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Stoichiometry (Boards Review) > General > Flashcards

General Flashcards

1
Q

Difference between Fractional and Plant Yield?

A

Fractional yield is converted to desired product over reactant converted while plant yield is reactant converted to product over reactant fed.

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2
Q

Selectivity for Felder/Nanayanan vs Himmelblau

A

Felder: A to desired ÷ A to undesired
Himmelblau: desired ÷ undesired

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3
Q

Fraction of limiting reactant converted into products.

A

Degree of completion

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4
Q

Ratio of the change in the number of moles of species and it’s stoichiometric coefficient of the species in the reaction

A

Extent of reaction

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5
Q

Material or energy stream bled off from a process to prevent accumulation of inert materials that may buildup in the recycle streams

A

Purge

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6
Q

What type of reaction is combustion?

A

Exothermic

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7
Q

This apparatus consists of calibrated water-jacketed burette connected to three absorption pipettes by glass capillary tubing.

A

Orsat gas analyzer

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8
Q

Absorbents for CO2? For O2? For CO?

A

CO2 - Potassium hydroxide
O2 - pyrogallol or benzene 1 2 3 triol
CO - Cuprous chloride

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9
Q

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.

A

True

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10
Q

% mole of Ar in air

A

0.9340

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11
Q

Composition of Proximate analysis

A

M, VCM, FC, Ash

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12
Q

What makes up the net hydrogen?

A

Combined H2O, moisture

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13
Q

Originated from the decay of biomass which is converted to peat by bacterial and chemical reaction

A

Coal

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14
Q

Ranks of coal or degree of metamorphism

A

Anthracite
Bituminous
Sub-bitiminous
Lignite

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15
Q

Solid remains after the carbonization of coal

A

Cake

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16
Q

Fuel analysis is reported in mass percentage while stack gas is reported in mole percentage.

A

True

17
Q

%VCM lost = % C lost = % GCV lost in a combustion with a coked coal and uncoked coal in the refuse.

A

False. They are not equal.

18
Q

Three occurrence of sulphur.

A

Free state
Sulfide minerals
Sulfate minerals

19
Q

Classification of common sulfate minerals.

A

Anhydrous ( barite, BaSO4 and anglesite)

Hydroxide (gypsum, epsomite?

20
Q

Sulfate acts also as an additive in what type of cement?

A

Portland

21
Q

Contains unburned sulfur and non-combustible inert materials from the fuel

A

Cinder

22
Q

Minimum temperature at which fuel will rapidly catch fire when esposed to an open flame

A

Flash Point

23
Q

Self-sustained combustion in the absence of a spark or a flame.

A

Auto-ignitiomn temp

Stoichiometry (Boards Review) (2 decks)

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