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A method for preparing synthesis gas by microwave pyrolysis gasification of biomass

A technology of pyrolysis gasification and biomass, applied in fixed bed gasification, chemical modification of combustible gas, purification/transformation of combustible gas, etc. The effect of changing inactivation, improving the effective conversion rate, and increasing the load rate

Active Publication Date: 2018-07-20
SINOPEC DALIAN RES INST OF PETROLEUM & PETROCHEMICALS CO LTD +1
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Problems solved by technology

However, this method uses fluidized bed gasification, and the gas flow rate is fast, and it is easy to carry a large amount of particulate matter through the carbon layer, which requires subsequent deashing and impurity removal treatment.

Method used

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  • A method for preparing synthesis gas by microwave pyrolysis gasification of biomass

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preparation example Construction

[0042] The preparation of the catalyst used in the embodiment

[0043] According to the ratio of nickel nitrate, magnesium nitrate and lanthanum nitrate molar ratio 1:10:0.1, weigh 0.8mol nickel nitrate, 8mol magnesium nitrate and 0.08mol lanthanum nitrate to make 8L solution, and mix the mixed solution with 2kg silicon carbide powder evenly , and then an equal volume of urea solution (35.52 mol) was mixed and stirred by dropwise addition, while keeping the constant temperature of the reaction system at 90°C. During this process, a precipitate was gradually formed. After the reaction was complete, the precipitate was separated by centrifugation, and the precipitate was filtered and washed with deionized water to neutrality. The precipitate was dried at 90°C for 6h, and then burned at 950°C for 20h. After natural cooling, extrude into strips, the size is φ6mm×10mm, and dry for later use. The resulting catalyst is defined as Ni 0.8 Mg 8 La 0.08 o 8.85 / SiC, in which the met...

Embodiment

[0045] Biomass raw material and microwave catalyst Ni 0.8 Mg 8 La 0.08 o 8.85 / SiC is fed into bin A through screw feeder A1 according to the ratio of 1:1, and then star valve A4 is opened, the raw material falls to microwave pyrolysis reactor B by gravity, and the microwave pyrolysis reactor is filled with raw materials first and then opened Microwave generator B1, set the temperature of preheating zone, pyrolysis zone, gasification zone and reforming zone to 160°C, 550°C, 700°C and 1000°C respectively, and the corresponding microwave power is 1×10 5 W / m 3 , 4×10 5 W / m 3 , 6×10 5 W / m 3 , 8×10 5 W / m 3 . When the reactor reaches the set temperature, adjust the feed rate to 0.5kg / h. First, the raw materials are dehydrated and activated in the preheating zone for 5 minutes, and then enter the pyrolysis zone for 5 minutes. The semi-coke in the formed gas-liquid-solid products is 15%. , The pyrolysis volatile fraction is 85%, and the pyrolysis volatile fraction inclu...

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Abstract

The invention discloses a method for preparing synthetic gas through microwave pyrolysis and gasification of biomass. The method comprises the following steps: a biomass raw material sent to a bunker and a catalyst are introduced into a microwave pyrolysis reactor, and passes through a preheating zone, a pyrolysis zone, a gasification zone and a reforming zone in order for reactions of dehydration, cracking, gasification and reforming, the reformed product is performed with gas-solid separation, gas and a few of carried tar and coke are subjected to a cracking reaction in a gas lifting pipe again, synthetic gas is released from an outlet, and the coke and ash obtained by gas-solid separation can be discharged from a reactor. The method has the advantages of high biomass gasification rate and high carbon conversion rate, the obtained synthetic gas product has high quality, can satisfy synthesis requirement of a liquid fuel, and has good application prospect.

Description

technical field [0001] The invention relates to a method for preparing synthesis gas by microwave pyrolysis gasification of biomass. Background technique [0002] Among the many biomass energy utilization technologies, biomass gasification technology has low raw material requirements, high utilization rate of gasification products and less pollution. The gas products obtained can be directly used as fuel or chemical raw materials. It is a biomass energy utilization technology one of the main methods. At present, biomass gasification technology is divided into four methods according to the gasification medium used: air gasification, oxygen-enriched gasification, air-steam gasification and steam gasification. The reactors used include fixed beds (updraft and downdraft) suction), bubbling bed, fluidized bed, external / internal circulating fluidized bed, spouted bed, entrained flow bed, etc. Compared with coal gasification, biomass gasification technology still has some core te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/66C10J3/84C10J3/06
CPCC10K3/023
Inventor 王鑫张庆军刘继华张忠清
Owner SINOPEC DALIAN RES INST OF PETROLEUM & PETROCHEMICALS CO LTD
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