搜索结果: 1-15 共查到“国际动态 理学 CO2”相关记录26条 . 查询时间(0.106 秒)
MIT engineers devise technology to prevent fouling in photobioreactors for CO2 capture（图）
光生物反应器 结垢 二氧化碳捕获
2023/6/5
Algae grown in transparent tanks or tubes supplied with carbon dioxide can convert the greenhouse gas into other compounds, such as food supplements or fuels. But the process leads to a buildup of alg...
To manage atmospheric carbon dioxide and convert the gas into a useful product, Cornell scientists have dusted off an archaic – now 120 years old – electrochemical equation. The group aims to thwart t...
Using a CeO2 catalyst, researchers develop an effective catalytic process for the direct synthesis of polycarbonate diols without the need for dehydrating agents. The high yield, high selective proces...
大气CO2浓度飙升给人类带来严重挑战
大气 CO2浓度 人类 严重挑战
2020/6/8
当今大气中的二氧化碳（CO2）浓度，达到很长时间以来的最高值。据近日发表在《地质学》期刊上的一项最新研究，科学家发现当今大气CO2浓度超过了过去2300万年的最高纪录，且其飙升的速度也前所未有。自从工业化以来，人类不断升级发展需求，温室气体的排放越来越强劲。长期研究表明，从19世纪初开始，CO2浓度急剧上升，这一时间点就在工业革命的前后。目前，CO2被认为是温室效应最强的污染物之一，而CO2浓度升...
英国《自然·通讯》杂志近日发表一项环境学研究称，三叠纪末火山喷发向大气中释放的二氧化碳（CO2），可能与21世纪人为造成的CO2排放量预估值相当。如此大量的CO2可能促使了三叠纪末全球变暖、海平面上升和海洋酸化。
全球CO2排放量继续升高（图）
全球 CO2排放量 升高
2019/12/20
世界气象组织（WMO）报道，大气温室气体水平已经达到新的世界记录。今天（2019/11/25）出版的世界卫生组织《温室气体通报》表明，全球平均CO2浓度从2017年的405.5 ppm（百万分率）上升到了2018年的407.8 ppm，超过了2015年的基线400 ppm。
Researchers Set New Bar For Water-Splitting,CO2-Splitting Techniques（图）
Researchers New Bar Water-Splitting CO2-Splitting Techniques
2017/9/19
We report iron-containing mixed-oxide nanocomposites as highly effective redox materials for thermochemical CO2-splitting and methane partial oxidation in a cyclic redox scheme, where methane was intr...
Four-Stroke Engine Cycle Produces Hydrogen from Methane and Captures CO2
Four-Stroke Engine Cycle Produces Hydrogen Methane CO2
2017/3/14
When is an internal combustion engine not an internal combustion engine? When it’s been transformed into a modular reforming reactor that could make hydrogen available to power fuel cells wherever the...
A new study concludes warm climate is more sensitive to changes in CO2
warm climate more sensitive changes in CO2
2016/11/29
It is well-established in the scientific community that increases in atmospheric CO2 levels result in global warming, but the magnitude of the effect may vary depending on average global temperature. ...
What the ancient CO2 record may mean for future climate change
ancient CO2 record future climate change
2016/11/4
The last time Earth experienced both ice sheets and carbon dioxide levels within the range predicted for this century was a period of major sea level rise, melting ice sheets and upheaval of tropical ...
Proven one-step process converts CO2 and water directly into liquid hydrocarbon fuels（图）
converts CO2 water directly liquid hydrocarbon fuels
2016/3/2
A team of University of Texas at Arlington chemists and engineers have proven that concentrated light, heat and high pressures can drive the one-step conversion of carbon dioxide and water directly in...
Study Shows North Atlantic Ocean CO2 Storage Doubled Over Last Decade
carbon dioxide ocean life fossil fuels
2016/2/23
A University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science-led study shows that the North Atlantic absorbed 100 percent more man-made carbon dioxide over the last decade, compared ...
Genetic switch lets marine diatoms do less work at higher CO2
Genetic switch marine diatoms higher CO2
2015/6/18
Diatoms in the world’s oceans exhale more oxygen than all the world’s rainforests. These tiny drifting algae generate about 20 percent of the oxygen produced on Earth each year, and invisibly recycle ...
New study shows three abrupt pulses of CO2 during last deglaciation（图）
last deglaciation study
2014/12/1
CORVALLIS, Ore. – A new study shows that the rise of atmospheric carbon dioxide that contributed to the end of the last ice age more than 10,000 years ago did not occur gradually, but was characterize...
Antarctic ice sheet is result of CO2 decrease, not continental breakup
Antarctic ice sheet result of CO2 decrease not continental breakup
2014/8/14
Climate modelers from the University of New Hampshire have shown that the most likely explanation for the initiation of Antarctic glaciation during a major climate shift 34 million years ago was decre...