title: N/S-heterocyclic contaminant removal from fuels by the mesoporous metal-organic framework MIL-100: the role of the metal ion.
abstract: The influence of the metal ion in the mesoporous metal trimesate MIL-100(Al(3+), Cr(3+), Fe(3+), V(3+)) on the adsorptive removal of N/S-heterocyclic molecules from fuels has been investigated by combining isotherms for adsorption from a model fuel solution with microcalorimetric and IR spectroscopic characterizations. The results show a clear influence of the different metals (Al, Fe, Cr, V) on the affinity for the heterocyclic compounds, on the integral adsorption enthalpies, and on the uptake capacities. Among several factors, the availability of coordinatively unsaturated sites and the presence of basic sites next to the coordinative vacancies are important factors contributing to the observed affinity differences for N-heterocyclic compounds. These trends were deduced from IR spectroscopic observation of adsorbed indole molecules, which can be chemisorbed coordinatively or by formation of hydrogen bonded species. On the basis of our results we are able to propose an optimized adsorbent for the deep and selective removal of nitrogen contaminants out of fuel feeds, namely MIL-100(V).
authors: Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Arenbergpark 23, B-3001 Leuven, Belgium.
authors: Ben
authors: B
authors: Van de Voorde
authors: Mohammed
authors: M
authors: Boulhout
authors: Frederik
authors: F
authors: Vermoortele
authors: Patricia
authors: P
authors: Horcajada
authors: Denise
authors: D
authors: Cunha
authors: Ji Sun
authors: JS
authors: Lee
authors: Jong-San
authors: JS
authors: Chang
authors: Emma
authors: E
authors: Gibson
authors: Marco
authors: M
authors: Daturi
authors: Jean-Claude
authors: JC
authors: Lavalley
authors: Alexandre
authors: A
authors: Vimont
authors: Isabelle
authors: I
authors: Beurroies
authors: Dirk E
authors: DE
authors: De Vos
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D005579:Fossil Fuels; D006571:Heterocyclic Compounds / Q000737:chemistry / Q000302:isolation & purification*; D007477:Ions / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D008670:Metals / Q000737:chemistry*; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D010316:Particle Size; D016062:Porosity; D013499:Surface Properties; D014639:Vanadium / Q000737:chemistry*
chemical_list: D005579:Fossil Fuels; D006571:Heterocyclic Compounds; D007477:Ions; D008670:Metals; D009942:Organometallic Compounds; D014639:Vanadium; D000535:Aluminum; D007501:Iron