General Flashcards
Difference between Fractional and Plant Yield?
Fractional yield is converted to desired product over reactant converted while plant yield is reactant converted to product over reactant fed.
Selectivity for Felder/Nanayanan vs Himmelblau
Felder: A to desired ÷ A to undesired
Himmelblau: desired ÷ undesired
Fraction of limiting reactant converted into products.
Degree of completion
Ratio of the change in the number of moles of species and it’s stoichiometric coefficient of the species in the reaction
Extent of reaction
Material or energy stream bled off from a process to prevent accumulation of inert materials that may buildup in the recycle streams
Purge
What type of reaction is combustion?
Exothermic
This apparatus consists of calibrated water-jacketed burette connected to three absorption pipettes by glass capillary tubing.
Orsat gas analyzer
Absorbents for CO2? For O2? For CO?
CO2 - Potassium hydroxide
O2 - pyrogallol or benzene 1 2 3 triol
CO - Cuprous chloride
The values of the percent excess air depends only on the theoretical air and their feed rate not on how much O2 is consumed in the reactor.
True
% mole of Ar in air
0.9340
Composition of Proximate analysis
M, VCM, FC, Ash
What makes up the net hydrogen?
Combined H2O, moisture
Originated from the decay of biomass which is converted to peat by bacterial and chemical reaction
Coal
Ranks of coal or degree of metamorphism
Anthracite
Bituminous
Sub-bitiminous
Lignite
Solid remains after the carbonization of coal
Cake
Fuel analysis is reported in mass percentage while stack gas is reported in mole percentage.
True
%VCM lost = % C lost = % GCV lost in a combustion with a coked coal and uncoked coal in the refuse.
False. They are not equal.
Three occurrence of sulphur.
Free state
Sulfide minerals
Sulfate minerals
Classification of common sulfate minerals.
Anhydrous ( barite, BaSO4 and anglesite)
Hydroxide (gypsum, epsomite?
Sulfate acts also as an additive in what type of cement?
Portland
Contains unburned sulfur and non-combustible inert materials from the fuel
Cinder
Minimum temperature at which fuel will rapidly catch fire when esposed to an open flame
Flash Point
Self-sustained combustion in the absence of a spark or a flame.
Auto-ignitiomn temp
