Deeltjesbeheersing in het STFP-proces

Document uit de collectie Chemische ProcestechnologieDelftChemTechApplied Science

Developing a feasible process for 2G-lignin conversion into biofuels and chemicals

Lignin is one of the major components of lignocellulosic biomass, constituting 15-30 % of the weight and approximately 40 % of the energy content depending on the source. Currently the lignin produced in 2G bio-ethanol plants is mainly used for one-site energy production. At Eindhoven University of Technology (Inorganic Material Chemistry group) a method was explored to depolymerize lignin in super critical ethanol with cheap non-noble catalysts to produce a mixture of monomeric aromatics. The product might be applied directly as a bio marine fuel, or as a source for chemical building blocks (Resins), octane boosters or biofuels when blended with gasolines. The primary goal for pilot activities is to produce Lignin Crude Oil from lignin with a viscosity spec < 1000 cSt at 40C, on a ton scale and to collect information for designing a demo plant with the aim of having an economically viable process. As a secondary step the Lignin Crude Oil is fractionated and products tested for several applications

Lipase kinetics: hydrolysis of triacetin by lipase from Candida cylindracea in a hollow-fiber membrane reactor

The aptitude of a hollow-fiber membrane reactor to det. lipase kinetics was investigated using the hydrolysis of triacetin catalyzed by lipase from C. cylindracea as a model system. The binding of the lipase to the membrane appears not to be very specific (surface adsorption), and probably its conformation is hardly altered by immobilization, resulting in an activity comparable to that of the enzyme in its native form. The reaction kinetics defined on the membrane surface area obey Michaelis-Menten kinetics. The sp. activity of the lipase in the membrane reactor was significantly higher than in an emulsion reactor. The activity and stability of the enzyme immobilized on a hydrophilic membrane surface seem not to be influenced significantly by the choice of the membrane material. The hollow-fiber membrane reactor is a suitable tool to assess lipase kinetics in a fast and convenient way. [on SciFinder (R)