龙舌兰蔗渣生物质作为还原剂还原钛铁矿

IF 2.5 3区 材料科学 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
Miguel Ángel Martínez-Ponce, Noemí Ortiz Lara, Fabiola Nava-Alonso, Mario Ávila-Rodríguez, Ricardo Morales Estrella, Ramiro Escudero García, Carlos León-Patiño, Diana Cholico-González
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引用次数: 0

摘要

生物质是一种可再生能源,应用生物质可减少二氧化碳排放,减少化石燃料的开采,改善管理,而且成本低,因为生物质被认为是一种废物。从龙舌兰酒业中获得的龙舌兰蔗渣生物质具有 S、N 和灰烬含量低等显著特点,这对还原钛铁矿(FeO-TiO2)等铁矿物非常有用。钛铁矿的还原需要高温和较长的停留时间;焦炭是一种常见的还原剂,但成本较高且储量有限。因此,钛铁矿的还原是一个具有挑战性的过程,而龙舌兰蔗渣等可再生还原剂的整合提供了一个很好的替代方案。这项工作的重点是利用龙舌兰甘蔗渣还原钛铁矿;通过 X 射线衍射、扫描电子显微镜和金属化百分比评估了温度、停留时间和钛铁矿与龙舌兰甘蔗渣中碳的摩尔比(I:AB)的影响。在 1373 K、30 分钟和 I:AB = 1:2.1 条件下,钛铁矿还原产生了 TiO2,总铁量的 85.6% 转化为金属铁。龙舌兰甘蔗渣在钛铁矿还原的同一步骤中转化,避免了生物质的预处理。实验结果与热力学数据的相关性表明,钛铁矿还原在很大程度上取决于生成的碳,但挥发性物质会产生孔隙率。龙舌兰甘蔗渣生物质是钛铁矿在较短停留时间内的极佳还原剂,可实现较高的金属化百分比。它是碳源的替代品,有助于废物利用,实现更可持续的工艺。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Agave Bagasse Biomass as Reducing Agent for the Reduction of Ilmenite

Agave Bagasse Biomass as Reducing Agent for the Reduction of Ilmenite

Biomass is a renewable energy source, and its application represents a diminution of CO2 emissions, low fossil fuels exploitation, better management, and low cost because biomass is considered a waste. Agave bagasse biomass obtained from the Tequila industry has remarkable characteristics such as low S, N, and ashes contents, which are useful for the reduction of the ferrous minerals such as ilmenite (FeO∙TiO2). Reduction of ilmenite requires high temperatures and long residence times; coke is a common reductant but has elevated cost and limited reserves. Therefore, the reduction of ilmenite is a challenging process and the integration of renewable reductant sources such as agave bagasse offers a good alternative. This work focuses on reducing ilmenite by agave bagasse; the effect of temperature, residence time, and molar ratio of ilmenite:carbon from agave bagasse (I:AB) were assessed by X-ray diffraction, scanning electron microscopy, and metallization percentage. At 1373 K, 30 min, and I:AB = 1:2.1, the reduction of ilmenite produced TiO2 and 85.6% of total iron was converted in metallic iron. Agave bagasse is transformed in the same step as ilmenite reduction, avoiding the pre-treatment of the biomass. A correlation of the experimental results with the thermodynamic data demonstrates that ilmenite reduction depends highly on the carbon generated, but the volatile matter creates porosity. Agave bagasse biomass is an excellent reducing agent for the ilmenite at short residence times, achieving a high metallization percentage. It is a substitute for carbon sources, contributing to the utilization of waste for a more sustainable process.

Graphical Abstract

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来源期刊
Journal of Sustainable Metallurgy
Journal of Sustainable Metallurgy Materials Science-Metals and Alloys
CiteScore
4.00
自引率
12.50%
发文量
151
期刊介绍: Journal of Sustainable Metallurgy is dedicated to presenting metallurgical processes and related research aimed at improving the sustainability of metal-producing industries, with a particular emphasis on materials recovery, reuse, and recycling. Its editorial scope encompasses new techniques, as well as optimization of existing processes, including utilization, treatment, and management of metallurgically generated residues. Articles on non-technical barriers and drivers that can affect sustainability will also be considered.
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