Kenny Vanreppelen
University of Hasselt
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Featured researches published by Kenny Vanreppelen.
Waste Management & Research | 2014
Kenny Vanreppelen; Sara Vanderheyden; Tom Kuppens; Sonja Schreurs; Jan Yperman; Robert Carleer
Brewer’s spent grain is a low cost residue generated by the brewing industry. Its chemical composition (high nitrogen content 4.35 wt.%, fibres, etc.) makes it very useful for the production of added value in situ nitrogenised activated carbon. The composition of brewer’s spent grain revealed high amounts of cellulose (20.8 wt.%), hemicellulose (48.78 wt.%) and lignin (11.3 wt.%). The fat, ethanol extractives and ash accounted for 8.17 wt.%, 4.7 wt.% and 3.2 wt.%, respectively. Different activated carbons were produced in a lab-scale pyrolysis/activation reactor by applying several heat and steam activation profiles on brewer’s spent grain. Activated carbon yields from 16.1 to 23.6 wt.% with high N-contents (> 2 wt.%) were obtained. The efficiency of the prepared activated carbons for phenol adsorption was studied as a function of different parameters: pH, contact time and carbon dosage relative to two commercial activated carbons. The equilibrium isotherms were described by the non-linear Langmuir and Freundlich models, and the kinetic results were fitted using the pseudo-first-order model and the pseudo-second-order model. The feasibility of an activated carbon production facility (onsite and offsite) that processes brewer’s spent grain for different input feeds is evaluated based on a techno-economic model for estimating the net present value. Even though the model assumptions start from a rather pessimistic scenario, encouraging results for a profitable production of activated carbon using brewer’s spent grain are obtained.
Clean Technologies and Environmental Policy | 2018
Tom Kuppens; Parisa Rafiaani; Kenny Vanreppelen; Jan Yperman; Robert Carleer; Sonja Schreurs; Theo Thewys; Steven Van Passel
The value of phytoextracting crops (plants cultivated for soil remediation) depends on the profitability of the sequential investment in a conversion technology aimed at the economic valorization of the plants. However, the net present value (NPV) of an investment in such an innovative technology is risky due to technical and economic uncertainties. Therefore, decision makers want to dispose of information about the probability of a positive NPV, the largest possible loss, and the crucial economic and technical parameters influencing the NPV. This paper maps the total uncertainty in the NPV of an investment in fast pyrolysis for the production of combined heat and power from willow cultivated for phytoextraction in the Belgian Campine. The probability of a positive NPV has been calculated by performing Monte Carlo simulations. Information about possible losses has been provided by means of experimental design. Both methods are then combined in order to identify the key economic and technical parameters influencing the project’s profitability. It appears that the case study has a chance of 87% of generating a positive NPV with an expected value of 3 million euro (MEUR), while worst-case scenarios predict possible losses of 7 MEUR. The amount of arable land, the biomass yield, the purchase price of the crop, the policy support, and the product yield of fast pyrolysis are identified as the most influential parameters. It is concluded that both methods, i.e., Monte Carlo simulations and experimental design, provide decision makers with complementary information with regard to economic risk.
Journal of Cleaner Production | 2015
Tom Kuppens; Miet Van Dael; Kenny Vanreppelen; Theo Thewys; Jan Yperman; Robert Carleer; Sonja Schreurs; Steven Van Passel
Chemical Engineering Journal | 2011
Kenny Vanreppelen; Tom Kuppens; Theo Thewys; Robert Carleer; Jan Yperman; Sonja Schreurs
Journal of Radioanalytical and Nuclear Chemistry | 2016
Sara Vanderheyden; R. Van Ammel; Katarzyna Sobiech-Matura; Kenny Vanreppelen; Sonja Schreurs; Wouter Schroeyers; Jan Yperman; Robert Carleer
Chemical engineering transactions | 2014
Cal E; Ng Tran; Tom Kuppens; Miet Van Dael; Kenny Vanreppelen; Robert Carleer; Jan Yperman; Sonja Schreurs; Steven Van Passel
Journal of Sustainable Development of Energy, Water and Environment Systems | 2013
Kenny Vanreppelen; Sonja Schreurs; Tom Kuppens; Theo Thewys; Robert Carleer; Jan Yperman
Beverages | 2016
Harold Crespo Sariol; Kenny Vanreppelen; Jan Yperman; Ángel Brito Sauvanell; Robert Carleer; José Navarro Campa
Adsorption-journal of The International Adsorption Society | 2018
Sara Vanderheyden; Kenny Vanreppelen; Jan Yperman; Robert Carleer; Sonja Schreurs
Archive | 2015
Sara Vanderheyden; Raf Van Ammel; Katarzyna Sobiech-Matura; Kenny Vanreppelen; Sonja Schreurs; Wouter Schroeyers; Jan Yperman; Robert Carleer