Scholarlink

<p>C<sub>2</sub>H<sub>4</sub> and CH<sub>4</sub> are essential for industrial applications. However, contamination with other natural gases is a challenge to their utilization. Although several sorbents have been investigated, their performance remains limited. This study introduces graphene-inspired, PPN-20, a porous polymer network (PPN) capable of separating C<sub>2</sub>H<sub>6</sub>/C<sub>2</sub>H<sub>4</sub> and purifying CH<sub>4</sub> from a C<sub>3</sub>H<sub>8</sub>/C<sub>2</sub>H<sub>6</sub>/CH<sub>4</sub> mixture in a single step. The ultra-microporosity of PPN-20 enables preferential C-H···π interactions with C<sub>2</sub>H<sub>6</sub> and C<sub>3</sub>H<sub>8</sub>. As a result, PPN-20 exhibits a C<sub>2</sub>H<sub>6</sub> and C<sub>3</sub>H<sub>8</sub> uptake of 3.93 mmol/g and 5.98 mmol/g, respectively, at 298 K and 1 bar, representing the highest reported for any PPN. It achieves ideal adsorbed solution theory (IAST) selectivities of 2.2 for C<sub>2</sub>H<sub>6</sub>/C<sub>2</sub>H<sub>4</sub>, 368.2 for C<sub>2</sub>H<sub>6</sub>/CH<sub>4</sub>, 40.14 for C<sub>3</sub>H<sub>8</sub>/C<sub>2</sub>H<sub>6</sub>, and 294,336 for C<sub>3</sub>H<sub>8</sub>/CH<sub>4</sub>. This selectivity, to the best of our knowledge, is the highest reported for any PPN in the case of C<sub>2</sub>H<sub>6</sub>/C<sub>2</sub>H<sub>4</sub> separation and for any sorbent in the cases of C<sub>2</sub>H<sub>6</sub>/CH<sub>4</sub>, C<sub>3</sub>H<sub>8</sub>/C<sub>2</sub>H<sub>6</sub>, and C<sub>3</sub>H<sub>8</sub>/CH<sub>4</sub> separation. Robustness tests, including breakthrough experiments, IAST calculations, etc., demonstrate the reliability of PPN-20. Its exceptional performance is attributed to precisely engineered pore sizes that enhance the trapping of guest molecules. These results will pave the way for the design of PPNs for short-chain hydrocarbon purification.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Graphene-inspired porous polymer network for ethane/ethylene separation and methane purification

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月27日

查看全文
  • Kelechi Festus,
  • Fuan Guo,
  • Saif Ullah,
  • Sayan Maiti,
  • Ankit Mondal,
  • Vladimir Bakhmutov,
  • Urme Podder,
  • Aishi Sikdar,
  • Roknuzzaman Roknuzzaman,
  • Hengyu Lin,
  • Lei Fang,
  • Shengqian Ma,
  • Timo Thonhauser,
  • Hao Wang,
  • Qingsheng Wang,
  • Hong-Cai Zhou

摘要

C2H4 and CH4 are essential for industrial applications. However, contamination with other natural gases is a challenge to their utilization. Although several sorbents have been investigated, their performance remains limited. This study introduces graphene-inspired, PPN-20, a porous polymer network (PPN) capable of separating C2H6/C2H4 and purifying CH4 from a C3H8/C2H6/CH4 mixture in a single step. The ultra-microporosity of PPN-20 enables preferential C-H···π interactions with C2H6 and C3H8. As a result, PPN-20 exhibits a C2H6 and C3H8 uptake of 3.93 mmol/g and 5.98 mmol/g, respectively, at 298 K and 1 bar, representing the highest reported for any PPN. It achieves ideal adsorbed solution theory (IAST) selectivities of 2.2 for C2H6/C2H4, 368.2 for C2H6/CH4, 40.14 for C3H8/C2H6, and 294,336 for C3H8/CH4. This selectivity, to the best of our knowledge, is the highest reported for any PPN in the case of C2H6/C2H4 separation and for any sorbent in the cases of C2H6/CH4, C3H8/C2H6, and C3H8/CH4 separation. Robustness tests, including breakthrough experiments, IAST calculations, etc., demonstrate the reliability of PPN-20. Its exceptional performance is attributed to precisely engineered pore sizes that enhance the trapping of guest molecules. These results will pave the way for the design of PPNs for short-chain hydrocarbon purification.