论文成果

发布时间：

2025-04-30

论文名称：

Hydraulic and thermal effects of coke deposition during pyrolysis of hydrocarbon fuel in a mini-channel

发表刊物：

Energy & Fuels

摘要：

Coke deposition in a mini-channel reduced the effective diameter greatly during pyrolysis of hydrocarbon fuel. In the paper, the hydraulic resistance method (HRM) was introduced to quantitatively evaluate the coke deposition. Pyrolysis of hydrocarbon fuel was carried out at fuel temperature up to 725 °C at supercritical pressure of 4 MPa in an electrically heated mini-channel (heated length, 508.0 mm; inner diameter, 2.0 mm; wall thickness, 0.5 mm). The test run was maintained at steady state for 30 min. The post-test coke evaluation by HRM is nondestructive and onboard performed at normal temperature and pressure. Compared with the optical microscope visualization, the HRM was validated to be feasible and effective. Experimental results show that the thickness of coke deposit along the channel, varying from several to about 130 μm, is a function of film temperature (average of the wall and bulk fuel temperature). Contributing to the coke deposition during fuel pyrolysis, the hydraulic resistance continuously increased. However, depending on the deposit thickness, the thermal effects can be contrary. The gully coke nature at high Re turbulent flow and the large deposit thickness as a thermal resistance can dominate to enhance and reduce the heat transfer, respectively.

合写作者：

Zhaohui Liu, Qincheng Bi, Yong Guo, Xuesong Ma, Zhuqiang Yang, Jianguo Yan,

卷号：

26

页面范围：

3672-3679.

是否译文：

否

发表时间：

2012-05-30