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Super-microporous active carbon material, preparation method thereof and application of super-microporous active carbon material in separation of light hydrocarbon compounds

An ultra-microporous, activated carbon technology, applied in the direction of carbon compounds, alkali metal compounds, adsorption purification/separation, etc., can solve the problem of poor separation selectivity of light hydrocarbon compounds, and achieve the improvement of selective adsorption capacity, simple operation, and equipment requirements. low effect

Pending Publication Date: 2022-06-17
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a class of ultra-microporous activated carbon materials (C-CTS series) and its preparation meth

Method used

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  • Super-microporous active carbon material, preparation method thereof and application of super-microporous active carbon material in separation of light hydrocarbon compounds
  • Super-microporous active carbon material, preparation method thereof and application of super-microporous active carbon material in separation of light hydrocarbon compounds
  • Super-microporous active carbon material, preparation method thereof and application of super-microporous active carbon material in separation of light hydrocarbon compounds

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035]实施例1

[0036]超微孔碳材料的制备方法和轻烃化合物分离应用，具体为：将2g壳聚糖放置于管式炉中，在氩气(Ar)氛围里500℃预碳化1小时，其中氩气流速为200mL min–1；将预碳化好的壳聚糖碳材料和造孔剂KOH按照1:2的质量比进行混匀，将其放置于研钵中，研磨30-60分钟制得致密粉末(研磨中观察粉末状态，当无肉眼可见颗粒时即可停止研磨)，然后将其放置于管式炉中，在氩气(Ar)氛围里600℃碳化1小时，其中氩气流速为300mL min–1，待降至室温后，将得到的碳化物进行研磨约30-60分钟(之所以时间为区间范围，是因为在研磨时需要观察粉末状态，当无肉眼可见颗粒时即可停止研磨)，然后加入大量的去离子水进行加热搅拌，温度为85℃，时间为12h，其中配置1M的HCl溶液对其洗涤直至调节pH值至7；过滤洗涤后将得到的碳材料在100℃真空烘箱中干燥24小时，然后在室温下放置2h，可得到活化的C-CTS-2以用于下一步气体的吸附分离实验。

[0037]图1是实施例1制备得到C-CTS-2的SEM图；

[0038]图2是实施例1制备得到的C-CTS-2的粉末X射线衍射图，可以看到所有样品在2θ≈23.8°和45°出现了两个相似的宽峰，对应于非晶态石墨碳的衍射峰；23.8°处的宽峰对应(002)衍射面，45°处的宽峰对应(100)衍射面，除碳峰外没有其他衍射峰，说明水热酸洗完全去除了K+和Cl-离子。

[0039]图3是实施例1制备得到的C-CTS-2的77K N2吸附等温线图，可以看到其BET高达2906m2 / g。

[0040]图4是实施例1制备得到的C-CTS-2对C2H6的吸附等温线，可以看到，在298K下对C2H6的最大吸附量可达165.51cm3 / g。

[0041]图5是实施例1制备得到的C-CTS-2对C2H4的吸附曲线，可以看出最大吸附量为124.92cm3 / g，低于对C2H6的吸附量，可以实现反转吸附。

Example Embodiment

[0042]实施例2

[0043]超微孔碳材料的制备方法和轻烃化合物分离应用，具体为：将2g的壳聚糖放置于管式炉中，在氩气(Ar)氛围里500℃预碳化1小时，其中氩气流速为200mL min–1；将预碳化好的壳聚糖碳材料和造孔剂KOH按照1:1的质量比进行混匀，将其放置于研钵中，研磨30-60分钟制得致密粉末(研磨时观察粉末状态，当无肉眼可见颗粒时即可停止研磨)，然后将其放置于管式炉中，在氩气(Ar)氛围里500℃碳化1小时，其中氩气流速为300mL min–1，待降至室温后，将得到的碳化物进行研磨约40-60分钟，然后加入大量的去离子水进行加热搅拌，温度为85℃，时间为12h，其中配置1M的HCl溶液对其洗涤直至调节pH值至7；过滤洗涤后将得到的碳材料在100℃真空烘箱中干燥24小时，再在室温下放置2h，可得到活化的C-CTS-1以用于下一步气体的吸附分离实验。

Example Embodiment

[0044]实施例3

[0045]超微孔碳材料的制备方法和轻烃化合物分离应用，具体为：将2g的壳聚糖放置于管式炉中，在氩气(Ar)氛围里500℃预碳化1小时，其中氩气流速为200mL min–1；将预碳化好的壳聚糖碳材料和造孔剂NaOH按照1:4的质量比进行混匀，将其放置于研钵中，研磨30-60分钟制得致密粉末(研磨时观察粉末状态，当无肉眼可见颗粒时即可停止研磨)，然后将其放置于管式炉中，在氩气(Ar)氛围里700℃碳化1小时，其中氩气流速为300mL min–1，待降至室温后，将得到的碳化物进行研磨约40-60分钟，然后加入大量的去离子水进行加热搅拌，温度为85℃，时间为12h，其中配置1M的HCl溶液对其洗涤直至调节pH值至7；过滤洗涤后将得到的碳材料在100℃真空烘箱中干燥24小时，再在室温下放置2h，可得到活化的C-CTS-4以用于下一步气体的吸附分离实验。

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Abstract

The invention discloses an ultra-microporous activated carbon material, a preparation method thereof and application of the ultra-microporous activated carbon material in separation of light hydrocarbon compounds, and belongs to the technical field of separation of light hydrocarbon compounds of activated carbon materials. Chitosan is selected as a carbon source, the chitosan serving as the carbon source is a natural biopolymer, is wide in source and contains rich hydroxyl and amino functional groups, and favorable conditions are provided for carbonization of the chitosan to be applied to adsorption separation of light hydrocarbons; kOH is selected as a pore-forming agent, chitosan is subjected to pre-carbonization treatment, then the pore-forming agent is added, complete carbonization treatment is performed, and a series of ultra-microporous carbon materials with high-quality light hydrocarbon compound separation performance are creatively synthesized. The method is simple to operate, low in equipment requirement and suitable for industrial large-scale production.

Description

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Claims

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Application Information

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IPC IPC(8): C01B32/318C01B32/348B01J20/20B01J20/28B01J20/30C07C7/12C07C9/02C07C11/02C07C11/24B01D53/02
CPCC01B32/318C01B32/348B01J20/20B01J20/28066B01J20/2808B01D53/02C07C7/12C01P2002/72C01P2004/03B01D2253/102C07C9/02C07C11/02C07C11/24
Inventor 杨庆远穆玄童
Owner XI AN JIAOTONG UNIV