Polymer Membranes for Hydrogen Separations

MRS Bulletin ◽  
2006 ◽  
Vol 31 (10) ◽  
pp. 745-749 ◽  
Author(s):  
John D. Perry ◽  
Kazukiyo Nagai ◽  
William J. Koros
Keyword(s):  
Hydrogen Molecule ◽  
Polymeric Materials ◽  
Hydrogen Separation ◽  
Hydrogen Gas ◽  
Polymeric Membranes ◽  
Background Information ◽  
Separation Membranes ◽  
Current State ◽  
Diffusion Of Hydrogen ◽  
Selective Membranes

AbstractThe development of a hydrogen-based economy would generate a substantial necessity for efficient means of collecting hydrogen with a relatively high purity. Membrane separations play a major role in the separation of hydrogen gas from various gas mixtures, and this article discusses the use of polymeric materials to produce these membranes. After a review of the historical use of polymeric membranes and some background information regarding mechanisms of gas transport in membranes, this article will review the work that has been done in the two major classes of hydrogen separation membranes: hydrogen-selective membranes and hydrogen-rejective membranes. In hydrogen-selective membranes, the very small size of the hydrogen molecule is exploited to allow rapid diffusion of hydrogen through the membrane while excluding other gases. Hydrogen-rejective membranes use the significantly higher sorption of other gases to overcome the advantages of the small size of the hydrogen molecule. The discussion of these two types of membranes will be followed by a presentation of the current state of the art with regard to polymeric membranes for hydrogen separation and a discussion of the predictions for future applications and advancements in this area.

Effective Hydrogen Separation Using Ion Beam Modified Polymeric Membranes

2002 ◽  
Vol 756 ◽  
Author(s):  
M. R. Coleman ◽  
X. Xu ◽  
J. Ilconich ◽  
J. Ritchie ◽  
L. Hu
Keyword(s):  
High Purity ◽  
Ion Irradiation ◽  
Ion Beam ◽  
Hydrogen Permeability ◽  
Primary Energy ◽  
Hydrogen Separation ◽  
Hydrogen Gas ◽  
Polymeric Membranes ◽  
Chemical Attack ◽  
The Impact

ABSTRACTHigh purity H2 gas streams are increasingly important for a variety of applications including feed gases for fuel cells. The potential of hydrogen gas as primary energy source has generated considerable interest in hydrogen separation technologies. We have been investigating ion beam irradiation as a method to modify polymeric membranes to enhance both hydrogen permeability and permselectivities. Combined high permeabilities and permselectivities are required to give high recoveries of high purity hydrogen. Ion irradiation typically results in the formation of numerous crosslinks within the polymer matrix that should enable these materials to maintain selectivities at high temperatures and to resist chemical attack. Helium separations over a range of temperatures of irradiated polyimides were used as a model of the hydrogen system. Finally, the impact of irradiation conditions on gas separations in these materials will be addressed.

日本における抑うつ症状に対する心理学的介入を目的とした スマートフォン用アプリケーション・プログラムのレビュー

2020 ◽  
Author(s):  
Hikari Takashina ◽  
Kengo Yokomitsu
Keyword(s):  
Depressive Symptoms ◽  
Daily Life ◽  
Behavioral Therapy ◽  
Mobile Apps ◽  
Evaluation Model ◽  
Ease Of Use ◽  
Background Information ◽  
Evidence Based ◽  
Privacy And Security ◽  
Current State

There are thousands of mobile apps delivering information and offering support and intervention in situations of daily life. The aim of this study was to identify the current state of apps for depressive symptoms or prevention of depression within the official Android and iOS app stores in Japan. The 47 apps for depression available for download from the app stores were evaluated by the App Evaluation Model regarding background information, risk/ privacy and security, evidence, ease of use, and interoperability. Also, we evaluated their primary purpose, technology components, and cognitive-behavioral therapy components. The results suggest that in general few apps have been developed that are evidence-based, secure, and provide the services that users expect. In the future, it will be necessary to develop a framework for developing and disseminating more effective apps. This study is the first review of apps for depression available in Japan and seeks to help create a framework for such apps.

scholarly journals Albanian National Action Plan for Roma Inclusion 2016–2020: A Study on the Program Achievements at the Halfway Mark

SAGE Open ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 215824402110361
Author(s):  
Gentian Qejvanaj
Keyword(s):  
Action Plan ◽  
Communist Regime ◽  
Background Information ◽  
Structured Interviews ◽  
National Action Plan ◽  
Current State ◽  
The Us ◽  
Implementation Period ◽  
Education And Employment

Roma segregation in Albania has been causing growing concern since the fall of the communist regime. In this study, we analyze the effectiveness of the Albanian national action plan for Roma inclusion 2016–2020, in 2018, halfway in its implementation period. We gathered data on education and employment from the pre-implementation period (2015) and compared it with the latest available data in 2018. Interviews with local experts and surveys by the Balkan Barometer will provide background information to assess the current state of Roma integration in Albania. Moreover, descriptive statistics from national and international institutions and structured interviews will draw an independent narrative of Roma affairs. In our conclusion, we suggest moving beyond the “us and them” approach with programs run on inertia; our findings highlight that although encouraging achievements have been reached under the 2016–2020 action plan, real inclusion is still far, as statistical achievements do not say much about the quality of the education or job training provided under the 2016–2020 action plan.

scholarly journals Current State of “Omics” Biomarkers in Pancreatic Cancer

2021 ◽  
Vol 11 (2) ◽  
pp. 127 ◽  
Author(s):  
Beste Turanli ◽  
Esra Yildirim ◽  
Gizem Gulfidan ◽  
Kazim Yalcin Arga ◽  
Raghu Sinha
Keyword(s):  
Pancreatic Cancer ◽  
Personalized Medicine ◽  
Biomarker Discovery ◽  
Survival Rates ◽  
Postoperative Recurrence ◽  
Molecular Biomarkers ◽  
Background Information ◽  
Current State ◽  
Pancreatic Cancer Screening ◽  
The Future

Pancreatic cancer is one of the most fatal malignancies and the seventh leading cause of cancer-related deaths related to late diagnosis, poor survival rates, and high incidence of metastasis. Unfortunately, pancreatic cancer is predicted to become the third leading cause of cancer deaths in the future. Therefore, diagnosis at the early stages of pancreatic cancer for initial diagnosis or postoperative recurrence is a great challenge, as well as predicting prognosis precisely in the context of biomarker discovery. From the personalized medicine perspective, the lack of molecular biomarkers for patient selection confines tailored therapy options, including selecting drugs and their doses or even diet. Currently, there is no standardized pancreatic cancer screening strategy using molecular biomarkers, but CA19-9 is the most well known marker for the detection of pancreatic cancer. In contrast, recent innovations in high-throughput techniques have enabled the discovery of specific biomarkers of cancers using genomics, transcriptomics, proteomics, metabolomics, glycomics, and metagenomics. Panels combining CA19-9 with other novel biomarkers from different “omics” levels might represent an ideal strategy for the early detection of pancreatic cancer. The systems biology approach may shed a light on biomarker identification of pancreatic cancer by integrating multi-omics approaches. In this review, we provide background information on the current state of pancreatic cancer biomarkers from multi-omics stages. Furthermore, we conclude this review on how multi-omics data may reveal new biomarkers to be used for personalized medicine in the future.

A multi-scale flow analysis in hydrogen separation membranes using a coupled DSMC-SPH method

2012 ◽  
Vol 37 (1) ◽  
pp. 894-902 ◽  
Author(s):  
Jianjun Ye ◽  
Jian Yang ◽  
Jinyang Zheng ◽  
Xianting Ding ◽  
Ieong Wong ◽  
...  
Keyword(s):  
Flow Analysis ◽  
Hydrogen Separation ◽  
Sph Method ◽  
Multi Scale ◽  
Separation Membranes

scholarly journals A radical polymer for highly efficient solar evaporation and gas separation

2021 ◽  
Author(s):  
Wei Liu ◽  
Ming Yang ◽  
Jing Liu ◽  
Meijia Yang ◽  
Jing Li ◽  
...  
Keyword(s):  
Gas Separation ◽  
Membrane Separation ◽  
Hydrogen Separation ◽  
Solar Irradiation ◽  
Separation Processes ◽  
Highly Efficient ◽  
Separation Membranes ◽  
Gas Separation Membranes ◽  
Transport Channels ◽  
The Impact

Abstract The unique magnetic, electronic and optical features derived from their unpaired electrons have made radical polymers an attractive material platform for various applications. Here, we report solution-processable radical polymer membranes with multi-level porosities and study the impact of free radicals on important membrane separation processes including solar vapor generation, hydrogen separation and CO2 capture. The radical polymer is a supreme light absorber over the full solar irradiation range with sufficient water transport channels, leading to a highly efficient solar evaporation membrane. In addition, the radical polymer with micropores and adjustable functional groups are broad-spectrum gas separation membranes for both hydrogen separation and CO2 capture. First principle calculations indicate that the conjugated polymeric network bearing radicals is more chemically reactive with CO2, compared with H2, N2 and CH4. This is evidenced by a high CO2 permeability in gas separation membranes made of the conjugated radical polymer.

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