A method for preparing bio-oil and soil conditioner by microwave-assisted catalytic fast pyrolysis sludge
A soil conditioner and microwave-assisted technology, applied in the field of biomass energy conversion, can solve the problems of reduction and non-discovery, and achieve the effect of simple process, good stability and rapid cracking
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Embodiment 1
[0018] 500 g spherical silicon carbide (diameter 5 mm), 500 g HZSM-5 spherical catalyst (diameter 5 mm, Si / Al=20, specific surface area 380 m 2 / g) was added to a three-necked quartz bottle with mechanical stirring and a condenser, placed in a microwave pyrolysis instrument, the temperature was raised to 450 °C with a fixed power, mechanical stirring was performed at 60 r / min, and 500 g of dried and sieved sludge powder was gradually added. After 30 minutes of addition, continue to maintain catalytic cracking at 450°C without generating fractions. Microwave cracking yields 130 g of bio-oil and 271 g of solid residue (soil conditioner). GC-MS analysis shows that the content of aromatic hydrocarbons in the pyrolysis fuel reaches 60.7%.
Embodiment 2
[0020] 500 g spherical silicon carbide (diameter 10 mm), 1000 g HZSM-5 spherical catalyst (diameter 10 mm, Si / Al=30, specific surface area 405 m 2 / g) was added to a three-necked quartz bottle with mechanical stirring and a condenser, placed in a microwave pyrolysis instrument, the temperature was raised to 550 °C with a fixed power, mechanical stirring was performed at 60 r / min, and 500 g of dried and sieved sludge powder was gradually added. After 30 minutes of addition, continue to maintain catalytic cracking at 550°C and no fractions are formed. Microwave cracking yields 136 g of bio-oil and 268 g of solid residue (soil conditioner). GC-MS analysis shows that the content of aromatic hydrocarbons in the pyrolysis fuel reaches 61.8%.
Embodiment 3
[0022] 500 g spherical silicon carbide (diameter 10 mm), 500 g HZSM-5 spherical catalyst (diameter 10 mm, Si / Al=30, specific surface area 405 m 2 / g) was added to a three-necked quartz bottle with mechanical stirring and a condenser, placed in a microwave pyrolysis instrument, the temperature was raised to 450 °C with a fixed power, mechanical stirring was performed at 70 r / min, and 500 g of dried and sieved sludge powder was gradually added. After 30 minutes of addition, continue to maintain catalytic cracking at 450°C without generating fractions. Microwave cracking yields 141 g of bio-oil and 265 g of solid residue (soil conditioner). GC-MS analysis shows that the content of aromatic hydrocarbons in the pyrolysis fuel reaches 57.3%.
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