This set of Chemical Industry Questions and Answers for Experienced people focuses on “Inorganic Chemical – Fuels and Industrial Gases”.
1. Which principle is used in the production of producer gas?
a) Steel industry’s heating
b) Heating, chemical synthesis
c) Only heating
d) Only chemical synthesis
View Answer
Explanation: Steel industry’s heating requirements like heat treat, coke ovens are used in the production of producer gas, only heating is done in the production of oil gas. Heating and chemical synthesis combinely done in order to produced water gas and coke oven gas.
2. What is the amount of coal required in the production of producer gas?
a) 60-80 kg
b) 8-10 kg
c) 25-30 kg
d) 20-25 kg
View Answer
Explanation: In producer gas production 8-10 kg steam required, 20-25 kg coke required, 25-30 kg coal required and 60-80 kg air required.
3. Which raw material is used in the production of water gas?
a) Natural gas
b) Off- gases
c) Naphtha
d) Bituminous
View Answer
Explanation: In general, bituminous, anthracite coal or cokes are used as raw materials in the production of water gas. Off-gases and naphtha is used in the production of synthesis gas.
4. What is the disadvantage related with steam reforming process for synthesis gas?
a) Keep uniform fuel surface
b) Methane impurity
c) Deposited carbon
d) Choice of scrubbing liquors
View Answer
Explanation: In steam reforming process disadvantage is use of hydrogen and generation of methane impurity. Deposited carbon and keep uniform fuel surface are the major engineering problem associated with partial combustion process for synthesis gas and producer gas production respectively.
5. In regenerative process of water gas production what fraction of total cycle time is taken by downrun operation?
a) 35%
b) 33%
c) 30%
d) 2%
View Answer
Explanation: 35% of total cycle time is taken by blow or heat up, 33% and 30% is took by downrun and uprun operation remaining 2% of total cycle time it took by short purge uprun operation.
6. Which are the variable mixture components of synthesis gas for synthesis of organic compounds?
a) CO and H2
b) H2 and N2
c) Only H2
d) CO and N2
View Answer
Explanation: Synthesis gas is generally considered to be a variable mixture of CO and H2 for synthesis of organic compounds. Mixture of H2 and N2 are for the ammonia synthesis and only H2 is for hydrogenation of coal.
7. Amine absorption of CO2 is followed by which operation?
a) Cuprous formate
b) Water scrubbing
c) Liquid N2 scrubbing
d) Caustic scrubbing
View Answer
Explanation: Caustic scrubbing is done in order to have amine absorption of CO2. Cuprous scrubbing and liquid N2 scrubbing is done in order to remove traces of CO and CO2.
8. What is ‘X’ in the following flow chart?
a) Absorber
b) Reforming furnace
c) Water gas shift converter
d) Stripper
View Answer
Explanation: Water gas shift converter is used in the reforming process in order to remove CO and produced CO2. Reforming furnace separate the fuel gas from the mixture hydrocarbon feed and air.
9. Which process is used in the production of acetylene?
a) Reforming
b) Arc process
c) Partial combustion
d) Regenerative process
View Answer
Explanation: Reforming and partial combustion is used in manufacture of synthesis gas, and water gas is associated with regenerative process thus arc process is used in the production of acetylene.
10. Which commercially economical by product is obtained from the refinery catalytic reforming process?
a) CH4
b) Cl2
c) H2
d) CO and H2
View Answer
Explanation: From the petroleum refinery catalytic reforming process H2 can be obtained as by-product which is being used for captive ammonia synthesis at refinery location.
11. Where carbon black is removed in Sachsse process?
a) Water quench
b) Co shift converter
c) Absorber
d) Lime quench
View Answer
Explanation: In sachsse process carbon black is removed in water quench and on a moving bed after that acetylene and its dimmer is absorbed in absorber. CO shift converter is used to remove CO.
12. Why dry process is inherently dangerous in the production of acetylene?
a) Explosion
b) Fire
c) Hot spot
d) Poisonous gas
View Answer
Explanation: The dry process is inherently more dangerous in production of acetylene because of temperature control in the generator and it particularly regards as hot spot. Thus, average generator conditions are maintained below 150 Celsius and 30 cm of water pressure.
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