Research Progress in Microporous Materials for Selective Adsorption and Separation of Methane from Low-Grade Gas.

Given that methane (CH) and nitrogen (N) have similar properties, achieving high-purity enrichment of CH from nitrogen-rich low-grade gas is extremely challenging and is of great significance for sustainable development in energy and the environment. This paper reviews the research progress on carbon-based materials, zeolites, and MOFs as adsorbent materials for CH/N separation. It focuses on the relationship between the composition, pore size, surface chemistry of the adsorbents, CH/N selectivity, and CH adsorption capacity.

Partition-Based Solutions of Static Logical Networks With Applications.

Given a static logical network, partition-based solutions are investigated. Easily verifiable necessary and sufficient conditions are obtained, and the corresponding formulas are presented to provide all types of the partition-based solutions. Then, the results are extended to mix-valued logical networks.