據氣體世界網2022年5月30日東京報道，日本東京都市大學的研究人員日前開發(fā)出了一種新的直接空氣捕獲（DAC）碳捕獲技術，據稱這個技術在去除大氣中濃度較低的有害氣體時，效率可達到99%。  

由于全球能源市場繼續(xù)推進可持續(xù)替代能源的發(fā)展，以幫助減少大氣中二氧化碳，碳捕獲技術被視為降低排放的一個重要組成部分。

使用液體系統(tǒng)，直接空氣捕獲（DAC）通過化學溶液去除二氧化碳，然后使用高溫將化學物質重新整合到過程中。

固體DAC技術使用吸附劑過濾器，在加熱、真空下釋放二氧化碳之前，用化學方法將二氧化碳結合起來，然后可以儲存或使用。  

這種新的高效方法在液固相分離系統(tǒng)中使用一種名為異氟爾酮二胺（IPDA）的化合物，以99%的效率去除大氣中含有的低濃度二氧化碳。

研究過程中進行的測試表明，IPDA可以從空氣中去除400ppm以上的二氧化碳的99%以上。  

分散在溶液中的固體也需要加熱到比其他溶液更低的溫度。在60攝氏度下，捕獲的二氧化碳可以被釋放，恢復原來的液體。

這個技術去除大氣中低濃度二氧化碳（400ppm）的速度至少是現有解決方案（如單乙醇胺）的兩倍，是世界上用于指定用途的最快技術。

在完成初步研究后，東京都市大學研究人員現在可以研究如何將這項技術應用于當前的工業(yè)應用。

李峻 編譯自 氣體世界網

原文如下：

New carbon capture method 99% efficient

A new direct air capture (DAC) carbon capture technology being developed by researchers at Tokyo Metropolitan University is claimed to be 99% efficient at removing the harmful gas from the atmosphere when at low concentrations.

As the global energy market continues to advance development of sustainable alternatives to help reduce atmospheric carbon dioxide (CO2), carbon capture is being seen as an essential component of lowering emissions. 

Using a liquid system, direct air capture (DAC) passes air through a chemical solution to remove CO2 before applying high temperatures to the reintegrate the chemicals back into the process. 

Solid DAC technology uses sorbent filters to chemically bind the CO2 before being heated, placed under a vacuum, and releasing the CO2, which can then be either stored or used. 

The new highly efficient method uses a compound called isophorone diamine (IPDA) in a liquid-solid phase separation system to remove CO2 at low concentrations contained in the atmosphere with 99% efficiency. 

Tests conducted during the research showed that the IPDA can remove more than 99% of CO2 from the air with a concentration of 400 parts per million (ppm). 

The solid dispersed in solution also required heating to a lower temperature than other solutions. At 333 K (60 celsius) the captured CO2 can be released, recovering the original liquid. 

With the ability to remove low atmospheric concentrations of CO2 (400ppm) at least twice as fast as existing solutions (such as monoethanolamine), the technology is the fastest in the world for its designated purpose. 

Having completed its initial research, the team can now look at how the technology may be applied to current industrial applications.