A study of optimization of solar pyrolysis and catalyst recovery and reuse

2021 ◽  
Vol 237 ◽  
pp. 114094
Author(s):  
J.M. Barbosa ◽  
R.A.S. Rossi ◽  
L.A. Andrade ◽  
M.A.S. Barrozo ◽  
L.G.M. Vieira
2005 ◽  
Vol 347 (1) ◽  
pp. 161-171 ◽  
Author(s):  
Kunquan Yu ◽  
William Sommer ◽  
John?M. Richardson ◽  
Marcus Weck ◽  
Christopher?W. Jones

2020 ◽  
Author(s):  
Thomas Louis-Goff ◽  
Huu Vinh Trinh ◽  
Eileen Chen ◽  
Arnold L. Rheingold ◽  
Christian Ehm ◽  
...  

A new, efficient, catalytic difluorocarbenation of olefins to give 1,1-difluorocyclopropanes is presented. The catalyst, an organobismuth complex, uses TMSCF<sub>3</sub> as a stoichiometric difluorocarbene source. We demonstrate both the viability and robustness of this reaction over a wide range of alkenes and alkynes, including electron-poor alkenes, to generate the corresponding 1,1-difluorocyclopropanes and 1,1-difluorocyclopropenes. Ease of catalyst recovery from the reaction mixture is another attractive feature of this method. In depth experimental and theoretical studies showed that the key difluorocarbene-generating step proceeds through a bismuth non-redox synchronous mechanism generating a highly reactive free CF<sub>2</sub> in an endergonic pre-equilibrium. It is the reversibility when generating the difluorocarbene that accounts for the high selectivity, while minimizing CF<sub>2</sub>-recombination side-reactions.


ARCHALP ◽  
2020 ◽  
Vol 2020 (N. 4 / 2020) ◽  
Author(s):  
Antonio De Rossi ◽  
Laura Mascino

It hasn’t even been half a century since, in 1977, the famous book by Nuto Revelli entitled Il mondo dei vinti was published. A symbolic image, which summed up with powerful evocative efficacy the dramatic process of depopulation and dissolution of traditional Alpine societies during the twentieth century. A phenomenon that found its epicenter in the valleys of Carnia and in the south-east of France, and especially in the Piedmont’s valleys of the Cuneo area, with drop-out rates that will reach even 80-90% of the population. A little over forty years have passed by since Nuto Revelli’s book was published and since then a lot seemed to have changed. Today many prestigious and successful tourist and winter centers are experiencing a growing crisis of image and public, while the once neglected Valades ousitanes live an unprecedented season, focused on enhancing the trinomial of natural, historical, and cultural heritage. Maira Valley, Ostana in the Po Valley, Paraloup and Rittana in the Stura Valley, the upper Varaita Valley, the phenomena of rebirth are affecting all the Occitan valleys, with interesting resettlement processes that have their engine in who are defined «the new mountaineers». This renaissance of the Occitan valleys is accompanied by new forms of architecture that focus on the theme of the recovery and reuse of heritage, of dialectical confrontation with environmental and historical contexts, but without forgetting the contemporary and technological innovation.


2002 ◽  
Author(s):  
Sara Poehlein ◽  
Caroline Wilharm ◽  
Keith Sims ◽  
Dan Burch ◽  
Tom Schilling
Keyword(s):  

2020 ◽  
Vol 17 (6) ◽  
pp. 740-753
Author(s):  
Bishwajit Changmai ◽  
Gunindra Pathak ◽  
Jasha Momo H. Anal ◽  
Lalthazuala Rokhum

Due to its inherent advantages such as easy recovery and reuse of the catalysts/ reagents, and environmentally friendly nature, the heterogeneous system has gain popularity in the realm of organic synthesis. In recent years, several chemically or biologically potent molecules are achieved through heterogeneous synthesis strategies. By recalling some of the classical fundamentals of the heterogeneous system in important organic synthesis, this mini-review outlines the recent developments in the applications heterogeneous catalysts and reagents; particularly in the solid phase synthesis, esterification and transesterification reactions to produce biodiesel, and Henry reaction.


Author(s):  
Wenshan Guo ◽  
Huu Hao Ngo ◽  
Lijuan Deng ◽  
Rao Y. Surampalli ◽  
Tian C. Zhang

2021 ◽  
Vol 13 (4) ◽  
pp. 2355
Author(s):  
Tiziana Amoriello ◽  
Roberto Ciccoritti

The great global challenge in order to achieve sustainable and inclusive growth over the coming decades is the promotion of the efficient use of resources, favoring a transition to a cleaner and circular economy [...]


2011 ◽  
Vol 40 (1) ◽  
pp. 44-46 ◽  
Author(s):  
Daniel Rosario-Amorin ◽  
Manuel Gaboyard ◽  
Rodolphe Clérac ◽  
Sylvain Nlate ◽  
Karine Heuzé

2016 ◽  
Vol 10 (3) ◽  
pp. 405-416 ◽  
Author(s):  
Nadir Abbas ◽  
Godlisten N. Shao ◽  
Syed M. Imran ◽  
Muhammad S. Haider ◽  
Hee Taik Kim

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