Gasification uses

Fig. 27. A Flexicoking unit combining fluid coking and gasification using three-bed fluidized beds.

In Fig. 7.68 the oxidising and sulphiding potentials of four different atmospheric environments, i.e. conventional coal combustion (A), fluidised bed combustion (B), conventional coal gasification (C) and coal gasification using nuclear heat (D), are shown on the thermochemical phase stability... 

Solid biofuel conversion into syngas by pressurized circulating fluidized bed (PCFB) gasification using steam and oxygen. 

Hanaoka, T. Yoshida, T. Fujimoto, S. Kamei, K. Flarada, M. Suzuki, Y. Flatano, FI. Yokoyama, S.-Y. Minowa, T., Flydrogen production from woody biomass by steam gasification using a C02 sorbent. Biomass and Bioenergy 2005,28,63-68. 

Gasification using heat to break down biomass or coal into a gas from which pure hydrogen can be generated. 

Minowa T, Ogi T. Yokoyama S. (1995) Hydrogen production from wet cellulose by low-temperature gasification using a reduced nickel catalyst. Chem. Lett., 286, 937-8. 

Figures 1 to 5 represent Hj, CO, CO, CH4 and C yields respectively. Figure 6 shows the Hj/CO ratio of product gas. Figures (a) correspond to the experiments carried out with a W/mb ratio close to 0.32 h and include the results of pyrolysis, steam gasification with S/B ratios of 0.53 and 1.54, and COj gasification using a C02/biomass ratio of 1.39. Figures (b) show the experimental results obtained using a W/mb ratio...

Some of the CO yields generated in CO gasification using the W/mb ratio of around 0.32 h are higher than I. This fact can be explained by the conversion of COj into CO. The S/B ratio also influences the CO yield very significantly. As can be seen in Figure 2a, an increase in the S/B ratio decreases the CO yield. 

Figures 6 and 7 show the experimental PFBG results with respect to fuel nitrogen to Ammonia and Hydrogen Cyanide. These species are known precursors for NOx formation under e.g. gas turbine combustion conditions, which is a problem when dry, high temperature gas cleaning is applied, see e.g. Hoppesteyn [9], From the results it can be concluded that a major part of the fuel-bound nitrogen is converted to Ammonia. This has also been indicated before, in the description of the pressurised fluidised bed pinewood gasification using the DWSA test rig, although somewhat lower conversion values are observed in the PFBG tests.

Minowa, T Ogi, T., Yokoyama, S. (1997) Hydrogen Production from Lignoccllulose Materials by Steam Gasification Using a Reduced Nickel Catalyst. 

Tomoaki Minowa, Tomoko Ogi, Shin-ya Yokoyama. (1995), Hydrogen Production from Wet Cellulose by Low Temperature Gasification Using a Reduced Nickel Catalyst. Chemistry Letters, 937-938... 

Kyotani, T., Ito, K., Tomita, A., and Radovic L.R. (1996). Monte Carlo simulation of carbon gasification using molecular orbital theory. AIChE J., 42, 2303—7. 

Pletka, R., Brown, R. C., and Smeenk, J., "Indirectly heated biomass gasification using a latent heat ballast. Part 1 Experimental evaluations," Biomass and Bioenergy 20,297-305,2001. 

The catalyzed gasification (using steam) of carbon solids (coals, chars, organic solid waste, graphite) to H2, CO2, and CO is utilized to convert these materials to gaseous fuels (coal gasification) [23, 212]. Describe the process. 

Application To produce substitute natural gas (SNG) from purified synthesis gas produced by coal gasification, using shift and methana-tion reactions. 

Coal gasification using a catalyst, crushed coal and synthesis gas will produce methane. 

---