Search

Your search keyword '"Keurentjes, Jos T.F."' showing total 2 results
Start Over Author "Keurentjes, Jos T.F." Topic catalysis
2 results on '"Keurentjes, Jos T.F."'

1. Beyond Mechanical Recycling

Author

Vollmer, Ina, Jenks, Michael J.F., Roelands, Mark C.P., White, Robin J., van Harmelen, Toon, de Wild, Paul, van der Laan, Gerard P., Meirer, Florian, Keurentjes, Jos T.F., Weckhuysen, Bert M., Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Sub Inorganic Chemistry and Catalysis, and Inorganic Chemistry and Catalysis

Subjects
Plastic recycling, Chemistry(all), media_common.quotation_subject, Reviews, solvolysis, Review, Reuse, 010402 general chemistry, 01 natural sciences, plastic waste, Production (economics), Quality (business), Mixed waste, media_common, Waste management, catalysis, circularity, 010405 organic chemistry, Circular economy, SDG 8 - Decent Work and Economic Growth, General Chemistry, 0104 chemical sciences, Environmental science, Plastic waste, SDG 12 - Responsible Consumption and Production, Plastic Recycling, chemical recycling
Abstract

Increasing the stream of recycled plastic necessitates an approach beyond the traditional recycling via melting and re‐extrusion. Various chemical recycling processes have great potential to enhance recycling rates. In this Review, a summary of the various chemical recycling routes and assessment via life‐cycle analysis is complemented by an extensive list of processes developed by companies active in chemical recycling. We show that each of the currently available processes is applicable for specific plastic waste streams. Thus, only a combination of different technologies can address the plastic waste problem. Research should focus on more realistic, more contaminated and mixed waste streams, while collection and sorting infrastructure will need to be improved, that is, by stricter regulation. This Review aims to inspire both science and innovation for the production of higher value and quality products from plastic recycling suitable for reuse or valorization to create the necessary economic and environmental push for a circular economy., Plastic fantastic: Plastic can rise again and again as a new product. Researchers now know methods with which new plastics can be produced from 100 % recycled material, products that can even be used for food applications. This development is possible thanks to chemical recycling, through which polymer chains are first broken to then be reformed into new molecules, such as plastics but also other chemicals.

Published
2020
Full Text
View/download PDF

2. Membrane reactor for homogeneous catalysis in supercritical carbon dioxide

Author

Goetheer, Earl L.V., Verkerk, Arjan W., van den Broeke, Leo J.P., de Wolf, Elwin, Deelman, Berth-Jan, van Koten, Gerard, and Keurentjes, Jos T.F.

Subjects
*CARBON dioxide, *HYDROGENATION, *CATALYSIS
Abstract

A membrane reactor is presented for homogeneous catalysis in supercritical carbon dioxide with in situ catalyst separation. This concept offers the advantages of benign high-density gases, i.e., the possibility of achieving a high concentration of gaseous reactants in the same phase as the substrates and catalyst as well as easy catalyst localization by means of a membrane. For the separation of the homogeneous catalyst from the products an inorganic microporous membrane is used. The concept is demonstrated for the hydrogenation of 1-butene using a fluorous derivative of Wilkinson''s catalyst [RhCl{P–(C6H4-p-SiMe2CH2CH2C8F17)3}3]. The size of Wilkinson''s catalyst, 2–4 nm, is clearly larger than the pore diameter, 0.5–0.8 nm, of the silica membrane. The membrane will, therefore, retain the catalyst, while the substrates and products diffuse through the membrane. Stable operation and continuous production of n-butane has been achieved at a temperature of 353 K and a pressure of 20 MPa. A turnover number of 1.2×105 has been obtained during 32 h of reaction. The retention of the catalyst was checked using UV–vis spectroscopy and ICP-AAS; no rhodium or phosphorous species were detected at the permeate side of the membrane. [Copyright &y& Elsevier]

Published
2003
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results