METAL ORGANIC FRAMEWORK BASED MIXED MATEIX MEMBRANE FOR NATURE GAS UPGRADING

摘要

Gas separation processes are ubiquitous in the energy and petrochemical industries. As a prime example, CO2 removal from natural gas accounts for the largest industrial gas separation process. The conventional CO2 removal method, which relies on cryogenic distillation and reversible absorption, such as amine scrubbing, is energy intensive and poses serious environmental concerns. Since the 80's, polymeric membranes have rapidly become a competitive alternative gas separation technology. The advantages of membrane over traditional gas separation methods include decreasing production costs and equipment size, low-energy consumption, ease of operation and limited environmental impact, supposing an innovative process intensification strategy. However, current commercial polymeric membranes allow for a combination of gas permeabilities and separation selectivities which are still suboptimal to effectively process large volumes of gas. In addition, they display insufficient thermal and chemical stability and are susceptible to the so-called plasticization phenomenon.