Crystals of calcium carbonate are being deposited on a fiber that is suspended in a suspension...
Crystals of calcium carbonate are being deposited on a fiber that is suspended in a suspension of bulk concentration of 50 g/L. The flow velocity is 0.01 m/s and the fiber has a diameter of 1 mm. If the crystal diffusivity in water is given as 1.5e-12 m2/s. The solutions are aqueous. The length of the fiber is 5 mm. Determine the deposition rate of the crystals to the fiber surface.
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Crystals of calcium carbonate are being deposited on a fiber
that is suspended in a suspension...
ENVIRONMENTAL ENGINEERING, please show all work and clearly circle your answer. A settling tank is being...
ENVIRONMENTAL ENGINEERING, please show all work and clearly circle
your answer.
A settling tank is being designed to remove suspended particles through Type 1 settling. The density of the particle is 1045 kg/m23 and the density of the water is 1020 kg/m2. The diameter of the particles is 0.2 mm and the temperature is 25* C. Assuming laminar conditions, find the settling velocity, vi, for the particles. If the overflow rate is 65 m2/d m2, what is the percentage of...
2. Flow Past a Sphere Consider a bulk flow of product gas B that contains a...
2. Flow Past a Sphere Consider a bulk flow of product gas B that contains a small amount, 1.5 mol%, of unreacted reactant A. To convert the remaining reactant A into product B, a fluidized bed reactor is used that contains spherical catalyst particles of 1 mm in diameter. The particles are fluidized to such an extent that each particle can be considered as a single sphere acting independently of each other in the mass transfer and reaction process. The...
Question Five (15 marks) Sugars such as pentoses can be dehydrated to furfural using acidic ion-exchange...
Question Five (15 marks) Sugars such as pentoses can be dehydrated to furfural using acidic ion-exchange resins such as-n- butyl-3-methylimidazolium chloride as a heterogeneous catalyst. The pentoses are present in dilute concentrations, and the reaction is considered to take place instantaneously at the external catalyst pellet surface. a) What is the overall rate of the reaction? One catalyst pellet is 0.01 m in diameter, the bulk concentration of the reactant is 0.01 mol/m3, the free system liquid velocity is 1.2...
Please Answer: 3, 7-9 QUESTION 1 Cougar Run flows from the west to the east (see...
Please Answer: 3, 7-9
QUESTION 1 Cougar Run flows from the west to the east (see figure below showing the location of the river, your factory, a factory built in 2004, local farms (A-F), and water wells). Based on the shape of the stream channel, consider where one would expect significant erosion or deposition to occur. Based on your evaluation of the the figure below, which landowners (A-F) could experience the worst erosion damages to their property? Owell well Cougar...
Problem 5.28. Calcium carbonate, CaCO3, has two common crystae forms, calcite and aragonite. Thermodynamic data for these phases can be found at the back of this book (a) Which is stable at earth...
Problem 5.28. Calcium carbonate, CaCO3, has two common crystae forms, calcite and aragonite. Thermodynamic data for these phases can be found at the back of this book (a) Which is stable at earth's surface, calcite or aragonite? (b) Calculate the pressure (still at room temperature) at which the other phase should become stable. All of the values in this table are for one mole of material at 298 K and 1 bar. Following the chemical formula is the form of...
For the table below, design an ion exchange system for the removal of calcium. The flow rate to be treated is 5.45 ML/d. The system should be sized so that the minimum time between regenerations is 72...
For the table below, design an ion exchange system for the removal of calcium. The flow rate to be treated is 5.45 ML/d. The system should be sized so that the minimum time between regenerations is 72 h. The column diameter should be 3 m and there should be at least 2 columns. Pilot testing indicates optimal regeneration efficiency corresponded to using 10% NaCl solution (specific gravity = 1.07) at a salt usage rate of 310 kg NaCl per m3...
You are given a small pipe with a diameter of 1 mm flowing cooling fluid (water)...
You are given a small pipe with a diameter of 1 mm flowing
cooling fluid (water) at a temperature of 20C. Fluid flow velocity
is regulated at a constant speed
of 0.2 m / s and assumed to be uniform. If the pipe surface is
given a constant heat flux
of 6000 W / m2
and you assume the analysis is done in a fully develop area,
then
based on your design calculations, at what length of the pipe
(measured...
summarizr the followung info and write them in your own words and break them into different...
summarizr the followung info and write them in your own words and break them into different key points. 6.5 Metering Chamber: 6.5.1 The minimum size of the metering box is governed by the metering area required to obtain a representative test area for the specimen (see 7.2) and for maintenance of reasonable test accuracy. For example, for specimens incorporating air spaces or stud spaces, the metering area shall span an integral number of spaces (see 5.5). The depth of...
summatize the following info and break them into differeng key points. write them in yojr own...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...
ENVIRONMENTAL ENGINEERING, please show all work and clearly circle
your answer.
A settling tank is being designed to remove suspended particles through Type 1 settling. The density of the particle is 1045 kg/m23 and the density of the water is 1020 kg/m2. The diameter of the particles is 0.2 mm and the temperature is 25* C. Assuming laminar conditions, find the settling velocity, vi, for the particles. If the overflow rate is 65 m2/d m2, what is the percentage of...
2. Flow Past a Sphere Consider a bulk flow of product gas B that contains a small amount, 1.5 mol%, of unreacted reactant A. To convert the remaining reactant A into product B, a fluidized bed reactor is used that contains spherical catalyst particles of 1 mm in diameter. The particles are fluidized to such an extent that each particle can be considered as a single sphere acting independently of each other in the mass transfer and reaction process. The...
Question Five (15 marks) Sugars such as pentoses can be dehydrated to furfural using acidic ion-exchange resins such as-n- butyl-3-methylimidazolium chloride as a heterogeneous catalyst. The pentoses are present in dilute concentrations, and the reaction is considered to take place instantaneously at the external catalyst pellet surface. a) What is the overall rate of the reaction? One catalyst pellet is 0.01 m in diameter, the bulk concentration of the reactant is 0.01 mol/m3, the free system liquid velocity is 1.2...
Please Answer: 3, 7-9
QUESTION 1 Cougar Run flows from the west to the east (see figure below showing the location of the river, your factory, a factory built in 2004, local farms (A-F), and water wells). Based on the shape of the stream channel, consider where one would expect significant erosion or deposition to occur. Based on your evaluation of the the figure below, which landowners (A-F) could experience the worst erosion damages to their property? Owell well Cougar...
Problem 5.28. Calcium carbonate, CaCO3, has two common crystae forms, calcite and aragonite. Thermodynamic data for these phases can be found at the back of this book (a) Which is stable at earth's surface, calcite or aragonite? (b) Calculate the pressure (still at room temperature) at which the other phase should become stable. All of the values in this table are for one mole of material at 298 K and 1 bar. Following the chemical formula is the form of...
You are given a small pipe with a diameter of 1 mm flowing
cooling fluid (water) at a temperature of 20C. Fluid flow velocity
is regulated at a constant speed
of 0.2 m / s and assumed to be uniform. If the pipe surface is
given a constant heat flux
of 6000 W / m2
and you assume the analysis is done in a fully develop area,
then
based on your design calculations, at what length of the pipe
(measured...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
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