Hyperbranched poly(amidoamine) as an efficient macroinitiator for steam cracking of naphtha

Fuel ◽  
2021 ◽  
Vol 299 ◽  
pp. 120907
Author(s):  
Gaoshun Guo ◽  
Yu Ren ◽  
Yunbo Yu ◽  
Zuwei Liao ◽  
Binbo Jiang ◽  
...  
Keyword(s):  
Hyperbranched Poly ◽  
Steam Cracking

Regioselective Gas-Phase n-Butane Transfer Dehydrogenation via Silica-Supported Pincer-Iridium Complexes

2020 ◽  
Author(s):  
Boris Sheludko ◽  
Cristina Castro ◽  
Chaitanya Khalap ◽  
Thomas Emge ◽  
Alan Goldman ◽  
...  
Keyword(s):  
Gas Phase ◽  
Active Site ◽  
Lower Cost ◽  
Open Systems ◽  
Iridium Complexes ◽  
Terminal Olefin ◽  
Molecular Precursors ◽  
Sterically Demanding ◽  
Olefin Production ◽  
Steam Cracking

<b>Abstract:</b> The production of olefins via on-purpose dehydrogenation of alkanes allows for a more efficient, selective and lower cost alternative to processes such as steam cracking. Silica-supported pincer-iridium complexes of the form [(≡SiO-<sup>R4</sup>POCOP)Ir(CO)] (<sup>R4</sup>POCOP = κ<sup>3</sup>-C<sub>6</sub>H<sub>3</sub>-2,6-(OPR<sub>2</sub>)<sub>2</sub>) are effective for acceptorless alkane dehydrogenation, and have been shown stable up to 300 °C. However, while solution-phase analogues of such species have demonstrated high regioselectivity for terminal olefin production under transfer dehydrogenation conditions at or below 240 °C, in open systems at 300 °C, regioselectivity under acceptorless dehydrogenation conditions is consistently low. In this work, complexes <a>[(≡SiO-<i><sup>t</sup></i><sup>Bu4</sup>POCOP)Ir(CO)] </a>(<b>1</b>) and [(≡SiO-<i><sup>i</sup></i><sup>Pr4</sup>PCP)Ir(CO)] (<b>2</b>) were synthesized via immobilization of molecular precursors. These complexes were used for gas-phase butane transfer dehydrogenation using increasingly sterically demanding olefins, resulting in observed selectivities of up to 77%. The results indicate that the active site is conserved upon immobilization.

scholarly journals Distribution and Transport of CO2 in Hydrated Hyperbranched Poly(ethylenimine) Membranes: A Molecular Dynamics Simulation Approach

ACS Omega ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 3390-3398
Author(s):  
Kyung Il Kim ◽  
Robin Lawler ◽  
Hyun June Moon ◽  
Pavithra Narayanan ◽  
Miles A. Sakwa-Novak ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Dynamics Simulation ◽  
Simulation Approach ◽  
Hyperbranched Poly

Hyperbranched Poly(ethylene glycol)s:  A New Class of Ion-Conducting Materials

1996 ◽  
Vol 29 (11) ◽  
pp. 3831-3838 ◽  
Author(s):  
Craig J. Hawker ◽  
Fengkui Chu ◽  
Peter J. Pomery ◽  
David J. T. Hill
Keyword(s):  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
New Class ◽  
Hyperbranched Poly ◽  
Conducting Materials ◽  
Ion Conducting ◽  
Poly Ethylene

Synthesis of A2+B3 type hyperbranched poly(amide-ether) block copolymer and its shape memory function

2021 ◽  
Vol 146 ◽  
pp. 110255
Author(s):  
Ryoji Kudo ◽  
Tadashi Tsukamoto ◽  
Shiduko Nakajo ◽  
Atsuhiro Fujimori ◽  
Yoshiyuki Oishi ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Shape Memory ◽  
Memory Function ◽  
Hyperbranched Poly

scholarly journals Thiol-yne/thiol-epoxy hybrid crosslinked materials based on propargyl modified hyperbranched poly(ethyleneimine) and diglycidylether of bisphenol A resins

RSC Advances ◽  
2016 ◽  
Vol 6 (66) ◽  
pp. 61576-61584 ◽  
Author(s):  
Cristina Acebo ◽  
Xavier Fernàndez-Francos ◽  
Xavier Ramis ◽  
Àngels Serra
Keyword(s):  
Bisphenol A ◽  
Hyperbranched Poly ◽  
Dual Curing

Photoinitiated thiol-yne reaction was combined with thermal thiol-epoxy to get thermosets by dual curing from propargyl decorated poly(ethyleneimine) and DGEBA.

Necessity and Feasibility of 3D Simulations of Steam Cracking Reactors

2015 ◽  
Vol 54 (49) ◽  
pp. 12270-12282 ◽  
Author(s):  
Pieter A. Reyniers ◽  
Carl M. Schietekat ◽  
David J. Van Cauwenberge ◽  
Laurien A. Vandewalle ◽  
Kevin M. Van Geem ◽  
...  
Keyword(s):  
3D Simulations ◽  
Steam Cracking
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