2026-05-15 2026, Volume 20 Issue 5

  • Select all
  • REVIEW ARTICLE
    Shuaijun Fan, Jun Jia, Jialin Chen, Wentong Chen, Jingxiang Ma, Shuangchen Ma

    The inorganic ammonia carbon capture and co-production of ammonium fertilizer provides a good idea for low carbon production in coal-fired power plants. The integration of capture and utilization is expected to solve the problems of high energy consumption, high operating cost, and difficult utilization. In this paper, theories, product transformation, and application of the inorganic ammonia carbon capture are discussed, and the problems, such as low efficiency and serious NH3 escape are summarized. The mass transfer kinetics is the common method to solve the above problems. Therefore, this paper summarizes the mass transfer kinetics model from three progressive levels, and focuses on the ‘mass transfer + reaction kinetics with the features of inorganic ammonia carbon capture’ theories and research methods of CO2 absorption and NH3 escape/absorption. Further, the relationship between the model and the design of the inorganic ammonia carbon capture system is established. The prediction of flux has been put forward based on the theory and research method of mass transfer kinetics model. The way of screening inhibitors or absorbents is proposed based on two principles of inhibiting NH3 escape. Finally, the challenges and prospects of the inorganic ammonia carbon capture are mentioned, and the future trend of power plant centered on NH3 is discussed.

  • RESEARCH ARTICLE
    Junjie Liu, Bingqian Kang, Xinyi Zhao, Yingzhou Lu, Hongwei Fan

    Covalent organic framework (COF) membranes are promising for water treatment applications owing to their uniform pores and outstanding chemical stability. However, the harsh conditions and low synthetic efficiency of conventional solvothermal synthesis of COF membranes have severely hindered their practical development. Herein, we developed a dynamic interfacial polymerization strategy to rapidly construct a TpPa-1 selective layer on a polyacrylonitrile substrate within only 3 min. This method enabled the rapid and efficient fabrication of COF membranes by confining the reaction region to shorten the diffusion path of the monomers while exploiting the intrinsic high reactivity of TpPa-1 monomers. The rapid fabrication resulted in a thinner selective layer and enhanced permeance performance. In the methyl blue/Na2SO4 nanofiltration test, the separation factor reached 212, with a permeance of 865 L∙m–2∙h–1∙MPa–1, outperforming most previously reported COF membranes.

  • VIEWS & COMMENTS
    Feng Yu
  • RESEARCH ARTICLE
    Kai Wang, Yingjie Wang, Quanfang Li, Jiayou Ding

    As an unconventional hydrocarbon resource integrating coal, oil, and gas properties, tar-rich coal holds promise for advancing green and low-carbon utilization in the coal industry. The thermogravimetry and differential scanning calorimetry with different heating rates were employed to identify the combustion characteristics and oxidation reaction kinetics of coals. The research finds that the lower thermal thresholds accelerate tar-rich coal’s transition to ignition. At low heating rates, pyrolysis dominates tar-rich coal mass loss, the average activation energy for the pyrolysis of tar-rich coal exceeds that for tar-inclusive coal by more than 22.2 kJ∙mol–1. During the entire exothermic process, the E value of tar-rich coal in the thermal decomposition stage is 15 kJ∙mol–1 higher than that of tar-inclusive coal. In the combustion stage, the activation energy of tar-rich coal is 5 kJ∙mol–1 lower than that of tar-inclusive coal. This indicates that the hydrogen-rich structure makes its decomposition process have a higher activation energy, and the small molecules produced during the decomposition enable tar-rich coal to enter the combustion stage more quickly and efficiently. It provided a certain basis for the in situ thermal decomposition mining of tar-rich coal, ultimately facilitating the safe and sustainable utilization of this hybrid energy resource.