Syngas Characteristics

Composition of the syngas depends on the fuel as well as on the gasification process. The typical characteristics of the syngas 

Technology Supplier Coal Feed Type Oxidant Gasifier Type 

Destec Energy, U.S. Water slurry 02 Entrained flow 

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Table 2.7 provides the criteria applied in matching various technologies to applications. Note that for completeness, Table 2.7 includes the desirable syngas characteristics for synthetic fuels. 

Table 2.7 Desirable Syngas Characteristics for Different Applications Based On Current Technology Limitations... 

Table 2.13 Typical syngas characteristics of a methanol plant.

In 1979 Chem Systems initiated a program to develop a liquid-entrained catalyst reactor which would provide improved contacting of syngas with the catalyst in a three phase system (ref. 38). This reactor system uses much finer catalyst particles than the fluidized bed reactor, and the catalyst-liquid slurry circulates through the reactor. The syngas can be contacted with the catalyst-liquid slurry either counter currently or co-currently. It appears that this process is more efficient than the original fluidized bed process. However, a major problem with this type of three phase system will no doubt be the development of a suitable catalyst since it is unlikely that conventional co-precipitated Cu-ZnO-A Oj catalysts will have the desired characteristics, particularly mechanical strength. 

This is an exothermic reaction, and therefore, no energy is required (it is produced) there is no water to be overheated, and the stoichiometric H2/CO ratio of the syngas produced is 2, the optimum value for possible downstream processes. These characteristics, together with increasing... 

Table 10-3. Conversion and Energy-Efficiency Characteristics of Methane Reforming into Syngas in Gliding Arc Discharge in CO2-CH4 Mixture...

The gas stream for the alkali sorption experiments consisted of 94 vol% He, 4 vol% H2 and 2 vol% H2O it was passed over a KCl source to saturate it with KCl (about 20 ppmv). Helium was used as carrier gas, resulting in high signal intensities in the MBMS, extending the detection limit down to some lOOppbv. For the H2S and HCl sorption experiments, a synthetic biomass syngas was used as their sorption characteristics can be influenced by a number of the syngas components. 

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