Riser-Based Carbon Stripper for Coal-Fueled Chemical Looping Combustion
Riser-Based Carbon Stripper for Coal-Fueled Chemical Looping Combustion
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用于燃煤化学循环燃烧的立管式碳剥离器
DOI：
10.1021/acs.iecr.5b03970
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发表时间：
2016
影响因子：
4.2
通讯作者：
Cai Ningsheng
中科院分区：
文献类型：
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作者：
Sun Hongming;Cheng Mao;Li Zhenshan;Cai Ningsheng
碳剥离是防止炭粒进入空气反应堆的关键。在这项研究中，提出了一种基于提升管的碳汽提塔，用于分离较轻的炭粒和较重的氧气载体粒子。实验研究了基于提升管的碳汽提塔在分离塑料颗粒和钛铁矿颗粒方面的性能，其中塑料颗粒被用来模拟炭粒的行为。考察了气速和固体循环速度对分离特性的影响。结果表明，可携带2-63wt%的混合物，含17-100wt%的塑料微珠。从钛铁矿颗粒中分离塑料微珠的适宜气速范围为2~2.25m/S，适宜的进料速度为23.7 kg/m2·S。功率成本分析表明，在使用要求较长时间的固体燃料时，基于提升管的碳汽提塔在提高二氧化碳捕集效率方面比大型燃料反应堆策略更有效。
Carbon stripping is critical to preventing char particles from reaching air reactors. In this study, a riser-based carbon stripper is proposed to separate the lighter char particles from the heavier oxygen carrier particles. The performance of the proposed riser-based carbon stripper in the separation of plastic beads from ilmenite particles was experimentally investigated, where plastic beads were used to simulate the behavior of char particles. The effects of gas velocity and solids circulation rate on the separation characteristics were studied. The results showed that 2–63 wt % mixtures can be entrained, containing 17–100 wt % plastic beads. An appropriate gas velocity range for separating plastic beads from ilmenite particles is 2–2.25 m/s. The appropriate mixture feeding rate is below 23.7 kg/m2·s. The power cost analysis shows that the riser-based carbon stripper is more efficient than the larger fuel reactor strategy in increasing CO2 capture efficiency when using solid fuels that require long res...