2.2. Experimental setup
Fig. 1 shows a schematic diagram of the continuous feeding fluidized bed reactor system for catalytic pyrolysis of black-liquor lignin by co-feeding with different plastics. The system has been shown in elsewhere (Zhang et al., 2014). The reactor was designed for handling 5–200 g/h feedstocks with 32 mm ID and 280 mm free board height. 30 g of catalyst was used in all experiments. Feedstocks are fed into the reactor by two continuous feeding screw feeders. The two screw feeders were designed for quantitative determination and feeding into reactor rapidly, respectively. The fluidizing gas (N2, 99.99%) is introduced into the reactor at a rate of 250 mL/min. The hopper is swept with N2 at a rate of 100 mL/min to maintain an inert environment of the feeding unit. A cyclone is set outside of the reactor to remove and collect small particles which contain catalyst and char. The vapors are introduced into a two-stage condenser apparatus followed the cyclone. The first condenser unit is located in an ice water bath at temperature of about 0 °C. The secondary condenser unit is located in a dry ice/ethanol bath at −55 °C. Finally, the non-condensable gases are collected by gas sampling bags and analyzed by GC/FID and GC/TCD. The condensable liquid products are then analyzed by GC/MS. For a typical run, the experiment is conducted about 20 min. After reaction, the carrier gas is switched to O2 at 250 mL/min to calcine the catalyst and burn the produced char and coke. Then the effluent gas is sent into a copper converter which is maintained at 250 °C to convert CO to CO2. After the absorption of water with silica gel, the CO2 was captured by an ascarite trap. Therefore, char and coke carbon yield can be obtained via the mass of CO2 captured by the ascarite trap.
2.2 เซ็ตอัพทดลองFig. 1 shows a schematic diagram of the continuous feeding fluidized bed reactor system for catalytic pyrolysis of black-liquor lignin by co-feeding with different plastics. The system has been shown in elsewhere (Zhang et al., 2014). The reactor was designed for handling 5–200 g/h feedstocks with 32 mm ID and 280 mm free board height. 30 g of catalyst was used in all experiments. Feedstocks are fed into the reactor by two continuous feeding screw feeders. The two screw feeders were designed for quantitative determination and feeding into reactor rapidly, respectively. The fluidizing gas (N2, 99.99%) is introduced into the reactor at a rate of 250 mL/min. The hopper is swept with N2 at a rate of 100 mL/min to maintain an inert environment of the feeding unit. A cyclone is set outside of the reactor to remove and collect small particles which contain catalyst and char. The vapors are introduced into a two-stage condenser apparatus followed the cyclone. The first condenser unit is located in an ice water bath at temperature of about 0 °C. The secondary condenser unit is located in a dry ice/ethanol bath at −55 °C. Finally, the non-condensable gases are collected by gas sampling bags and analyzed by GC/FID and GC/TCD. The condensable liquid products are then analyzed by GC/MS. For a typical run, the experiment is conducted about 20 min. After reaction, the carrier gas is switched to O2 at 250 mL/min to calcine the catalyst and burn the produced char and coke. Then the effluent gas is sent into a copper converter which is maintained at 250 °C to convert CO to CO2. After the absorption of water with silica gel, the CO2 was captured by an ascarite trap. Therefore, char and coke carbon yield can be obtained via the mass of CO2 captured by the ascarite trap.
การแปล กรุณารอสักครู่..
