Permeation Behavior of Oxide Bonded SiC Ceramics at High Temperature and Prediction of Pressure Drop in Candle Filters

IF 1.5 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Transactions of the Indian Ceramic Society Pub Date : 2022-04-03 DOI:10.1080/0371750X.2022.2064918

Atanu Dey, N. Kayal, O. Chakrabarti, M. Innocentini

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引用次数: 1

Abstract

Oxide-bonded silicon carbide supports of porosity ranging from 33% to 47% were prepared by heating powder compacts (SiC, clay and alumina) at 1400°C in air with graphite acting as a pore former. The supports were spray-coated with an aqueous slurry of fine SiC powder (d50=15 μm), then sintered to produce a filtering layer with thickness ranging from 116 to 200 μm and average pore size ranging from 5 to 20 μm. Airflow tests were performed on both supports and coated filters at temperatures ranging from 25° to 700°C and superficial velocities ranging from 0.02 to 0.9 m.s−1. Experimental permeability coefficients were used to simulate the pressure drop behavior of hypothetical candle filters for industrial combustion/gasification processes (biomass combustion in water-tube steam boilers (BCSB), pressurized fluidized-bed combustion (PFBC) and integrated gasification combined cycle (IGCC)). The simulated permeation properties of the hypothetical candles were compared to those of commercial hot gas filters. GRAPHICAL ABSTRACT

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氧化物结合SiC陶瓷在高温下的渗透行为及滤筒压降预测

通过在1400°C的空气中加热粉末压块（SiC、粘土和氧化铝），以石墨作为成孔剂，制备孔隙率在33%至47%之间的氧化物结合碳化硅载体。用细SiC粉末的水性浆液（d50=15μm）喷涂载体，然后烧结以产生厚度在116-200μm范围内、平均孔径在5-20μm范围的过滤层。在25°C至700°C的温度和0.02至0.9 m.s−1的表观速度范围内，对支架和涂层过滤器进行了气流测试。实验渗透系数用于模拟工业燃烧/气化过程（水管蒸汽锅炉中的生物质燃烧（BCSB）、加压流化床燃烧（PFBC）和整体气化联合循环（IGCC））中假设的蜡烛过滤器的压降行为。将假想蜡烛的模拟渗透特性与商用热气过滤器的模拟渗透性能进行了比较。图形摘要

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来源期刊

Transactions of the Indian Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family. The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.