Qasim Muhammad, Ayoub Muhammad, Aqsha Aqsha, Ghazali Nur Adibah, Ullah Sami, Ando Yoshito, Farrukh Sarah
HiCoE, Centre for Biofuel and Biochemical Research (CBBR), Institute of Self-Sustainable Building (ISB), Universiti Teknologi PETRONAS, 32610Bandar Seri Iskandar, Perak, Malaysia.
Department of Chemical Engineering, Universiti Teknologi PETRONAS, 32610Bandar Seri Iskandar, Perak, Malaysia.
ACS Omega. 2022 Nov 1;7(45):40789-40798. doi: 10.1021/acsomega.2c02993. eCollection 2022 Nov 15.
CO levels in the atmosphere are growing as a result of the burning of fossil fuels to meet energy demands. The introduction of chemical looping combustion (CLC) as an alternative to traditional combustion by transporting oxygen emphasizes the need to develop greener and more economical energy systems. Metal oxide, also defined as an oxygen carrier (OC), transports oxygen from the air to the fuel. Several attempts are being made to develop an OC with a reasonable material cost for superior fuel conversion and high oxygen transport capacity (OTC). This study aims to synthesize a potential OC using the wet impregnation method for the CLC process. Thermogravimetric analysis (TGA) was used to determine the cyclic redox properties using 5% CH/N and air as reducing and oxidizing gases, respectively. The 10CuPA-based OC retained a high OTC of about 0.0267 mg O/mg of OC for 10 cycles that was higher than 10CuA-based OC. Furthermore, the oxygen transfer rate for 10CuPA-based OC was relatively higher compared to 10CuA-based OC over 10 cycles. In comparison to 10CuA-based OC, the 10CuPA-based OC presented a steady X-ray diffraction (XRD) pattern after 10 redox cycles, implying that the phase was stably restored due to praseodymium-modified γ alumina support.
由于燃烧化石燃料以满足能源需求，大气中的一氧化碳（CO）含量正在增加。引入化学链燃烧（CLC）作为通过输送氧气替代传统燃烧的方法，凸显了开发更绿色、更经济的能源系统的必要性。金属氧化物，也被定义为氧载体（OC），将空气中的氧气输送到燃料中。人们正在进行多项尝试，以开发一种具有合理材料成本、卓越燃料转化率和高氧传输能力（OTC）的氧载体。本研究旨在采用湿浸渍法合成一种用于化学链燃烧过程的潜在氧载体。热重分析（TGA）用于分别以5% CH₄/N₂和空气作为还原气体和氧化气体来测定循环氧化还原特性。基于10CuPA的氧载体在10个循环中保持了约0.0267 mg O/mg氧载体的高氧传输能力，高于基于10CuA的氧载体。此外，在10个循环中，基于10CuPA的氧载体的氧转移速率相对于基于10CuA的氧载体相对更高。与基于10CuA的氧载体相比，基于10CuPA的氧载体在10次氧化还原循环后呈现出稳定的X射线衍射（XRD）图谱，这意味着由于镨改性的γ氧化铝载体，相得以稳定恢复。
