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関連する概念動画

The Carbon Cycle01:14

The Carbon Cycle

37.0K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
37.0K
Mechanism of heat transfer01:19

Mechanism of heat transfer

1.2K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
1.2K
Mechanisms of Heat Transfer01:14

Mechanisms of Heat Transfer

267
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
267
Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

3.2K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
3.2K
Mechanisms of Heat Transfer I01:14

Mechanisms of Heat Transfer I

4.2K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
4.2K
Global Climate Change01:50

Global Climate Change

24.2K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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関連する実験動画

Updated: Jun 7, 2025

Operation of a 25 KWth Calcium Looping Pilot-plant with High Oxygen Concentrations in the Calciner
06:34

Operation of a 25 KWth Calcium Looping Pilot-plant with High Oxygen Concentrations in the Calciner

Published on: October 25, 2017

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炭素を捕まえるために加熱

He Li1, Dan Zhao1

  • 1Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore.

Science (New York, N.Y.)
|November 14, 2024
PubMed
まとめ

高温で二酸化炭素を効率的に吸収する 新しい金属有機構造が示されています 高温のCO2分離の課題に 有望な解決策を提示しています

科学分野:

  • 材料科学
  • 化学工学
  • 環境科学

背景:

  • 二酸化炭素 (CO2) の排出は気候変動に大きく寄与している.
  • 温室効果ガスの影響を軽減するために,効果的なCO2キャプチャ技術が不可欠です.
  • 既存の方法は高温で多くの課題に直面し,その適用性を制限しています.

研究 の 目的:

  • 選択的なCO2キャプチャのための金属有機フレームワーク (MOF) を開発し,起動する.
  • 高温条件下でのMOFの性能を調査する.
  • 産業用CO2分離アプリケーションにおけるMOFの可能性を評価する.

主な方法:

  • 新しい金属有機構造材料の合成
  • 二酸化炭素の吸収性能を高めるための活性化プロセス
  • CO2吸収を測定するための高温ガス吸附実験
  • アドソルプション・イソサームと選択性の分析

主要な成果:

  • 活性化された金属有機構造は高温で CO2 を吸収する能力を示した.
  • 材料は他の一般的なガスよりもCO2に好ましい選択性を示した.
  • MOFは複数のサイクルを経て構造的整合性と吸収性能を維持した.

さらに関連する動画

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
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Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

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Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
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Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture

Published on: September 29, 2023

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関連する実験動画

Last Updated: Jun 7, 2025

Operation of a 25 KWth Calcium Looping Pilot-plant with High Oxygen Concentrations in the Calciner
06:34

Operation of a 25 KWth Calcium Looping Pilot-plant with High Oxygen Concentrations in the Calciner

Published on: October 25, 2017

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Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
09:46

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

Published on: May 19, 2019

8.1K
Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
08:00

Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture

Published on: September 29, 2023

2.3K

結論:

  • 開発された金属有機フレームワークは,高温二酸化炭素捕獲のための有望な候補である.
  • このMOFは,高温で動作する工業プロセスにおけるCO2分離のための潜在的な解決策を提供します.
  • MOFの構造を最適化することで より高い効率と安定性を得ることができます