Carbon dioxide insertion processes involving metal-carbon bonds: solid-state and solution structure of (18-crown-6) sodium pentacarbonylmethyltungstate(1-)

1987 ◽  
Vol 26 (7) ◽  
pp. 977-980 ◽  
Author(s):  
Donald J. Darensbourg ◽  
Christopher G. Bauch ◽  
Arnold L. Reingold
Keyword(s):  
Carbon Dioxide ◽  
Solid State ◽  
Solution Structure ◽  
Carbon Bonds

scholarly journals Ultralight-Weight Cellulose Aerogels from NBnMO-Stabilized Lyocell Dopes

2007 ◽  
Vol 2007 ◽  
pp. 1-4 ◽  
Author(s):  
Falk Liebner ◽  
Antje Potthast ◽  
Thomas Rosenau ◽  
Emmerich Haimer ◽  
Martin Wendland
Keyword(s):  
Carbon Dioxide ◽  
Solid State ◽  
Solution Structure ◽  
Supercritical Drying ◽  
Regenerated Cellulose ◽  
Cellulose Content ◽  
Solvent Exchange ◽  
New Materials ◽  
Specific Density ◽  
Regeneration Procedure

Cellulose aerogels are intriguing new materials produced by supercritical drying of regenerated cellulose obtained by solvent exchange of solid Lyocell moldings. FromN-methylmorpholine-N-oxide solutions with cellulose contents between 1 and 12%, dimensionally stable cellulose bodies are produced, in which the solution structure of the cellulose is largely preserved and transferred into the solid state. The specific density and surface of the obtained aerogels range from 0.05 to 0.26 g/cm3and from 172 to 284m2/g, respectively, depending on the cellulose content of the Lyocell dopes and regeneration procedure. A reliable extraction and drying procedure using supercritical carbon dioxide, the advantageous use of NBnMO as stabilizer for the Lyocell dopes, and selected physical properties of the materials is communicated.

Carbon dioxide insertion and deinsertion processes involving metal-carbon bonds: solid-state structure of [PPN][W(CO)5CH2CN]

1991 ◽  
Vol 10 (9) ◽  
pp. 3407-3410 ◽  
Author(s):  
Donald J. Darensbourg ◽  
Jennifer A. Joyce ◽  
Arnold. Rheingold
Keyword(s):  
Carbon Dioxide ◽  
Solid State ◽  
State Structure ◽  
Solid State Structure ◽  
Carbon Bonds

Cellulose aerogels: Highly porous, ultra-lightweight materials

Holzforschung ◽  
2008 ◽  
Vol 62 (2) ◽  
pp. 129-135 ◽  
Author(s):  
Falk Liebner ◽  
Antje Potthast ◽  
Thomas Rosenau ◽  
Emmerich Haimer ◽  
Martin Wendland
Keyword(s):  
Carbon Dioxide ◽  
Solid State ◽  
Solution Structure ◽  
Supercritical Drying ◽  
Regenerated Cellulose ◽  
Solvent Exchange ◽  
New Materials ◽  
Surface Areas ◽  
Degradation Reactions ◽  
Highly Porous

Abstract Cellulosic aerogels are intriguing new materials produced by supercritical drying of regenerated cellulose obtained by solvent exchange of solid Lyocell moldings. From N-methylmorpholine-N-oxide (NMMO) solutions with cellulose contents between 1 and 12%, dimensionally stable cellulose bodies are produced, in which the solution structure of the cellulose is largely preserved and transferred into the solid state, the material having densities down to 0.05 g cm-3 and surface areas of up to 280 m2 g-1. In this study, several aspects of cellulosic aerogel production are communicated: the stabilization of the cellulose solutions against degradation reactions by agents suitable for later extraction and drying, a reliable extraction and drying procedure by supercritical carbon dioxide, the advantages of DMSO/NMMO in this procedure as a solvent/non-solvent pair, and some data on the physical properties of the materials.

scholarly journals Solid-state microcellular high temperature vulcanized (HTV) silicone rubber foam with carbon dioxide

2017 ◽  
Vol 134 (20) ◽  
Author(s):  
Qian Yang ◽  
Haitao Yu ◽  
Lixian Song ◽  
Yajie Lei ◽  
Fengshun Zhang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Temperature ◽  
Solid State ◽  
Silicone Rubber

Identification of solid-state forms of cucurbit[6]uril for carbon dioxide capture

CrystEngComm ◽  
2013 ◽  
Vol 15 (8) ◽  
pp. 1528 ◽  
Author(s):  
Jian Tian ◽  
Jian Liu ◽  
Jun Liu ◽  
Praveen K. Thallapally
Keyword(s):  
Carbon Dioxide ◽  
Solid State ◽  
Carbon Dioxide Capture

Colossal Barocaloric Effects with Ultralow Hysteresis in Two-Dimensional Metal–Halide Perovskites

2021 ◽  
Author(s):  
Jarad Mason ◽  
Jinyoung Seo ◽  
Ryan McGillicuddy ◽  
Adam Slavney ◽  
Selena Zhang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Phase Transitions ◽  
Solid State ◽  
Hydrostatic Pressure ◽  
Metal Halide ◽  
Two Dimensional ◽  
Vapor Compression ◽  
Entropy Changes ◽  
Halide Perovskites ◽  
Solid State Cooling

Abstract Nearly 4,400 TWh of electricity—20% of the total consumed in the world—is used each year by refrigerators, air conditioners, and heat pumps for cooling. In addition to the 2.3 Gt of carbon dioxide emitted during the generation of this electricity, the vapor-compression-based devices that provided the bulk of this cooling emitted fluorocarbon refrigerants with a global warming potential equivalent to 1.5 Gt of carbon dioxide into the atmosphere. With population and economic growth expected to dramatically increase over the next several decades, the development of alternative cooling technologies with improved efficiency and reduced emissions will be critical to meeting global cooling needs in a more sustainable fashion. Barocaloric materials, which undergo thermal changes in response to applied hydrostatic pressure, offer the potential for solid-state cooling with high energy efficiency and zero direct emissions, as well as faster start-up times, quieter operation, greater amenability to miniaturization, and better recyclability than conventional vapor-compression systems. Efficient barocaloric cooling requires materials that undergo reversible phase transitions with large entropy changes, high sensitivity to hydrostatic pressure, and minimal hysteresis, the combination of which has been challenging to achieve in existing barocaloric materials. Here, we report a new mechanism for achieving colossal barocaloric effects near ambient temperature that exploits the large volume and conformational entropy changes of hydrocarbon chain-melting transitions within two-dimensional metal–halide perovskites. Significantly, we show how the confined nature of these order–disorder phase transitions and the synthetic tunability of layered perovskites can be leveraged to reduce phase transition hysteresis through careful control over the inorganic–organic interface. The combination of ultralow hysteresis (< 1.5 K) and high barocaloric coefficients (> 20 K/kbar) leads to large reversible isothermal entropy changes (> 200 J/kg•K) at record-low pressures (< 300 bar). We anticipate that these results will help facilitate the development of barocaloric cooling technologies and further inspire new materials and mechanisms for efficient solid-state cooling.

New electronics for the Beckman LB-1 carbon dioxide analyzer

1976 ◽  
Vol 41 (5) ◽  
pp. 781-783 ◽  
Author(s):  
G. D. Swanson ◽  
L. Arena ◽  
A. B. Arancibia ◽  
J. W. Bellville
Keyword(s):  
Carbon Dioxide ◽  
Solid State ◽  
Voltage Stabilizer ◽  
Digital Readout ◽  
Vacuum Tube ◽  
End Tidal ◽  
Detection Principle

This paper describes an amplifier and linearizer for the Beckman LB-1 carbon dioxide analyzer head. All electronics are solid state and DC regulated in contrast to the original LB-1 amplifier which was of vacuum tube design and AC regulated largely by means of a voltage stabilizer transformer. A new detection principle is adopted which reduces drift due to mechanical imperfections of the chopper motor (e.g., bearing drag), but also offers the advantage that the phasing of the chopper blades is no longer necessary. Furthermore, the amplifier with a digital readout and an end-tidal hold circuit can be built for less than $500 and is plug compatible with the LB-1 head.

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