What Is Chemical Looping Combustion?

Chemical substance cycle refers to the cycle of chemical substances (including inorganic salts, simple substances, organic substances, etc.) composed of H, O, N, P, S and other elements from the inorganic environment to the biological community, and then from the biological community to the inorganic environment. Including the water cycle, carbon dioxide, nitrogen compounds and other chemical cycles.

Nitrogen Cycle is the material cycle of the ecosystem that describes the process of conversion between nitrogen and nitrogen-containing compounds in nature.

The nitrogen cycle is an important part of the global biogeochemical cycle. Every year, "active" nitrogen added through human activities globally causes a serious imbalance in the global nitrogen cycle, and causes a series of environments such as eutrophication, water acidification, and greenhouse gas emissions. problem.

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"Climate warming disrupts marine chemical cycle": According to a report by the Physicist Organization Network on September 8, a new study by the University of East Anglia shows that rising ocean temperatures will disrupt plankton's chemical activities such as carbon dioxide, nitrogen and phosphorus. The natural circulation of matter. The findings are published in the latest issue of Nature-Climate Change.

In the marine carbon cycle, plankton plays an important role. The process of removing half of the carbon dioxide from the atmosphere through photosynthesis and storing it under the deep sea has been isolated from the atmosphere for centuries. Researchers at the University's School of Environmental Science and Computer Science use microscopes to study phytoplankton that reproduce and grow by photosynthesis, and find that phytoplankton such as microalgae can naturally remove certain carbon dioxide in the atmosphere and play a vital role in climate control. . These phytoplankton also produce oxygen and form the basis of the fishery food chain and are therefore important for food security.

Studies have shown that water temperature has a direct impact on the ecosystems that sustain plankton in the ocean. Warming oceans will affect plankton, which in turn will drive a vicious cycle of climate change. Lead researcher Dr. Thomas Mok said: "Previous research has shown that phytoplankton communities respond to global warming through changes in diversity and productivity, but our research shows that higher temperatures directly affect the ocean's chemical cycle, and this It hasn't been proven before. "

As a collaborator, researchers at the University of Exeter have created a global computer ecosystem model that integrates global ocean temperatures, 1.5 million plankton DNA sequences collected from samples, and biochemical data.

"Research has found that temperature plays a crucial role in the chemical cycle of marine microalgae, and it affects these reactions in much the same way as nutrients and sunlight, which was previously unknown," Dr. Mok said. ^[3]