Quantum Physisorption of Methane and Carbon Dioxide within Nanoporous Materials

TL;DR

This paper reveals that quantum effects significantly influence methane and carbon dioxide gas physisorption in nanoporous materials, leading to a new quantum-based understanding and predictive model of the process.

Contribution

It introduces a quantum mechanics-based physisorption equation that explains the behavior of gases in nanopores, highlighting energy level transitions and spatial distribution effects.

Findings

Quantum effects dominate gas physisorption in nanopores.

Energy level transitions trigger physisorption.

Gas molecule distribution is affected by temperature, pressure, and potential energy.

Abstract

Although numerous investigations reveal the gas physisorption characteristics of porous materials and a variety of theories have also established to describe gas physisorption during the past century, the essence of physisorption behavior of gas within nanoscale space is still indistinct. We find that the physisorption behavior of complex molecular system of methane and carbon dioxide within nanoporous materials exhibits a quantum effect. Based on this quantum effect, we established a physisorption equation from the perspective of quantum mechanics to re-understand the basic principles of gas physisorption within nanopores. Energy level transition triggers gas physisorption, and non-uniform spatial distribution of energy-quantized molecules within nanopores dominates the gas physisorption behavior. The spatial distribution of gas molecules can be adjusted by temperature, pressure and potential energy field. This result contributes to understand and predict the physisorption behavior of CH4 and CO2 within nanoporous materials.