IISER Researchers Make Solid Material That Releases Two Fuel Gases, Pg11

Key Highlights:

• Researchers at the Indian Institute of Science Education and Research (IISER) Thiruvananthapuram have developed a novel solid chemical compound.
• This compound, named magnesium hydridomethylzincate, can release both hydrogen and methane fuel gases when heated moderately.
• The findings were published in the scientific journal Science Advances on October 7.
• The discovery offers a potential new method for the storage and transport of these crucial fuel gases.

Detailed Insights:

• The newly developed compound is composed of magnesium, zinc, hydrogen, and carbon.
• When heated in solution to 100°C, it releases hydrogen; when heated as crystals without a solvent at 80-110°C, it releases both hydrogen and methane.
• The research indicates that methane is released before hydrogen, suggesting successive chemical reactions within the compound.
• Each molecular unit of the compound can produce two molecules each of hydrogen and methane.
• This solid-state material could provide an alternative to the current methods of transporting hydrogen and methane as compressed gases, which face challenges due to low density and high costs.
• Hydrogen is a clean fuel as its combustion does not directly release carbon dioxide, but its low density makes storage and transport difficult and expensive.
• Methane is often blended with hydrogen to improve safety and efficiency, as it can reduce the risk of detonations.
• Current limitations of the compound include its sensitivity to moisture and the lack of demonstrated reversibility (ability to re-absorb gases).
• The study provides a foundation for exploring other molecular compounds using main-group elements for reversible fuel gas storage.

Scientific/Technical Concepts Involved:

• Hydrogen Fuel: A clean energy carrier that produces only water upon combustion, but is challenging to store due to its low volumetric density.
• Methane Fuel: The primary component of natural gas, used as an energy source and sometimes blended with hydrogen for safer combustion.
• Organometallic Compounds: Chemical compounds containing at least one bond between a metal atom and a carbon atom of an organic molecule.
• Main-Group Elements: Elements found in the s-block and p-block of the periodic table, known for their abundance and diverse chemical properties.