Preparation of aluminum fumarate microsphere (mAlFu) adsorbent and its CO2 adsorption characteristic

CO2 emissions are the main cause of global climate change and reducing CO2 emissions is being a global consensus. Porous materials，which with higher CO2 adsorption capacity，higher capture efficiency and lower regeneration energy consumption，are considered an effective method to replace the liquid ammonia method for CO2 capture. It is the key to develop porous materials with the chemically stable，high CO2 adsorption capacity and low-cost in the application of porous materials. Aluminum fumarate (AlFu) adsorbent has shown a great application potential in gas separation owing to high specific-surface area and gas adsorption capacity. In present work，in order to simplify the synthesis steps of aluminium fumarate，disodium fumarate as the linker and aluminium nitrate as the metal source were used to synthesis microsphere-like Al-Fumarate MOF (mAlFu) at room temperature CO2 adsorption. The as-synthesized material was characterized by the Scan Electron Microscopy (SEM)，X-ray diffraction (XRD)，Fourier transform infrared spectroscopy (FT-IR)，all the results showed that the synthesized product was mAlFu adsorbent. Thermo gravimetric analysis (TGA) showed that the decomposition temperature of the mAlFu sorbents was 400 ℃，which had high thermal stability. The pore size analysis showed that mAlFu adsorbent had abundant pores. At the same time，the CO2 adsorption performance of mAlFu was investigated，the CO2 uptake of mAlFu was 2.21 mmol/g at 303 K，0.1 MPa. The constructed conformation of mAlFu was used to compute the CO2 adsorption of mAlFu based on the Monte Carlo (GCMC) method. By comparing the experimental and calculated values，the results show that the method of calculating parameters could be used to predict the gas adsorption of mAlFu. Meanwhile，the CO2 selectivity of mAlFu adsorbent was obtained in flue gas，which value was 14. The CO2 cylic regeneration performance of mAlFu had showed the CO2 adsorption capacity remained stable，indicating the sorbents had great potential for CO2 capture.