Microfibrous entrapment of Ni/Al2O3 for dry reforming of methane: Heat/mass transfer enhancement towards carbon resistance and conversion promotion
Microfibrous entrapment of Ni/Al2O3 for dry reforming of methane: Heat/mass transfer enhancement towards carbon resistance and conversion promotion
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用于甲烷干重整的 Ni/Al2O3 微纤维包埋：增强传热/传质以实现抗碳性和促进转化
DOI：
10.1016/j.ijhydene.2012.09.080
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发表时间：
2012-12
影响因子：
7.2
通讯作者：
Yong Lu
中科院分区：
文献类型：
--
作者：
Wei Chen;Wenqie Sheng;Fahai Cao;Yong Lu
为了验证新型微纤维包埋技术对甲烷干重整反应的过程强化效果，开发了一种8 μ m铜微纤维包埋Ni/Al 2 O3（Cu-MFE-Ni/AlO）复合催化剂。采用计算流体动力学（CFD）方法，研究了微纤维结构床在稳态工况下的传热强化效果。结果表明，当壁温为1073 K时，Cu-MFE-Ni/AlO的平均床温为1039 K，比Ni/AlO填充床（PB-Ni/AlO）的平均床温高75 K。结果表明，催化剂床层的抗积炭性能通过热力学方式沿着得到显著改善，转化率得到明显提高。例如，在1073 K的温度下，与PB-Ni/AlO相比，在Cu-MFE-Ni/AlO复合床中实现了超过4倍的平均碳沉积速率降低，而CH 4转化率从PB-Ni/AlO上的84%提高到我们的Cu-MFE-Ni/AlO复合床上的89%，气时空速（GHSV）为20，000 mL gcat-1h-1。此外，这种微纤维截留技术还提供了小催化剂粒度（0.15-0.18 mm）和具有大空隙体积（71.3体积%）的完全开放结构的独特组合，从而导致增强的传质和高渗透性（低压降）。
An 8-μm-copper microfibrous entrapped Ni/Al2O3(Cu-MFE-Ni/AlO) composite catalyst was developed for demonstrating the process intensification effectiveness of the novel microfibrous entrapment technology on dry reforming of methane (DRM), which is highly regarded for CH4utilizing and CO2chemical cycling. Computational fluid dynamics (CFD) calculation was employed to illustrate the significant enhancement of the heat transfer of the microfibrous structured bed at steady working state. The results indicated that the average bed temperature of Cu-MFE-Ni/AlO was 1039 K, 75 K higher than that of packed bed with Ni/AlO (PB-Ni/AlO), when the wall temperature was set at 1073 K. As a result, carbon resistance of the catalyst bed was significantly improved by a thermodynamic way along with visible conversion promotion. For instance, at temperature of 1073 K, more than 4-fold reduction of average carbon deposition rate was achieved in the Cu-MFE-Ni/AlO composite bed compared to the PB-Ni/AlO, while the CH4conversion was promoted from 84% on the PB-Ni/AlO to 89% on our Cu-MFE-Ni/AlO composite bed with a gas hourly space velocity (GHSV) of 20,000 mL gcat−1h−1. Moreover, such microfibrous entrapment technology also provided a unique combination of small catalyst particle size (0.15–0.18 mm) and entirely open structure with large void volume (71.3 vol%) thereby leading to enhanced mass transfer and high permeability (low pressure drop).
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催化剂颗粒团簇对循环流化床干甲烷重整影响的模拟
影响因子：
15.1
作者：
Mostofi, Reza;Ding, Jianmian;Wang, Shuyan;Hao, Zhenhua;Yin, Lijie;Lu, Huilin
通讯作者：
Lu, Huilin
影响因子：
3.7
作者：
Ye Liu;Hong Wang;Jianfeng Li;Yong Lu;Qingsong Xue;Jinchun Chen
通讯作者：
Ye Liu;Hong Wang;Jianfeng Li;Yong Lu;Qingsong Xue;Jinchun Chen
影响因子：
4.9
作者：
Guofeng Zhao;Huanyun Hu;Miaomiao Deng;Yong Lu
通讯作者：
Guofeng Zhao;Huanyun Hu;Miaomiao Deng;Yong Lu
影响因子：
--
作者：
FULLER, EN;SCHETTLE, PD;GIDDINGS, JC
通讯作者：
GIDDINGS, JC
影响因子：
7.2
作者：
Li, Yunhua;Wang, Yaquan;Mi, Zhentao
通讯作者：
Mi, Zhentao