was soaked for 6 hours then the catalyst was dried and roasted for 3 hours under 150 u00b0 c the catalyst was aged for 3 hours by 100 steam at 600 u00b0 c 200 g of catalyst was weighed and placed in the riser reactor and the catalytic cracking was carried on under the following parameters a weight hourly space velocity whsv 12 h u2212 1 a ratio of the catalyst to the bio oil 16 a temperature 650 u00b0 c and a pressure 0 5 megapascal an analysis result of the cracking product is shown as table 7 1000 g of bio oil was placed in a 1500 ml three necked flask and then 0 8 g of sodium chloride and 0 6 g of polyoxypropylene ether were added with stirring the bio oil and the demulsifier were stirred for 8 minutes and then the mixture was transferred to a separating funnel to rest for 20 minutes when the lower layer which was an aqueous solution was clarified and the oil water interface was clear an upper layer which was bio oil viii was separated from the aqueous solution the performed zsm 5 clay catalyst was added to a 80 u00b0 c 1 mol l of nh 4 no 3 solution and was soaked for 6 hours then the catalyst was dried and roasted for 3 hours under 150 u00b0 c the catalyst was aged for 2 hours by 100 steam of 500 u00b0 c 200 g of catalyst was weighed and placed in a fixed fluidized bed and the catalytic cracking was carried on under the following parameters a weight hourly space velocity whsv 12 h u2212 1 a ratio of the catalyst to the.