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首页> 外文期刊>Fuel Processing Technology >Chemical looping with oxygen uncoupling (CLOU) and chemical looping combustion (CLC) using copper-enriched oxygen carriers supported on fly ash
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Chemical looping with oxygen uncoupling (CLOU) and chemical looping combustion (CLC) using copper-enriched oxygen carriers supported on fly ash

机译：使用富含铜氧载体的氧气脱象（CLOU）和化学循环燃烧（CLC）的化学循环

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AbstractAn experimental investigation on chemical activity and stability of innovative CuO-based oxygen carriers (OC) supported on coal fly ash, towards Chemical Looping Combustion (CLC) and Chemical Looping Oxygen Uncoupling (CLOU) is presented. The materials were prepared by granulation of fine powders of CuO and fly ash (FA), with 40–60–80wt% CuO loading (Cu40FA, Cu60FA and Cu80FA), using a high shear granulator. CLC and CLOU activities were investigated in a thermogravimetric analyzer (TGA) in the presence of a reactive fuel or an inert atmosphere, respectively. A rather stable CLOU capacity (Ro-CLOU) in the range of 4–8g O2/100g OC was found over 42 redox cycles, in agreement with the stoichiometry of the prepared samples. CLC oxygen carrying capacity (Ro-CLC) with gaseous fuel, on the other hand, has evidenced a quick decline for the material with higher copper loading (80wt% CuO). Furthermore, both oxygen carriers with 40–60wt% CuO were tested for combustion of coal in a macro-TGA rig using CO2as carrier gas and different OC:fuel ratios. First, a blank test in the absence of the OC was carried out to characterize the fast devolatilization and slow gasification reactions taking place due to the exposure of the fuel to high temperature and CO2-rich atmosphere. The comparison of the weight loss curve evolution with and without oxygen carrier, and the measured residual carbon after test, enabled to extract the CLOU effect for each combination of material/solid fuel.Highlights?Fly ash was used as support for preparing innovative copper-based oxygen carrier?Both CLOU and CLC multicycling activities were investigated in a TGA?High oxygen transfer efficiency and no copper-support interactions were detected?Deactivation occurred at high copper loading (80wt%) and deep copper reduction?The oxygen carriers were active for macro-TGA CLOU tests in presence of coal]]>
机译：<！[cdata [ 抽象 煤粉煤灰支持的基于Cuo的氧气载体（OC）的化学活性和稳定性的实验研究，朝向化学环路燃烧（CLC）和化学环氧剥离（CLOU）。使用高剪切造粒机，通过CuO和飞灰（Fa）的细粉（Fa）的细粉（Fa）的细粉状制备材料制备材料。在热量分析仪（TGA）中分别在反应性燃料或惰性气氛存在下进行CLC和CLOU活性。一个相当稳定的clou容量（r O-clou ）范围内为4-8g o 2 / 100g oc发现超过42个氧化还原循环，同时与制备样品的化学计量相一致。另一方面，具有气体燃料的CLC氧携带能力（R O-CLC ），已经证明了铜负荷较高的材料的快速下降（80wt％ cuo）。此外，使用CO 2 作为载体气体和不同OC：燃料，测试煤中煤中煤中的氧气载体燃烧煤中的燃煤。比率。首先，在没有OC的情况下进行空白测试，以表征由于燃料暴露于高温和CO 2 -RICH氛围。在没有氧载体的体重减轻曲线演化的比较和测试后测量的残留碳，使得提取围绕材料/固体燃料的各组合的围绕作用。 突出显示 < CE：Abstract-Sec ID =“AS0010”View =“全部”> ？ 飞灰被用作准备创新的铜基氧载体 ？ 都CLOU和CLC多单体过程在TGA ？ 高氧转移效率，没有检测到铜支持相互作用 ？ 停用发生在高铜负载（80wt％）和深铜减少（深铜）中发生 ？ 氧气运营商为宏TGA clou是活动的在煤炭存在下测试 ]]>

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