Mapping twenty years of Green Chem: Four Productive Heritages moving towards "Doubly Green Chemistry" DGC Beyond the green varnish"

Résumé En

The last twenty years have seen a tremendous turmoil in Green Chem Research and Economic developments. With the perspective of peak oil and CO2 taxation, the part of Green Chem publications dedicated to the use of rene wable resources in the last decade has become prevalent. But chemistry of renewable product can be very unsustainable, hence the emerging need of “Doubly Green Chemistry” (DGC) biosourced and sustainable concept. The scientific programs dedicated to the use of biomass seek to integrate other principles of green chemistry in addition to the seventh principle. The results exposed in the present paper were produced within an interdisciplinary research program, between economists, chemists and biochemists. Ou r aim consist in studying how scientific research programs, devoted to to using renewable resources, integrate the economic and technological dimensions of sustainable transitions in their conceptions and evolutions. Our results shows that the investment of the Green Chem. Community is based on institutionally built "visions to the future", these visions resulting from "technological roadmap"exercises. There is no unified vision of what DGC should be, but instead four distinct communities canbe observed in the field of green chemistry,. These communities are based on four distinct technological and productive heritages: PH1 Extensive thermal/catalytic deconstruction to C 1 C 5 molecules (eg; Thermo chemical transformation of biomass into syngas and refo rming.); PH2 Extensive biotechnological deconstruction to C 2 C 10 (Enzymatic transformation of biomass into small building blocks (for uses such as chemo synthetic PLA PHA). PH3 Limited chemical tailoring of extracted C 5 C 60 molecules (Use of natural ly occurring synthons (e.g. modified fatty acids for polymers); PH4 Limited deconstruction and transformations of biopolymers C x C n (Use of plant components and intricate polymolecular complexity trough innovative technologies (e.g. starch/hemicellulose /lignin/protein modif., using reactive extrusion, microwave, whole plant process) The internal logics of DGC integration by these different communities are analyzed in a supply chain analytical framework.