Kenji Sumida, David L. Rogow, Jarad A. Mason, Thomas M. McDonald, Eric D. Bloch, Zoey R. Herm, Tae-Hyun Bae, Jeffrey R. Long

Carbon Dioxide Capture in Metal–Organic Frameworks

Photoinduced reactivity of titanium dioxide

Overview of membrane science and technology membrane transport theory membrane and modules concentration polarization reverse osmosis ultrafiltration microfiltration gas separation pervaporation ion exchange membrane processes - electrodialysis carrier facilitated transport medical applications of membranes other membranes processed.

Membrane Technology and Applications

Conceptions for heat transfer correlation of nanofluids

Generations Yi Ma,† Xiuli Wang,† Yushuai Jia,† Xiaobo Chen,‡ Hongxian Han,*,† and Can Li*,† †State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences and Dalian National Laboratory for Clean Energy, 457 Zhongshan Road, Dalian 116023, China ‡Department of Chemistry, College of Arts and Sciences, University of Missouri-Kansas City, 5100 Rockhill Road, Kansas City, Missouri 64110, United States

Titanium dioxide-based nanomaterials for photocatalytic fuel generations.

Pyrolysis of polypropylene in the presence of oxygen

The role of microwave irradiation in coal desulphurization with molten caustics

This paper reports on commercial acrylonitrile fibers of different shapes that were treated in a 1.5 or 3.0 wt.% NH{sub 2}OH methanolic solution at 80{degrees}C and then a 0.1 mol {center dot} L{sup {minus}1} NaOH aqueous solution at 30 or 80{degrees}C. The treatment was performed for various reaction periods. The intrinsic rate of adsorption of uranium from seawater using the amidoxime fibers became maximum at a certain reaction time for the NH{sub 2}OH treatment as well as the NaOH treatment and was in the range of 200-600 mg per kilogram of dry fiber per day for the first adsorption run. The adsorption rate of the optimized fibers was decreased by repeating the adsorption and desorption cycle, while that of the fibers whose NaOH treatment was not sufficient was nearly constant in spite of such repetition. The tensile strength of the adsorption fibers decreased with increasing NaOH treatment period.

Preparation and performance of amidoxime fiber adsorbents for recovery of uranium from seawater

A porous α-alumina tube of 2.4 mm o.d. with an average pore size of ca. 150 nm was coated with p-xylene solutions of polycarbosilane (PC) and polystyrene (PS). The weight fraction of PS to total solid mass (PC + PS) was varied as 0, 1, 3 and 5 wt% (denoted as PC-PSx for a solution of x wt%). Then the film was cured in air at 473 K and pyrolyzed in argon at 1223 K. The procedure of dipping, drying, and pyrolysis was repeated three or four times in total. An Si-C-O membrane that was prepared with the PC-PS1 solution exhibited an H2 permeance of 4 × 10−8mol·m−2·s−1·Pa−1 and an H2/N2 selectivity of 20 at 773 K. The PS was concentrated into ellipsoidal domains due to phase separation during the curing step, and it was depolymerized and dissipated during the pyrolysis step. All membranes were resistant to heat treatment at 1223 K in argon for 20 hours. Except for the PC-PS5 membrane, voids that were formed by the decomposition of PS did not perforate the top layer. When the PC-PS1 membrane was exposed ...

Pore structure and permeance of amorphous Si-C-O membranes with high durability at elevated temperature

Skeletal isomerization of 4,6-dimethyldibenzothiophene (4,6-DMDBT) was performed at 270 °C for 1 h at a hydrogen pressure of 2.5 MPa using a Ni-supported Y-type zeolite catalyst. Alkyldibenzothiophenes (alkyl-DBTs), which were produced by methylmigration and transalkylation, were further desulfurized at 255−300 °C for 2−120 min at a hydrogen pressure of 2.5 MPa using a CoMo/Al2O3 catalyst. The produced alkyl-DBTs, which carried 1−3 methyl groups, could be classified into three groups on the basis of activation energy for desulfurization. Group I included 2,8-DMDBT and C1-DBT, which carried no methyl groups at either the 4- or 6-position. Group III included unreacted 4,6-DMDBT, and group II contained other alkyl-DBTs with 1−3 methyl groups. No alkyl-DBTs with 4 methyl groups were found in the products of 4,6-DMDBT. The steric hindrance of the methyl groups on 4,6-DMDBT was relieved by methylmigration and transalkylation, and, as a result, the desulfurization activation energy, 37.2 kcal/mol, for 4,6-DMDBT ...

Shigeharu Morooka

Papers

Pyrolysis of polypropylene in the presence of oxygen

The role of microwave irradiation in coal desulphurization with molten caustics

Preparation and performance of amidoxime fiber adsorbents for recovery of uranium from seawater

Pore structure and permeance of amorphous Si-C-O membranes with high durability at elevated temperature

Changes in Desulfurization Reactivity of 4,6-Dimethyldibenzothiophene by Skeletal Isomerization Using a Ni-Supported Y-Type Zeolite