Hydrogen Gas
Hydrogen Gas - Related Videos
06:06
Hydrogenation
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2023
Source: Vy M. Dong and Zhiwei Chen, Department of Chemistry, University of California, Irvine, CA This experiment will demonstrate the hydrogenation of chalcone as an example of an alkene hydrogenation reaction (Figure 1). In this experiment, palladium on carbon (Pd/C) will be used as a heterogeneous catalyst for the process. A balloon will be used to supply the hydrogen atmosphere. Figure 1: Diagram showing the hydrogenation of chalcone to 3-phenylpropiophenone.
08:56
Catalytic Reactor: Hydrogenation of Ethylene
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA The hydrogenation of ethylene (C2H4) to ethane (C2H6) has often been studied as a model reduction reaction in characterizing new metal catalysts.1-2 While supported nickel is not the most active metal catalyst for this reaction, it is active enough that reaction can take place at < 200°C. The reaction typically involves adsorbed, dissociated hydrogen (H2) reacting...
10:23
Ideal Gas Law
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2023
Source: Laboratory of Dr. Andreas Züttel - Swiss Federal Laboratories for Materials Science and Technology The ideal gas law describes the behavior of most common gases at near-ambient conditions and the tendency of all chemical matter in the dilute limit. It is a fundamental relationship between three measurable macroscopic system variables (pressure, temperature, and volume) and the number of molecules of gas in the system, and is therefore an essential link between the microscopic and the...
07:51
Gas Absorber
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2023
Source: Michael G. Benton and Kerry M. Dooley, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Gas absorbers are used to remove contaminants from gas streams. Multiple designs are used to accomplish this objective1. A packed bed column uses gas and liquid streams running counter to each other in a column packed with loose packing materials, such as ceramics, metals, and plastics, or structured packing1. The packed bed uses surface area created by the packing to...
03:48
Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion
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2020
Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...
FAQs
Combustion releases hydrogen’s stored energy through oxidation, while a fuel cell converts the reaction into electricity through an electrochemical process. In the fuel-cell pathway, hydrogen combines with oxygen and produces electricity and water. This distinction matters when comparing energy-conversion approaches for environmental technologies, because the system determines how hydrogen’s energy is delivered and what outputs are generated.
Hydrogen’s environmental value cannot be judged only by its use as an energy carrier. Production methods strongly influence its overall impact. Electrolysis powered by renewable electricity can support low-carbon objectives, whereas production methods using fossil fuels generate carbon emissions. Environmental assessments therefore need to consider how the hydrogen was produced as well as how it is consumed.
Hydrogen can function as an energy carrier within renewable-energy systems, linking electricity generation with later energy use. When renewable electricity powers electrolysis, the energy is used to produce hydrogen rather than being consumed immediately. This makes hydrogen relevant to research on storing renewable energy and connecting that stored energy with transportation, industrial, or other low-carbon applications.
Electrolysis provides a production route whose environmental implications depend on the electricity source. When renewable electricity powers the process, hydrogen production can support low-carbon technology goals. The source of electricity remains essential to interpretation: the same production approach may have different environmental significance depending on whether its energy input comes from renewable sources or fossil-fuel-based systems.
Researchers may examine hydrogen when evaluating renewable-energy storage, transportation, industrial decarbonization, or strategies for reducing greenhouse gas emissions. These applications make hydrogen relevant to environmental science because they connect energy production and use with broader questions about carbon reduction. Studies can compare production pathways and energy-conversion options to understand which systems best support low-carbon objectives.
Hydrogen is relevant to decarbonization research because it can carry energy into transportation and industrial applications. Its potential contribution depends on both the production pathway and the conversion system used, such as combustion or fuel-cell operation. Researchers therefore consider hydrogen as part of broader strategies for reducing greenhouse gas emissions rather than treating its use alone as automatically low-carbon.
A useful comparison considers the production method, the energy source used for production, and the way hydrogen releases energy. Researchers can examine whether electrolysis uses renewable electricity, whether fossil-fuel-based production generates carbon emissions, and whether the end use relies on combustion or a fuel cell. Together, these factors clarify hydrogen’s environmental implications across different energy systems.