SSZ-42: the first high-silica large pore zeolite with an undulating, one-dimensional channel system

1997 ◽  
pp. 1775-1776 ◽  
Author(s):  
C. Y. Chen ◽  
L. W. Finger ◽  
R. C. Medrud ◽  
P. A. Crozier ◽  
I. Y. Chan ◽  
...  
Keyword(s):  
Channel System ◽  
One Dimensional ◽  
Large Pore ◽  
High Silica

ChemInform Abstract: SSZ-42: The First High-Silica Large Pore Zeolite with an Undulating, One-Dimensional Channel System.

ChemInform ◽  
2010 ◽  
Vol 28 (50) ◽  
pp. no-no
Author(s):  
C. Y. CHEN ◽  
L. W. FINGER ◽  
R. C. MEDRUD ◽  
P. A. CROZIER ◽  
I. Y. CHAN ◽  
...  
Keyword(s):  
Channel System ◽  
One Dimensional ◽  
Large Pore ◽  
High Silica

Studies on the crystallization of a novel, large-pore, high-silica molecular sieve, NCL-1

Zeolites ◽  
1994 ◽  
Vol 14 (5) ◽  
pp. 326-334 ◽  
Author(s):  
K.Ramesh Reddy ◽  
Veda Ramaswamy ◽  
R. Kumar ◽  
A.V. Ramaswamy
Keyword(s):  
Molecular Sieve ◽  
Large Pore ◽  
High Silica

An Electrodeless Melter for Vitrification of Nuclear Waste

1996 ◽  
Vol 465 ◽  
Author(s):  
J. P. Freidberg ◽  
A. J. Shajii ◽  
K. W. Wenzel ◽  
J. R. Lierzer
Keyword(s):  
High Temperature ◽  
Radioactive Waste ◽  
Nuclear Waste ◽  
Thermal Analyses ◽  
Iron Core ◽  
Leaching Rate ◽  
One Dimensional ◽  
High Silica ◽  
Waste Loading

ABSTRACTThis paper describes a new concept for a high-temperature, electrodeless melter for vitrifying radioactive wastes. Based on the principles of induction heating, it circumvents a number of difficulties associated with existing technology. The melter can operate at higher temperatures (1500–2000°C vs 1150°C), allowing for a higher quality, more durable glass which reduces the long-term leaching rate. Higher processing temperatures also enable conversion from borosilicate to high-silica glass which can accommodate 2 to 3 times as much radioactive waste, potentially halving the ultimate required long-term disposal space. Finally, with high temperatures, conversion of nuclear waste into ceramics can also be considered. This too leads to higher waste loading and the reduction of repository space. The melter is toroidal, linked by an iron core transformer that allows efficient electrical operation even at 60 Hz. One-dimensional electrical and thermal analyses are presented.

Dielectric and gas adsorption/desorption properties of x-Li(Pc) having one-dimensional channels surrounded by Pc˙− columns

CrystEngComm ◽  
2020 ◽  
Vol 22 (44) ◽  
pp. 7528-7531
Author(s):  
Miki Nishi ◽  
Norihisa Hoshino ◽  
Shin-ichiro Noro ◽  
Hitoshi Fujimoto ◽  
Tomoyuki Akutagawa ◽  
...  
Keyword(s):  
Gas Adsorption ◽  
Channel System ◽  
One Dimensional ◽  
Adsorption Desorption

A one-dimensional channel system x-Li(Pc), composed of π-radical Pc˙−, was investigated. It was revealed that this channel surrounded by Li(Pc) columns is flexible, and gas adsorption/desorption measurements showed selective properties.

Inclusion compounds of thiourea and peralkylated ammonium salts. III. Hydrogen-bonded host lattices built of thiourea and nitrate ions

1996 ◽  
Vol 52 (6) ◽  
pp. 989-998 ◽  
Author(s):  
Q. Li ◽  
T. C. W. Mak
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Channel System ◽  
Nitrate Ion ◽  
Space Group ◽  
One Dimensional ◽  
X Ray Crystallography ◽  
Packing Arrangement ◽  
Host Lattices ◽  
Hydrogen Bonded

The new inclusion complexes tetraethylammonium nitrate–thiourea (1:3), (C2H5)4N+.NO3 −. 3(NH2)2CS (1), tetra-n-propylammonium nitrate–thiourea–water (1:3:1), (n-C3H7)4N+.NO3 −.3(NH2)2CS.H2O (2), tetramethylammonium nitrate–thiourea (1:1), (CH3)4N+.NO3 −.(NH2)2CS (3), tetra-n-propylammonium nitrate–thiourea (1:1), (n-C3H7)4N+.NO3 −. (NH2)2CS (4), and tetra-n-butylammonium nitrate–thiourea (1:1), (n-C4H9)4N+.NO3 −.(NH2)2CS (5) have been prepared and characterized by X-ray crystallography. Crystal data, Mo Kα: (1), space group P{\bar 1}, a = 10.300 (2), b = 14.704 (3), c = 15.784 (4) Å, α = 75.30 (3), β = 86.98 (3), γ = 72.25 (3)°, Z = 4 and RF = 0.039 for 5034 observed data; (2), space group P21/n, a = 8.433 (2), b = 9.369 (2), c = 34.361 (7) Å, β = 91.01 (3)°, Z = 4 and RF = 0.050 for 2475 observed data; (3), space group Pnma, a = 15.720 (3), b = 8.218 (2), c = 8.709 (2) Å, Z = 4 and RF = 0.073 for 579 observed data; (4), space group P21/n, a = 8.784 (2), b = 14.421 (3), c = 15.078 (3) Å, β = 92.31 (3)°, Z = 4 and RF = 0.046 for 2507 observed data; (5), space group Pna21, a = 19.934 (3), b = 12.680 (2), c = 9.092 (3) Å, Z = 4 and RF = 0.047 for 1646 observed data. In the crystal structure of (1) infinite chains each composed of an alternate arrangement of a twisted thiourea trimer and a nitrate ion are cross-linked to form a puckered layer and further hydrogen bonding between such layers leads to a channel host framework for accommodation of the cationic guests. In the crystal structure of (2) two independent thiourea molecules are used to construct a hydrogen-bonded puckered layer normal to the c axis, whereas the remaining thiourea molecule, together with the nitrate ion and water molecule, generate another puckered layer that is parallel to the first. Hydrogen bonding between these two types of layers gives rise to a channel system running parallel to the [100] direction and the cations are stacked regularly within each column. Compounds (3), (4) and (5) have closely related crystal structures in which the cations are separated by one-dimensional, infinitely extended thiourea–nitrate composite ribbons in a sandwich-like packing arrangement.

High-Silica Zeolite SSZ-61 with Dumbbell-Shaped Extra-Large-Pore Channels

2014 ◽  
Vol 53 (39) ◽  
pp. 10398-10402 ◽  
Author(s):  
Stef Smeets ◽  
Dan Xie ◽  
Christian Baerlocher ◽  
Lynne B. McCusker ◽  
Wei Wan ◽  
...  
Keyword(s):  
Large Pore ◽  
High Silica

VPI-8:  A High-Silica Molecular Sieve with a Novel “Pinwheel” Building Unit and Its Implications for the Synthesis of Extra-Large Pore Molecular Sieves

1996 ◽  
Vol 118 (31) ◽  
pp. 7299-7310 ◽  
Author(s):  
Clemens C. Freyhardt ◽  
Raul F. Lobo ◽  
Shervin Khodabandeh ◽  
John E. Lewis, ◽  
Michael Tsapatsis ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
Molecular Sieve ◽  
Building Unit ◽  
Large Pore ◽  
High Silica

ChemInform Abstract: VPI-8: A High-Silica Molecular Sieve with a Novel “Pinwheel” Building Unit and Its Implications for the Synthesis of Extra-Large Pore Molecular Sieves.

ChemInform ◽  
2010 ◽  
Vol 27 (48) ◽  
pp. no-no
Author(s):  
C. C. FREYHARDT ◽  
R. F. LOBO ◽  
S. KHODABANDEH ◽  
J. E. JUN. LEWIS ◽  
M. TSAPATSIS ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
Molecular Sieve ◽  
Building Unit ◽  
Large Pore ◽  
High Silica
Sign in / Sign up

Export Citation Format

Share Document