Synthesis of bimetallic–organic framework Cu/Co-BTC and the improved performance of thiophene adsorption. Issue 27 (20th May 2019)

• Record Type: Journal Article
• Authors: Tian, Fuping; Qiao, Chenxia; Zheng, Renyu; Ru, Qiaofeng; Sun, Xin; Zhang, Yifu; Meng, Changgong
• Is Part Of: RSC advances. Volume 9:Issue 27(2019)
• Page Start: 15642
• Page End: 15647
• Publication Date: 2019-05-20
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra02372k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The adsorbent Cu/Co-BTC-174 exhibited the largest breakthrough sulfur capacity, with an improvement by 30% in comparison to HKUST-1. Abstract : A bimetallic–organic porous material (Cu/Co-BTC) with a paddle-wheel structure has been successfully synthesized by a solvothermal approach. The as-synthesized materials were characterized by XRD, SEM, ICP-AES, UV-Vis, TGA and N2 adsorption at 77 K. The prepared Cu/Co-BTC samples were investigated in thiophene (TP) adsorption from model gasolines by the fixed bed adsorption method at 298 K. The results showed that only a small amount of Co could be successfully introduced into the framework of HKUST-1, and the introduction of Co had little effect on the crystalline structure, morphology, porosity, and thermal stability. The bimetallic Cu/Co-BTC with a Cu/Co ratio of 174 displayed significantly improved adsorption desulfurization performance, showing an increase in breakthrough volume by 30% compared with HKUST-1, implying that the central metal in the MOF plays an important role in adsorption desulfurization. The addition of toluene or cyclohexene (3.20–3.30 vol%) as a competitor in the model gasoline led to a decline in desulfurization performance, especially when cyclohexene was added. The bimetallic Cu/Co-BTC showed a slight loss in breakthrough volume by only 5% after regenerating 7 times, displaying an excellent regeneration property.