The school has the world's top scientific research facilities and laboratories and is committed to promoting global scientific and technological progress through interdisciplinary research education and innovation Its establishment concept thin film distillation draws lessons from the "small but fine" model of California Institute of Technology in the United States and recruits master's and doctoral students globally In 2007 King Abdullah of Saudi Arabia spent more than $10 billion to build a science and technology university named after himself in Thuwal a small fishing village near Jeddah near the holy city of Mecca to fulfill his long-cherished wish 25 years ago He wants to build a university in his own land like the "Palace of Wisdom" built by the Abbasid Caliph Maimon in 832 AD to gather the world's academic elites to explore the secrets of the universe and solve the most pressing problems facing not only Saudi Arabia or the Middle East but also all mankind He wants the university to be a beacon of knowledge for the new generation Expand the full text As a young university KAUST has become one of the fastest growing academic institutions in the world in terms of academic research and citation rates KAUST ranked first in the world for two consecutive years in 2015 and 2016 surpassing Stanford University Zurich Institute of Technology Cornell University and other world-class universities according to the QS World University Ranking- "Citation Number of Papers on Unit Teaching Positions" (Citations per faculty) ranking report It highlights the influence of KAUST in the field of global scientific research According to the Academic Ranking of World Universities (ARWU) KAUST ranked 29th in the world in the field of engineering and 101-150 in the field of science in 2016 Three Picture and text express Figure 1 Schematic Diagram of Aperture Editing and Shape Mismatch Induced Separation Based on Shape Difference Figure 2 Aperture editing Synthesis and Characterization of Zr-fum (100-x) -mesx-fcu-MOF Film In contrast to the smaller size difference the molecular shape difference between N2 and CH4 is significant because N2 is linear and CH4 is tetrahedral (Figure 1A) The side view of these two molecules shows the trilobal profile of CH4 and the circular circumference of N2 (Figure 1A) MOFs constructed from metal clusters and organic linkers provide a highly tunable platform for structural design allowing precise editing of pore shape/size Among the MOFs the Zr-fum-fcu-MOF is assembled from a hexanuclear cluster [Zr6O4 (OH) 4 (O2C ?) 12] and a bis-selective-junction fumarate (fum) with a face-centered cubic (FCU) topology presenting the desired narrow pore size with a special trilobal shape (Figure 1B) Typically the CH4 tetrahedra are expected to penetrate by aligning their edges parallel to the triangular inlet boundary to fit exactly with the trilobal pore (fig 1b) molecular distillation systems In principle this penetration of CH4 can be blocked by changing the pore shape thereby destroying the original match of tetrahedral CH4 (Figure 1 C) The shape irregularity is caused by replacing the fumarate edge of the triangular window with a 2-methylfumarate ie a mesaconate (mes) moiety containing a prominent methyl group Authors' experimental exploration of the hybrid junction Zr-fum-MES-fcu-MOF membranes showed an optimal molar ratio of fum to mes of 21 for N2/CH4 separation ie a Zr-fum67-mes33-fcu-MOF with two fumarates and one mesaconate surrounds a triangular window
Figure 3 Separation Performance of Zr-fum (100-x) -mesx-fcu-MOF Membrane and Diffusion Barrier Figure 4 Under actual conditions Comprehensive evaluation of the performance of Zr-fum67-mes33-fcu-MOF membrane for N2/CH4 separation winterization filtration techno-economic comparison of distillation system with membrane distillation system and hybrid membrane distillation system Molecular modeling showed that the diffusion energy barrier of CH4 increased by more than 150% after replacing one fumarate with mesalazine in the triangular window while the diffusion energy barrier of N2 increased by only 33% thereby improving the N2/CH4 selectivity (Fig 3D โ J) In addition to its excellent separation performance the Zr-fum67-mes33-fcu-MOF membrane also exhibits excellent thermal stability Both the N2 permeability and the N2/CH4 selectivity increase at elevated temperatures and the apparent activation energies for N2 and CH4 permeation are 68 and 44 kJ ยท mol-1 respectively
Technology will focus on new energy development climate and environmental governance bioengineering applications and other worldwide scientific and technological topics closely related to human life He is confident that he will work with academic elites from all over the world to build a world-class scientific research institution Congratulations to King Abdullah University of Science and Technology! Five Literature Literature link https//wwwnaturecom/articles/s41586-022-04763-5 Original document Reply to "Natural Gas" in the background to get the original text of the document Return to Sohu to see more Responsible Editor (function() { function getBrandHtml() { var brands = [] html = ''; for(var i = 0; i < brandslength; i++) { var brand = brands[i]; if(brandslength i+1) { html+= ''+brandname+''; } else { html+= ''+brandname+'ใ'; } } return html; }; if(documentgetElementById('linkBtn')){ documentgetElementById('linkBtn')onclick = function() { $('#brands')removeClass('brand');$ ( '# tipInfo')text ( 'Real name responded'); $ ('#linkBtn')remove();$ ('real-response content')css('line-height' '20px');$ ('real-response time')css('line-height' '20px'); }; documentgetElementById('brands')innerHTML = getBrandHtml(); }; })();ใ toptiontech.com