Energy & Green Tech

Building a circular chemical economy

Carbon dioxide is essential to plant and animal life, but in excess it negatively impacts the environment by absorbing and radiating heat in the atmosphere, contributing to global warming.

Energy & Green Tech

Technique harvests waste heat from untapped sources

Thermoelectric materials convert heat to electricity or vice versa. However, their application to harvest waste heat is limited by challenges in fabrication and materials. Finding cost-effective ways to cover large and potentially ...

Energy & Green Tech

A greener, simpler way to create syngas

Researchers from UCLA Samueli School of Engineering, Rice University and UC Santa Barbara have developed an easier and greener way to create syngas.

Engineering

'Artificial leaf' successfully produces clean gas

A widely-used gas that is currently produced from fossil fuels can instead be made by an 'artificial leaf' that uses only sunlight, carbon dioxide and water, and which could eventually be used to develop a sustainable liquid ...

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Chemical reaction

A chemical reaction is a process that always results in the interconversion of chemical substances. The substance or substances initially involved in a chemical reaction are called reactants. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Classically, chemical reactions encompass changes that strictly involve the motion of electrons in the forming and breaking of chemical bonds, although the general concept of a chemical reaction, in particular the notion of a chemical equation, is applicable to transformations of elementary particles, as well as nuclear reactions. Different chemical reactions are used in combination in chemical synthesis in order to get a desired product. In biochemistry, series of chemical reactions catalyzed by enzymes form metabolic pathways, by which syntheses and decompositions ordinarily impossible in conditions within a cell are performed.

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