Figures & data
Figure 1. Polygeneration of SNG, steam and electrical power by biomass gasification.
Figure 2. Fixed-bed methanation reactor with gas recirculation for cooling and steam generator. Data is compared in Table at the three marked positions.
Table 1. Description of the considered types of thermal power and the procedure for their calculation.
Figure 3. Cross-section through the steam generator naming the modelled phases. The number of pipes in this sketch is lower than in the model.
Table 2. Parameters describing the modelled steam generators.
Table 3. Input flow rates for methanation reactor, gas engine and recirculation fan as well as the power output of the gas engine and the power consumption of the recirculation fan during the three scenarios.
Table 4. Reported and simulated conditions and compositions of the gases at positions I, II and III in Figure 2 of the methanation reactor at a pressure of about 27 bar, a recirculation ratio of 1.65 and steady-state.
Table 5. Temperatures of the raw SNG and the exhaust gas at in- and outlet of the two steam generators as well as the total flow rate of the generated steam at 5 bar during the three scenarios.
Figure 4. Mass-based flow rates of the raw SNG leaving the methanation reactor (left) and of the steam collectively produced by both steam generators (right) during the three scenarios.
Table