Τίτλος:
Catalytic transformation of the marine polysaccharide ulvan into rare sugars, tartaric and succinic acids
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
The green macroalga Ulva rigida represents a promising feedstock for biorefinary due to its fast growth and cosmopolitan distribution. The main component of the cell walls of U. rigida is a sulfated glucuronorhamnan polysaccharide known as ulvan. Herein it was found that due to the high (hydrogen)sulfate group content of ulvan, hydrothermal autohydrolysis at 130 °C renders a high percentage of rhamnose (78–79 % recovery from the initial content in the raw material), a rare sugar of high added value. In addition, acid catalysis by a triflate-based graphene oxide under oxygen-free conditions at 180 °C affords moderate amounts of tartaric acid (24–26 %). The same triflate-based graphene oxide catalyst under oxygen pressure yields remarkably high percentages of succinic acid (65 %). The catalyst preserves its activity for at least five consecutive reuses. © 2020 Elsevier B.V.
Συγγραφείς:
Podolean, I.
Coman, S.M.
Bucur, C.
Teodorescu, C.
Kikionis, S.
Ioannou, E.
Roussis, V.
Primo, A.
Garcia, H.
Parvulescu, V.I.
Περιοδικό:
Catalysis Today
Λέξεις-κλειδιά:
Graphene; Oxygen; Sulfur compounds, Acid catalysis; Autohydrolysis; Catalytic transformation; Oxygen pressure; Polysaccharide ulvan; Succinic acids; Sulfate groups; Tartaric acids, Catalyst activity
DOI:
10.1016/j.cattod.2020.06.086
