Galactosyl-oligosaccharides (GOS) can be produced with native enzymes in Continuous Recycle Membrane Reactors (CRMR) or with immobilized enzymes in Plug Flow Bed Reactors (PFBR). In this paper a simple three kinetic constants model was implemented and used to define the optimal operation conditions to obtain a higher GOS yield. Experimental GOS yield and productivity obtained with CRMR were in ...

Experimental and simulation-based investigations are carried out for the selective oxidation of green methanol to oxygenates dimethoxymethane (DMM) methyl formate (MF), including an initial catalyst screening, derivation a reaction kinetic model, feasibility study fixed-bed membrane reactor with oxygen distribution. The screening different supports loading vanadium revealed 6.6 wt.-% VOx/TiO2 o...

Thermochemical energy storage materials and reactors have been reviewed for a range of temperature applications. For low-temperature applications, magnesium chloride is found to be suitable candidate at temperatures up 100 °C, whereas calcium hydroxide identified appropriate medium-temperature ranging from 400 °C 650 °C. the high-temperature (750–1050 °C), oxides cobalt, manganese, copper are r...

There is increasing interest in CO2 looping cycles that involve the repeated calcination and carbonation of the sorbent as a way to capture CO2 from flue gases during the carbonation step and the generation of a pure stream of CO2 in the oxyfired calcination step. In particular, attrition of the material in these interconnected fluidized bed reactors is a problem of general concern. Attrition o...

Two methods are proposed for the determination of regional concentrations of glutamate in the rat brain as well as in human serum. Glutamate oxidase was immobilized on non-porous glass beads and glutamate dehydrogenase was immobilized on glass derivatives. These supports were employed for the construction of Single Bead String Reactors and Packed Bed Reactors, respectively, which in turn were l...

In this paper, combustion of char in the riser of circulating fluidized bed was modeled using ASPEN PLUS. Since physical and chemical phenomena are involved in the process, the model integrates the two-phase hydrodynamic sub-model with the reaction sub-model derived from the literature. In the proposed model, the fluidized bed is divided into several sections and the behavior of each section wa...

a linear low density polyethylene (lldpe) production process, including two- fuidized bed reactors in series (fbrs) and other process equipment, was completely simulated by aspen polymer plus software. fluidized bed reactors were considered as continuous stirred tank reactors (cstr consisted of polymer and gas phases). poly-srk and nrtl-rk equations of state were used to describe polymer and no...

In situ capping of polychlorinated biphenyl (PCB)-contaminated sediments with a layer of activated carbon has been proposed, but several questions remain regarding the long-term effectiveness of this remediation strategy. Here, we assess the degree to which kinetic limitations, size exclusion effects, and electrostatic repulsions impaired PCB sorption to activated carbon. Sorption of 11 PCB con...

The performance of fixed and fluidized bed reactors in the steam reforming biomass fast pyrolysis volatiles was compared, with especial attention paying to differences observed catalysts deactivation. experiments were carried out continuous regime a bench scale unit provided conical spouted for step. They on Ni-Ca/Al2O3 commercial catalyst under optimum conditions determined previous studies, i...