Design applications coal gasification

The solvent elimination problem became less of a problem with the commercialization of microbore columns. Hayes et al. (54) studied gradient HPLC-MS using microbore columns and a moving-belt interface. The heart of the system was the spray deposition device designed to be compatible with microbore-column flow rates. Nebulization of the eluent was found to be applicable to a variety of mobile-phase compositions and thus was readily compatible with gradient elution. Figure 13 shows a comparison of UV detection with that obtained with the HPLC-MS system. Applications of this system were demonstrated on water from coal gasification processes. 

Liu, G.-S. and Niksa, S. Coal conversion submodels for design applications at elevated pressures. Part II. Char gasification. Progress in Energy and Combustion Science, 2004, 18, 508. 

Major cogeneration applications are highly energy intensive and diverse, including such processes as those associated with heavy oil recovery, tar sands oil recovery, coal liquefaction, h-coal liquefaction, coal gasification, steel mill and aluminum mill processes. Several process heat applications were also considered in the design too, which are discussed in more detail later. 

Nevertheless, steam needs can vary significantly depending on the specific coal gasification process, application, and design. 

Coal gasification and partial oxidation alternatives appear to be niche applications that fit only in select and special cases. These processes are more complex and less reliable than steam reforming and are higher in capital cost. Nonetheless, future special-purpose applications may favor these technologies, such as in combined cycle power generation. In this case, a coal gas feed linked to a liquid-phase synloop may be an attractive design alternative. 

Coal gasifier designs are almost as numerous as the many different types and ranks of coal. The basic configurations, hardware, and operations that have been considered are described here because several of them are applicable to biomass gasification (c/. National Academy of Engineering, 1973, and accompanying references). 

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