Next, we explained about the co-generation system by which electricity and thermal energy can be generated. In the case of BT-CGS, due to the heat balance, the reaction energy in the furnace might be shortage. Thus, the additional feedstock would be necessary. In the case of Bio-H2 production system, since off-gas through PSA is available, the additional biomass material is not required.

Also, from the viewpoint of the economic condition, the case that the additional one is fed into BT would be much better in comparison to the case without any feedstock. That is, more products (i. e. electricity and/or thermal energy) can be generated. Consequently, the economic condition of BT-CGS operation would be improved by a lot of energy products. Thus, we consider BT-CGS case in which the additional feedstock is required.

For the operation of gas-engine due to the low calorific heating value of bio-gas which means the syngas of BT gasifier, although there are sometimes problems on the heating value of fuel, we executed the process design using the practice parameters which were analysed by the engine manufacturing maker.

Table 5 shows the performance of Bio-CGS. In Tables 5, the cold gas efficiency цСоЫ, the net power efficiency ЦРош, the heat recovery efficiency ^Heat and the net total efficiency ^Toid are defined as follows:

Syngas [MJ/h]

ГІ|Cdd Feedstock [MJ/h] + Char [MJ/h] + Add. Feedstock [MJ/h]

Net Power (= Power-Auxiliary)[MJ/h]

^Pav Feedstock [MJ/h] + Add. Feedstock [MJ/h]

Steam[MJ/h] + Hot water [MJ/h]

Silent Feedstock [MJ/h] + Add. Feedstock [MJ/h]