Interactions of refractory materials with molten gasifier slags
Interactions of refractory materials with molten gasifier slags
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DOI：
10.1016/j.ijhydene.2010.04.117
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发表时间：
2011-04-01
影响因子：
7.2
通讯作者：
Moss, Tyler
中科院分区：
文献类型：
--
作者：
Nakano, Jinichiro;Sridhar, Seetharaman;Moss, Tyler
目前的研究重点是两种合成渣（基于煤和石油焦原料的平均灰分化学）和两种耐火材料（90重量% Cr2 O3 -10重量% Al 2 O3和100重量% Al 2 O3）之间的座滴界面反应的分析，使用共聚焦扫描激光显微镜（CSLM）。将研磨的炉渣样品（小于325目）放置在耐火基底上的特定微结构位置处，并使用金像加热室在CO/CO2气体混合物（体积比= 1.8）的气氛中加热至1500 ℃。炉渣/耐火材料界面的横截面表明炉渣独特地渗透到耐火材料的优选区域中，并且颗粒溶解到炉渣中，这促进了耐火材料的剥落。最初，渣侵蚀晶界和精细微结构区域，将氧化铝颗粒释放到渣中。在石油焦渣中形成VOX基结晶材料被发现改变液体组成。含铬晶体层的化学剥落也促进了耐火材料的降解。版权所有（C）2010，氢能出版有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
The current study focuses on the analysis of sessile-drop interfacial reactions between two synthetic slags (based on average ash chemistries of coal and petcoke feedstock) and two refractory materials (90 wt% Cr2O3-10 wt% Al2O3 and 100 wt% Al2O3), using a Confocal Scanning Laser Microscope (CSLM). Ground slag samples (less than 325 mesh) were placed at specific microstructure locations on refractory substrates and heated to 1500 degrees C in an atmosphere of CO/CO2 gas mixture (volume ratio = 1.8), using a gold-image heating chamber. Cross-sections of the slag/refractory interface indicated unique slag penetration into preferred areas of the refractory and grain dissolution into the slag which promoted spalling of the refractory. Initially, the slag attacked both grain boundaries and fine microstructure areas, freeing alumina grains into the slag. The formation of VOx-based crystalline material in the petcoke slag was found to alter the liquid composition. Chemical spalling of Cr-containing crystal layer also facilitated degradation of the refractory. Copyright (C) 2010, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.