Fischer-Tropsch synthesis is a promising route for production of light olefins via CO hydrogenation over transition metals. Co is one of the most active metals for Fischer-Tropsch synthesis. Some different variables such as preparation parameters and operational factors can strongly affect the selectivity of Fischer-Tropsch synthesis toward the special products. In the case of preparat...

A new SUZ-4 zeolite membrane with tetraethlyammonium hydroxide as the template was fabricated on mullite tube via hydrothermal sol-gel synthesis in a rotating autoclave reactor. The suitable synthesis condition was SiO2:Al2O3 ratio of 21.2 for 4 days at 155 °C crystallization under autogenous pressure. The obtained SUZ-4 possessed a high BET surface area of 396.4 m/g, total pore volume at 2.611...

This review outlines several approaches for designing new and environmentally friendly heterogeneously catalyzed oxidation processes for the synthesis of fine and intermediate chemicals. Environmentally benign oxidants such as molecular oxygen, hydrogen peroxide or nitrous oxide can be activated on suitable heterogeneous catalysts showing high activity and selectivity toward the desired oxygena...

Abstmct-This paper concerns the synthesis of dynamic output feedback controllers for minimum-phase nonlinear processes. The problem is addressed first for open-loop stable and then for general minimumphase nonlinear processes, leading to oneand two-degree-of-freedom controllers, respectively. The synthesis of the controllers essentially Involves combination of state feedback and state observers...

This paper presents the numerical investigation of the effects of the general bed characteristics such as superficial gas velocities, bed temperature, bed heights and particle size, on the direct synthesis in a 3D fluidized bed reactor. A 3D model for the gas flow, heat transfer, and mass transfer was coupled to the direct synthesis reaction mechanism verified in the literature. The model was v...

This paper introduces a new framework to support synthesis of complex engineering problems and which combines stochastic serach optimisation with ontological knowledge modelling. The framework uses Tabu search to generate new solutions and introduces the mechanism of digital certificate to translate between structural information of solutions and semantics of ontology. The solutions are respect...

Channel-fouling is a pervasive problem in continuous flow chemistry, causing poor product control and reactor failure. Droplet chemistry, in which the reaction mixture flows as discrete droplets inside an immiscible carrier liquid, prevents fouling by isolating the reaction from the channel walls. Unfortunately, the difficulty of controllably adding new reagents to an existing droplet stream ha...

A. Renken b,∗, V. Hessel a,c, P. Löb a, R. Miszczuk b, M. Uerdingen d, L. Kiwi-Minsker b a Institut für Mikrotechnik Mainz GmbH, Carl-Zeiss-Str. 18-20, D-55129 Mainz, Germany b Ecole Polytechnique Fédérale de Lausanne, SB-ISIC-GGRC-Station 6, CH-1015 Lausanne, Switzerland c Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands d Solvent Innovation GmbH, Nattermann...

OF DOCTORAL DISSERTATION AALTO UNIVERSITY SCHOOL OF SCIENCE AND TECHNOLOGY P.O. BOX 11000, FI-00076 AALTO http://www.aalto.fi Author Prasantha Reddy Mudimela Name of the dissertation CVD synthesis of carbon nanomaterials Manuscript submitted 24.08.2010 Manuscript revised 25.10.2010 Date of the defence 18.11.2010 Monograph Article dissertation (summary + original articles) Faculty Faculty of Inf...