Two-dimensional combustion modelling and experimental research on oil shale semicoke
Two-dimensional combustion modelling and experimental research on oil shale semicoke
复制标题
油页岩半焦二维燃烧模拟及实验研究
DOI：
10.1016/j.fuel.2019.115891
复制
发表时间：
2019-11
期刊：
影响因子：
7.4
通讯作者：
Jin Yan
中科院分区：
文献类型：
--
作者：
Huang Yiqun;Zhang Man;Deng Boyu;Kong Hao;Zhang Yanjun;Lyu Junfu;Yang Hairu;Jin Yan
由于油页岩半焦的高灰分和层状结构的各向异性，灰分厚度和层状结构的各向异性对油页岩半焦燃烧的影响至关重要。建立了油页岩半焦颗粒燃烧的二维数学模型，并在自行设计的Macro热重分析仪（TGA）上对桦甸油页岩半焦颗粒进行了燃烧实验验证，称量量超过100 g。圆柱形油页岩半焦颗粒燃烧过程中存在明显的各向异性，这是由于平行于层面和垂直于层面方向上的氧有效扩散系数不同所致。沿着平行于层面的方向燃烧比垂直于层面的方向燃烧快。理论上，直径与厚度之比远小于1的较厚油页岩半焦颗粒燃烧得更快，因为它们在颗粒内具有较高的氧的总体有效扩散率。由于油页岩半焦在燃烧初期转化率较低，低氧浓度不利于油页岩半焦的燃尽。
Due to high ash content and anisotropy of bedding structure, the effects of ash thickness and bedding structure anisotropy on combustion of oil shale semicoke were crucial. A two-dimensional mathematical model of oil shale semicoke particle combustion was developed and validated by combustion experiments of cylindrical Huadian oil shale semicoke particles on the self-designed Macro thermal gravimetric analyzer (TGA), with a weighting capacity over 100 g. There was obvious anisotropy during the combustion of cylindrical oil shale semicoke particles due to the difference of the effective diffusivity of oxygen between the directions parallel and perpendicular to the bedding planes. Combustion was faster along the direction parallel to the bedding planes than that perpendicular to the bedding planes. Theoretically, thicker oil shale semicoke particles with a ratio of diameter to thickness much less than one burnt faster, since they had a higher overall effective diffusivity of oxygen within the particles. A low oxygen concentration was harmful for the oil shale semicoke burnout due to a quite low conversion rate at the initial combustion stage.
登录
查看更多内容
影响因子：
5.3
作者：
Jillian L. Goldfarb;A. D’Amico;C. Culin;E. Suuberg;I. Külaots
通讯作者：
Jillian L. Goldfarb;A. D’Amico;C. Culin;E. Suuberg;I. Külaots
DOI：
--
发表时间：
2008
期刊：
--
影响因子：
--
作者：
Li Shao-hua
通讯作者：
Li Shao-hua
页岩炭颗粒灰层中氧传质各向异性研究
DOI：
10.1021/ef1001919
发表时间：
2010-05
期刊：
Energy & Fuels
影响因子：
--
作者：
Liu, Jianguo;Yan, Junwei;Han, Xiangxin;Jiang, Xiumin
通讯作者：
Jiang, Xiumin
DOI：
--
发表时间：
2010
期刊：
Journal of Jilin University
影响因子：
--
作者：
Liu Hongpeng
通讯作者：
Liu Hongpeng
影响因子：
4.4
作者：
Xiangxin Han;Xiumin Jiang;Z. Cui
通讯作者：
Xiangxin Han;Xiumin Jiang;Z. Cui