Method for preparing liquid fuel through coliquefaction of coal and alage

A technology of liquid fuel and co-liquefaction, which is applied in the preparation of liquid hydrocarbon mixtures, petroleum industry, etc., can solve the problems of unsatisfactory bio-oil quality, low yield of liquid fuel oil, poor mass transfer and heat transfer effect, etc., and achieves good industrialization. Application prospect, unique performance, convenient operation effect

Inactive Publication Date: 2013-09-18
TSINGHUA UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, hydrothermal liquefaction also has many disadvantages: (1) The yield of liquid fuel oil is low; (2) The quality of bio-oil is not ideal, due to the oxidation of sub / supercritical water, the partially liquefied small molecules are oxidized Organic acids, which make bio-oils corrosive
However, this patent has two shortcomings: (1) The reaction temperature is 390~450°C, the temperature required for the reaction is too high, the requirements for equipment are harsh, and the energy consumption is large, resulting in a great increase in investment costs; (2) The use of halides catalyst, or metal oxide, or liquid catalyst
Solid catalysts are in a heterogeneous mixed state with liquid solvents, so the mass and heat transfer effects are poor; although liquid catalysts solve this problem, they are not easy to recycle, resulting in waste of resources and environmental pollution

Method used

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  • Method for preparing liquid fuel through coliquefaction of coal and alage

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the solid-liquid ratio of 1:10 (g / mL), 4.00 g of sample (Dunaliella salina was selected as algae, accounting for 50 wt.%, lignite as coal) and 40 mL of water-methanol mixture were added to the reaction kettle. The volume percentage of methanol in the water-alcohol mixture medium is 60%, the liquefaction temperature is 340°C, the pressure is 29.00MPa, and the reaction time is 30min. The liquefaction rate of the obtained coal and algae is 63.00%, and the oil production rate is 30.92%.

Embodiment 2

[0027] Weigh 6.00g of sample according to the ratio of solid to liquid 1.5:10 (g / mL) (select spirulina for algae, the percentage is 50 wt.%, choose lignite for coal) and add 40mL of water-isopropanol mixture into the reaction kettle , the volume percentage of isopropanol in the water-alcohol mixture medium is 40%, the liquefaction temperature is 320°C; the pressure is 26.00MPa; the reaction time is 30min, the liquefaction rate of the obtained coal and algae is 63.01%, and the oil production rate is 25.93%.

Embodiment 3

[0029]According to the solid-liquid ratio of 1:10 (g / mL), 4.00 g of sample (Dunaliella salina was selected as algae, accounting for 50 wt.%, lignite as coal) and 40 mL of water-methanol mixture were added to the reaction kettle. The volume percentage of methanol in the water-alcohol mixture medium is 60%, the liquefaction temperature is 360°C, the pressure is 39.00MPa, and the reaction time is 90min. The liquefaction rate of the obtained coal and algae is 70.82%, and the oil production rate is 38.19%.

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Abstract

The invention discloses a method for preparing a liquid fuel through coliquefaction of coal and algae under a subcritical/overcritical water-alcohol condition, and belongs to the technical field of energy and chemical industry. The method is characterized in that the coal and algae are coliquefied in a subcritical/overcritical water-alcohol cosolvent, the product is extracted through an organic solvent and then processed by solid-liquid separation and organic-phase-water separation, and finally the organic phase is concentrated to obtain the liquid fuel. The method has the advantages that the technical process is simple and easy to control; by addition of alcohol in a subcritical/overcritical system, the whole process is environmentally friendly; the critical point required by the reaction system is reduced, equipment investment cost is reduced, the safety of the process is improved, and the quality of the liquid fuel is improved through an oxygen supply mechanism. The method combines thermochemical means and overcritical technology, provides foundation and scientific basis for gaining renewable energy sources and easing the pressure on environment and other problems, and has a wide application prospect and market demand.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical industry, and in particular relates to a method for preparing liquid fuel by co-liquefaction of coal and algae under sub / supercritical water-alcohol conditions. Background technique [0002] With the increase in energy demand and a series of problems such as environmental pollution caused by the use of fossil energy, countries have begun to expand the development and efficient use of energy. Coal is the most abundant and widely distributed fossil fuel in the world, and plays a pivotal role in the existing energy structure. my country's energy resources are rich in coal and poor in oil, and the energy structure dominated by coal will not change in the next 50 years. Since 1980, the proportion of coal in my country's total primary energy consumption has been stable at around 75%. At present, how to fully and effectively utilize coal resources has become a focus of attention and researc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/06
Inventor 吴玉龙杨瑞丽陈宇杨明德陈镇胡湖生刘吉
Owner TSINGHUA UNIV
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