Discuss the conditions for formation the oxide and carbide

Assignment Help Mechanical Engineering

Reference no: EM13718094

In the preparation of He, CH4 is removed but the gas composition contains a variation of CO and CO2 content. The He-CO-CO2 gas leaves the reactor at 1400 K through a nichrome alloy duct. The nichrome originally containing approximately 28-mol% Cr fails and your engineering office partner determines the duct to have less than 3 mol% Cr. The alloy sometimes fails with a thick layer of Cr2O3 and other times another engineer determined that a Cr carbide formed. A third engineer determined that Cr oxide and Cr carbide were present together within the duct.

A. With the use of a calculated stability diagram, or diagrams, discuss the conditions for the formation the oxide and carbide?

B. What carbide and/or oxide forms with lowering the total pressure, CO and/or CO2 content.

Reference no: EM13718094

Questions Cloud

Calculate the flow rate of water required : What is the water exit temperature under these new conditions, and by how much is the heat-transfer rate reduced?

Determine the change in specific entropy : Using the appropriate table, determine the change in specific entropy between the two specified states, in Btu/lb.oR. Show the states on a sketch of the T-s diagram. Include the vapor dome where appropriate.

The vapor pressure of water : When solid CaCO3 is heated, it decomposes to give solid CaO and CO2 gas. A volume of 285mL of gas is collected over water at a total pressure of 730mmHg and 16 °C. The vapor pressure of water at 16 °C is 14 mmHg. CaCO3(s)→CaO(s)+CO2(g)

Determine the indicated property-ammonia- water-refrigerant : Using the appropriate table, determine the indicated property. In each case, locate the state on sketches of the T-v and T-s diagrams. Include the vapor dome on the diagram. (a) Water at p = 0.20 bar, s = 4.3703 kJ/kg.K. Find h, in kJ/kg. (b) water a..

Discuss the conditions for formation the oxide and carbide : In the preparation of He, CH4 is removed but the gas composition contains a variation of CO and CO2 content. The He-CO-CO2 gas leaves the reactor at 1400 K through a nichrome alloy duct. The nichrome originally containing approximately 28-mol% Cr fai..

Determine the molar mass : Determine the molar mass of each of the following gases: 0.93g of a gas that occupies 410mL at 0 °C and 1.00 atm (STP). 1.26g of a gas that occupies 1.00L at 0 °C and 760 mmHg (STP). 1.54g of a gas that occupies 1.40L at 680mmHg and 22.0°C. 3.0g of a..

Constant temperature : A tank of oxygen holds 14.0L of oxygen (O2) at a pressure of 30.0atm . When the gas is released, it provides 230.L of oxygen. What is the pressure of this same gas at a volume of 230.L and constant temperature?

What would the pros and cons be of using each technique : Provide a definition, in your own terms, of frequently used logistics techniques and give an example of a real company or industry that uses this logistics technique.

Determine whether vaporization is a major concern : In coal gasifiers, refractories and metals must withstand the coal/air or coal/oxygen combusting atmospheres. The Zr-Nb-Ti system is under consideration as alternative to the Fe and Ni alloy systems because the coal combustion degrades these alloy sy..

User Account

All Pages