WorksheetsIntroduction to Hydrogen Production
Total questions: 10
Worksheet time: 5mins
The slide shows that hydrogen is abundant in the universe yet scarce as a gas on Earth. Which statement best explains typical industrial sources for producing hydrogen?
Collected from hydrogen-rich metallic ores
Separated from water and hydrocarbons like methane
Extracted directly from atmospheric hydrogen gas
Sourced mainly from nitrogen and oxygen mixtures
Which energy input is non-renewable yet commonly used for hydrogen production via steam methane reforming, as implied by the listed sources and the offshore platform shown?
Electricity from wind turbines at sea
Natural gas supplied from offshore rigs
Grid electricity from mixed sources
Nuclear power from coastal reactors
Which component in the electrolyzer is the site where hydrogen gas is produced, as indicated in the diagram?
Cathode where ions and electrons meet
External circuit wiring
Membrane center layer
Anode near oxygen bubbles
Based on the renewable energy site diagram, which setup would qualify the produced hydrogen as green hydrogen?
Electrolysis powered by natural gas with CO2 venting
Electrolysis powered by diesel generators on-site
Electrolysis powered by wind turbines and solar panels
Electrolysis powered by coal-fired grid electricity
Which statement best describes the main SMR reaction used to produce hydrogen from methane?
CH4 reacts with nitrogen to form CN and H2
CH4 decomposes alone to form C and H2
CH4 reacts with oxygen to form CO2 and H2O
CH4 reacts with steam to form CO and H2
In the water-gas shift step following SMR, what is the primary transformation of carbon monoxide?
CO is adsorbed to solids without reaction
CO is hydrogenated to methane and water
CO is combusted to CO2 releasing large heat
CO is oxidized by steam to CO2 and H2
Why must external heat be supplied to the SMR reactor as shown in the plant image?
Pressure-swing adsorption operates only when cold
The water-gas shift reaction consumes excess heat
The catalyst requires cooling to avoid deactivation
The SMR reaction is endothermic and needs heat input
Which statement best describes autothermal reforming in hydrogen production?
It thermally cracks methane without any oxidant
It partially oxidizes hydrocarbons with oxygen and steam
It fully combusts methane to carbon dioxide and water
It electrolyzes water using renewable electricity sources
What role does an air separation unit play in ATR-based hydrogen plants?
Removes nitrogen from syngas after reforming
Supplies pure oxygen for partial oxidation reactions
Captures carbon dioxide for geological storage
Provides cooling water for downstream condensers
To classify hydrogen as blue, which additional technology must accompany ATR or SMR?
Membrane separation to purify nitrogen streams
Carbon capture and storage to contain CO and CO2
High-temperature electrolysis of water for oxygen
Ammonia synthesis loop to store hydrogen safely
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