印度加尔各答高级低温研究中心的科学家们，在由政府资助的研究项目——设计开发改进的变压吸附（ＰＳＡ）技术中获得了初步成功。目前，该研究组已生产出一种新等级的颗粒状和粉末状的活性炭，希望能够用作更有效、低成本的吸附介质。他们还设计了一种低温恒温器用于监测新介质的比热、吸附热和等温吸附线。 Scientists at the Center for Advanced Cryogenic Research in Calcutta, India, have achieved initial success in designing and developing improved pressure swing adsorption (PSA) technology, a government funded research project. At present, the research team has produced a new grade of granular and powdered activated carbon, hoping to be able to use it as a more efficient and cost-effective adsorbent medium. They also designed a cryostat to monitor the specific heat, adsorption heat and isotherm of new media.