2.2. Operation steps of the equipment
The fluidized bed device comprised four parts: a feeding system, reaction system, catalyst regeneration system, and separation system. The total height of the laboratory circulating fluidized bed scaled-up reactor is 4300mm, the reactor, regenerator and separator are 800mm long, with an inner diameter of 108mm, and the riser part is 2100 mm long and 32 mm in diameter. It was mainly designed to separate catalyst and gas products in the separation tank. The catalyst enters the regenerator by gravity and the gas products are discharged through a filter in the separation tank and are collected by secondary condensation. There is a filter on the top of the separation tank to further prevent catalyst from being entrained by the product and entering the separation system. The reaction volume of the pilot plant was 11 times larger than that of the laboratory micro-reactor(total length 800 mm, inner diameter 25 mm)19, providing a more favourable basis for industrial scale-up. The liquid reaction products are quantitatively analysed by Agilent 7890 A (SE-54 capillary column) gas chromatography, and the gas phase products are quantitatively analysed by molecular sieve packed column TCD thermal conductivity cell. The circulating fluidized bed scaled-up reactor is shown in Fig. 1. The total carbon balance exceeded 97 ± 2%, which is satisfactory.