Co-gasification of blast furnace dust with petcoke for sustainable waste management

IF 7.1 2区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Waste management Pub Date : 2025-02-01 DOI:10.1016/j.wasman.2024.12.027
Rakesh Saini, Danda Srinivas Rao, Santosh Deb Barma
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Abstract

This study employed a lab-scale fluidized bed steam gasification setup to perform the co-gasification experiments with blast furnace dust (BFD) and petcoke (PC) − wastes from the steel and refining industries, respectively. Multiple experiments were conducted at the optimized conditions to decipher the effects of the mineralogical content of the feed samples on the gasification performance parameters. With the addition of iron and zinc-abundant BFD sample to PC, an effective enhancement in the ability of the gasifier to produce hydrogen-rich synthesis gas was observed, attributed to an increase in surface active sites for gasification reactivity. An increase of almost 3% and 12 % in cold gas and carbon conversion efficiencies, respectively, was attributed to the catalytic effect of iron and zinc-containing phases in the product ash, resulting in a positive surge in the heating values and the product gas yields. To decipher the catalytic effect, the feed and product samples were characterized by employing analytical techniques of XRF, XRD, TGA, FTIR, SEM techniques with EDX analysis. The co-gasification product ash sample showed the formation of different zinc and iron dominating minerals, such as franklinite (ZnFe2O4), zincite (ZnO), hematite (Fe2O3), and magnetite (Fe3O4), to cater the needs of the growing world mineral demands, as a secondary mineral resource. This work exhibited a novel method to utilize industry wastes with the simultaneous removal of toxic substrates. Overall, potential energy recovery from industrial by-products was highlighted, providing insights towards developing a sustainable waste management technology with scalable prospects of a circular industrial economy.

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高炉粉尘与石油焦共气化的可持续废物管理。
本研究采用实验室规模的流化床蒸汽气化装置,分别与来自钢铁和炼油工业的废弃物——高炉粉尘(BFD)和石油焦(PC)进行共气化实验。在优化后的条件下进行了多次实验,分析了进料样品矿物学含量对气化性能参数的影响。在PC中加入富铁和富锌的BFD样品后,由于气化反应活性的表面活性位点增加,气化炉产生富氢合成气的能力得到了有效增强。由于产品灰分中含铁相和含锌相的催化作用,冷煤气和碳转化效率分别提高了近3%和12%,导致热值和产品煤气收率的正增加。为了解催化效果,采用XRF、XRD、TGA、FTIR、SEM和EDX等分析技术对原料和产物样品进行了表征。共气化产物灰分样品显示,为了满足日益增长的世界矿物需求,形成了不同的锌和铁主导矿物,如锌褐矿(ZnFe2O4)、锌褐矿(ZnO)、赤铁矿(Fe2O3)和磁铁矿(Fe3O4),作为次要矿产资源。这项工作展示了一种利用工业废物同时去除有毒底物的新方法。总的来说,强调了从工业副产品中回收能源的潜力,为开发具有可扩展的循环工业经济前景的可持续废物管理技术提供了见解。
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来源期刊
Waste management
Waste management 环境科学-工程:环境
CiteScore
15.60
自引率
6.20%
发文量
492
审稿时长
39 days
期刊介绍: Waste Management is devoted to the presentation and discussion of information on solid wastes,it covers the entire lifecycle of solid. wastes. Scope: Addresses solid wastes in both industrialized and economically developing countries Covers various types of solid wastes, including: Municipal (e.g., residential, institutional, commercial, light industrial) Agricultural Special (e.g., C and D, healthcare, household hazardous wastes, sewage sludge)
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