A method for preparing carbon microspheres from lignocellulose
A technology of lignocellulose and microspheres, which is applied in the preparation/purification of carbon, nano-carbon, etc., can solve the problems of increasing the complexity of the system process and increasing the production cost, and achieve low hydrothermal reaction intensity, controllable size, and process simple effect
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Embodiment 1
[0019] Step 1: Crush corn stalks to a size of 1 cm, mix with tap water, and the solid-to-liquid ratio is 1:10.
[0020] Step 2: Add the mixture of corn stalks and water into a stirrable high-temperature water reactor. The temperature of the reactor is controlled at 160°C, the reaction time is 20 minutes, and the stirring speed is 100 rpm. After the reaction, the condensed water is cooled or Naturally cool to room temperature.
[0021] Step 3: The reaction product obtained in step 2 is separated from solid and liquid through a filter cloth, and the liquid phase is collected by centrifugation (7000rpm×10min), and then washed with deionized water to obtain carbon microspheres with good dispersibility. The SEM picture is as follows figure 1 As shown, its average particle size is about 200nm.
Embodiment 2
[0023] Step 1: Crush wheat straw to a size of 0.1 cm, mix with deionized water, and the solid-to-liquid ratio is 1:20.
[0024] Step 2: Add the mixture of wheat straw and water into a stirrable high-temperature water reactor. The temperature of the reactor is controlled at 190°C, the reaction time is 5 minutes, and the stirring speed is 100 rpm. After the reaction is completed, the condensed water is cooled or Naturally cool to room temperature.
[0025] Step 3: The reaction product obtained in step 2 is separated from solid and liquid through a filter cloth, and the liquid phase is collected by centrifugation (7000rpm×10min), and then washed with deionized water to obtain carbon microspheres with good dispersibility. The average particle size is about 600nm.
Embodiment 3
[0027] Step 1: Crush poplar wood to a size of 0.1 cm, mix with tap water, and the solid-to-liquid ratio is 1:20.
[0028] Step 2: Add the mixture of poplar wood and water into a stirrable high-temperature water reactor. The temperature of the reactor is controlled at 180°C, the reaction time is 30 minutes, and the stirring speed is 80 rpm. After the reaction is completed, the condensed water is cooled or Naturally cool to room temperature.
[0029] Step 3: The reaction product obtained in step 2 is subjected to solid-liquid separation through a filter cloth, and the liquid phase is collected by centrifugation, and then washed with deionized water to obtain carbon microspheres with good dispersibility. The SEM picture is as follows figure 2 As shown, its average particle size is 800nm.
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