Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

ChE 103 > Gaseous Fuels > Flashcards

Gaseous Fuels Flashcards

1
Q

by hydrogenation of petroleum and oil shale

A

oil gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

It is associated with petroleum oil deposits, with coal seams or with the decay of organic matter

A

natural gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

at STP, one (1) mole of any gas occupies a volume of?

A

22.4 L

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

This equation is used to determine the amount of moisture present in the air used for combustion

A

Antoine’s Equations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

disadvantages of gaseous fuels

A
  • readily inflammable.
  • require large storage capacity.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Fuel should be compared based on the?

A

net calorific value

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

They are gaseous at normal atmospheric pressure, but may be condensed to the liquid state at normal temperature, by the application of moderate pressures

A

LPG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

other manufacture gases

A

from wood, from peat, from coal, From Petroleum and Oil Shale, From Carbides with Water (Acetylene), and By electrolytes with electricity (H2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

other components of natural gas

A

propane
nitrogen
pentane
carbon dioxide
ethane
butane

and traces of other gases, with
small amounts of sulfur compounds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

LPG are ________________ at normal atmospheric pressure, but may be ________________________ at normal temperature

A

gaseous, condensed to the liquid state

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

At normal temperature and pressure (NTP), temperature and pressure is?

A

Temperature = 20OC or 293.15
Pressure = 1 atm or 101.325 KPa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

It is a high calorific value fuel requiring no storage facilities

A

natural gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

by distillation or carbonization of wood

A

wood gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

it is the ratio of partial pressure of water vapor to the equilibrium vapor pressure of water at a given temperature

A

Relative Humidity (RH)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

It is the amount of moisture in the air compared
to what the air can “hold” at that temperature

A

relative humidity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

other term for natural gas

A

methane or fossil gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

When air is saturated, RH is ?

A

1 or 100%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

LPG is a predominant mixture of propane and butane with a small percentage of unsaturates (_______________ and ________________)

A

propylene, butylene)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

_____________________ of the dry stack gas gives the value of unknown excess O2

A

mole balance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Gaseous fuels in common use are?

A
  • producer gas
  • natural gas
  • liquefied petroleum gases (LPG)
  • blast furnace gas
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

it is a predominant mixture of propane and butane with a small percentage of unsaturates (propylene and butylene) and some lighter C2 as well as heavier C5.

A

LPG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

from Carbides with Water

A

acetylene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Since the _____________ of a gas is highly dependent in pressure and temperature, these conditions should always be identified when the volume of a gas is given.

A

volume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

by water gas reaction of petroleum and oil shale

A

oil gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
The ________________________ is the hydrogen in the fuel that uses O2 from air for combustion
net hydrogen
26
Although they are normally used as gases, they are stored and transported as liquids under pressure for convenience and ease of handling
LPG
27
These acids are __________ and affect the tubes.
corrosive
28
It is naturally occurring mixture of gaseous hydrocarbons, also known as methane gas or fossil gas
natural gas
29
If the flue gases are cooled below the dew point, H2O condenses and may dissolve CO2 and SO2 to form?
acids
30
LPG is a predominant mixture of?
propane and butane
31
It mixes with air readily and does not produce smoke or soot.
natural gas
32
The _______________ of a gaseous mixture is the temperature at which the saturation pressure of water equals the partial pressure of water vapor in the gaseous mixture.
dew point
33
by hydrogenation of coal as a by-product of the reduction of ores
blast furnace gas
34
Since most gas combustion appliances cannot utilize the heat content of the water vapour, ___________________ is of little interest.
gross calorific value
35
it is used as a tie substance to relate the fuel with the stack gas
Carb
36
advantages of gaseous fuels
- Better control of combustion. - Less excess air is needed for complete combustion. - Economy in fuel and more efficient furnace operation - Easy maintenance of oxidizing or reducing atmosphere. - There is no storage problem if the supply is available from a public supply line. - Cleanest of all types of fuels. - The distribution of gaseous fuels even over a wide area is easy through the pipe lines and as such handling of the fuel is altogether eliminated. - Gaseous fuels give an economy of heat and produce higher temperatures (as they can be preheated in regenerative furnaces and thus heat from hot flue gases can be recovered). - It is free from ash and mixes well with air to undergo complete combustion producing very little smoke.
37
Fuel should be compared based on the net calorific value. This is especially true for __________________, since increased hydrogen content results in high water formation during combustion
natural gas
38
natural gas is naturally occurring mixture of gaseous hydrocarbons, also known as?
methane gas or fossil gas
39
by carbonization of coal
coal gas
40
by water gas reaction of petroleum and oil shale
oil gas
41
examples of gaseous fuels
- Natural Gas - Liquefied Petroleum Gas (LPG) - Other Manufactured Gases
42
It has little to no sulphur content.
natural gas
43
At standard temperature and pressure (STP), temperature and pressure is?
Temperature = 0OC or 273.15 K Pressure = 1 bar or 100 KPa
44
the greater the moisture present in the gas, the higher is its?
dew point
45
by cracking of petroleum and oil shale
refinery gas
46
by gasification of coal in O2 and steam
lurgi gas
47
by gasification of coal in air
producer gas
48
the greater the _________________ present in the gas, the higher is its dew point
moisture
49
by distillation or carbonization of peat
peat gas
50
From the complete analysis of the fuel, the _________________________ and ___________________________ can be determined
theoretical oxygen, calorific value
51
The vapor pressure can be calculated using the ________________ equation
Antoine's
52
LPG is a predominant mixture of propane and butane with a small percentage of unsaturates (propylene and butylene) and some lighter ______ as well as heavier _______.
C2, C5
53
The _____________________ is equal to the total hydrogen in the fuel if no O2 is present in the fuel.
net hydrogen
54
It is lighter than air and disperses into air easily in case of leak.
natural gas
55
by gasification of coal in air and steam
water gas
56
this evaporates to produce about 250 times volume of gas
Liquid LPG
57
Cases for Gaseous Fuel
Based on Fuel Analysis Based on Flue Gas Analysis Based on Partial Analysis of the Flue Gas
58
Aside from STP and NTP, the International Standard Metric Conditions for natural gas and similar fluids are set at?
T = 288.15K (15OC) P = 1 atm.
59
primary content of natural gas
Methane at 95%
60
By electrolytes with electricity
H2

ChE 103 (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions