049 m3 wet stack gas/m3 wet air.

a. The settling formula of hydrocarbon is?

b. The % volume of the hydrocarbon in the fuel is about?

c. The % excess air is about?