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Method for preparing quality-improved biomass pyrolytic oil based on emulsification system electro-catalysis and obtained quality-improved biomass pyrolytic oil

A biomass pyrolysis oil and emulsification system technology, applied in the field of biomass energy utilization, can solve the problems of reducing the upgrading efficiency, deactivating the catalyst, increasing the risk, etc. High phenolic content and the effect of avoiding carbon deposition

Active Publication Date: 2022-01-04
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Not only does it increase the cost of equipment operation and the risk of process operation, but also due to the characteristics of biomass pyrolysis oil that is easy to coke when heated, it is easy to form carbon deposits and cause problems such as pipeline blockage or catalyst deactivation, thereby greatly reducing the upgrading efficiency and even making the reaction difficult. Ongoing

Method used

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  • Method for preparing quality-improved biomass pyrolytic oil based on emulsification system electro-catalysis and obtained quality-improved biomass pyrolytic oil
  • Method for preparing quality-improved biomass pyrolytic oil based on emulsification system electro-catalysis and obtained quality-improved biomass pyrolytic oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (a) Use 30g of ground rice powder to rapidly pyrolyze biomass at 700°C with a heating rate of 200°C / s to obtain biomass pyrolysis oil. Combine the collected biomass pyrolysis oil with 50mmol / L sodium chloride The solution was ultrasonically mixed for 5 minutes, and the prepared oil-water mixture was allowed to stand at room temperature for 5 hours;

[0047] (b) using the Hummers method to oxidize and modify natural graphite to prepare graphene oxide;

[0048] (c) using chemical impregnation method to load platinum on graphene oxide to obtain the required catalyst, the load is 1wt.%;

[0049] (d) Ultrasonic emulsification of 10 g of oil-water mixture with 0.2 g of catalyst for 10 min to prepare an emulsion with uniformly dispersed droplets;

[0050] (e) Take 20mL of the emulsion in a continuous flow electrolysis cell, control the current at 200mA, and perform electrolysis for 0.5h to obtain the upgraded biomass pyrolysis oil.

[0051] Table 1 shows the change in propor...

Embodiment 2

[0057] (a) Use 30g of ground rice powder to rapidly pyrolyze biomass at 800°C with a heating rate of 150°C / s to obtain biomass pyrolysis oil. Combine the collected biomass pyrolysis oil with 40mmol / L potassium chloride The solution was ultrasonically mixed for 4 minutes, and the prepared oil-water mixture was allowed to stand at room temperature for 4 hours;

[0058] (b) using the Hummers method to oxidize and modify natural graphite to prepare graphene oxide;

[0059] (c) using a sol-gel method to load ruthenium on graphene oxide to obtain the required catalyst, and the loading amount is 1wt.%;

[0060] (d) Ultrasonic emulsification of 10 g of oil-water mixture with 0.01 g of catalyst for 9 min to prepare an emulsion with uniformly dispersed droplets;

[0061] (e) Take 20mL of the emulsion in an undivided electrolytic cell, control the current at 150mA, and electrolyze for 1h to obtain the upgraded biomass pyrolysis oil.

Embodiment 3

[0063] (a) Use 30g of ground soybean shell powder to rapidly pyrolyze biomass pyrolysis oil at 500°C with a heating rate of 100°C / s to obtain biomass pyrolysis oil, and combine the collected biomass pyrolysis oil with 30mmol / L chlorinated The lithium solution was ultrasonically mixed for 3 minutes, and the prepared oil-water mixture was allowed to stand at room temperature for 3 hours;

[0064] (b) using the Brodie method to oxidize and modify natural graphite to prepare graphene oxide;

[0065] (c) palladium is supported on graphene oxide by vapor deposition method to obtain the required catalyst, and the loading capacity is 1wt.%;

[0066] (d) Ultrasonic emulsification of 10 g of oil-water mixture with 1 g of catalyst for 8 min to prepare an emulsion with uniformly dispersed droplets;

[0067] (e) Take 20mL of the emulsion in a continuous flow electrolysis cell, control the current at 100mA, and perform electrolysis for 1.5h to obtain the upgraded biomass pyrolysis oil.

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Abstract

The invention belongs to the related technical field of biomass energy utilization, and particularly relates to a method for preparing quality-improved biomass pyrolytic oil based on emulsification system electro-catalysis and the obtained quality-improved biomass pyrolytic oil. The method comprises the following steps: 1) preparing an oil-water mixed solution of biomass pyrolytic oil and an electrolyte aqueous solution, and standing and storing at normal temperature; 2) preparing a catalyst which is noble metal-loaded graphene oxide; (3) mixing the oil-water mixed solution obtained in the step (1) with the noble metal-loaded graphene oxide obtained in the step (2), and preparing a homogeneous emulsion; and 4) taking the homogeneous emulsion obtained in the step 3) as an electrolyte, and introducing current into the electrolyte in an electrolytic tank to carry out an electro-catalytic reaction so as to prepare the upgraded biomass pyrolytic oil. According to the method, the saturated biomass pyrolysis oil can be prepared, the oxygen content and the heavy component content in the biomass pyrolysis oil are reduced, and carbon deposition in the electro-catalysis process is avoided.

Description

technical field [0001] The invention belongs to the technical field related to biomass energy utilization, and specifically relates to a method for preparing upgraded biomass pyrolysis oil based on electrocatalysis of an emulsification system and the obtained upgraded biomass pyrolysis oil. Background technique [0002] my country is rich in available agricultural and forestry biomass resources, but because agricultural and forestry wastes are difficult to collect, store and transport, nearly 200 million tons of agricultural and forestry wastes are burned in open air or discarded on the spot every year, causing serious waste of resources and environmental pollution. Biomass energy distributed utilization technology centered on "gas, charcoal, and oil" pyrolysis polygeneration is an important way to solve the above problems, but biomass pyrolysis oil has complex components, high oxygen content, and low calorific value. , high acidity, poor chemical stability and other problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/00B01J23/42B01J23/44B01J23/46B01J23/52B01J23/755
CPCC11C3/00B01J23/42B01J23/462B01J23/52B01J23/44B01J23/755Y02E50/10
Inventor 汪一熊依旻江龙汪雪棚杜宽熊哲徐俊苏胜胡松向军
Owner HUAZHONG UNIV OF SCI & TECH
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