In this paper, a model that couples a reduced alkali kinetic mechanism for alkali sulfate formation during biomass combustion with an ash deposition model using computational fluid dynamics (CFD) techniques is presented. Starting with a detailed gas-phase kinetic mechanism for alkali chemistry, a systematic reduction procedure has been performed using sensitivity analysis to reduce the reaction mechanism to a level that can be implemented into a CFD calculation. This reduced mechanism has been validated against the full reaction mechanism under the temperature conditions that typically occur in biomass combustion furnaces. Both mechanisms are compared to the experimental data obtained using a plug flow reactor reported in the literature. An ash deposition model taking into considerations the ash-sticking probability and the condensation of potassium salts has been developed. The reduced mechanism and the deposition model developed are implemented into a CFD model to predict ash depositions in a 10 MWth bi...
M. U. Garba; D. B. Ingham; L. Ma; R. T. J. Porter; M. Pourkashnian; H. Z. Tan; Alan Williams
The two enantiomers of 2-(2-hydroxybiphenyl-4-yl)propanoic acid ((S)- and (R)-BPOH) have been selected as probes for human serum albumin (HSA). Photophysical characterization in the absence of protein led to emission maxima, singlet energies, quantum yields, and fluorescence lifetime values ... more
The photodissociation of H2O in its B band is a prototype for nonadiabatic reaction dynamics. In addition to dissociation via the adiabatic pathway to the OH(Ã2Σ+) + H fragments, it also produces the OH(X̃2Π) + H fragments through two nonadiabatic pathways: the B̃ → X̃ transition via two co ... more
Due to the widespread occurrence in the environment and potential risk toward organisms of fluoroquinolones (FQs), it is of importance to develop high efficient methods for assessing their occurrence and environmental risk. A monoclonal antibody (Mab) with broad cross-reactivity to FQs was ... more
Rohm and Haas Powder Coatings is delighted to announce that its Reading, Pennsylvania, facility is the first site in the world to receive the RCMS® Site Certification awarded by the American Chemical Council (ACC).
When Raj Gupta, Chairman and CEO of Rohm and Haas Company, became Chairman ... more