Distillation and desulfurization of tire pyrolysis oil

轮胎热解油的蒸馏脱硫

• 批准号: 505655-2016
• 负责人: Dalai, Ajay
• 金额: $ 1.02万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618281
• 关键词: Distillation; desulfurization; tire; pyrolysis; oil

The disposal for waste/used tires is a serious concern because it requires a lot of space, and dumped tires are an environmental hazard and a home for diseases. With increasing growth worldwide, almost 1 billion tires are discarded each year. One of the major areas to capitalize on this waste is conversion of waste tires to energy. One of the processes to convert waste tire to liquid fuel is pyrolysis. However, the pyrolysis fuel contains 1.0-1.4 wt.% sulfur, which needs to be lowered before it can be used as fuel. As per US Environmental Protection Agency, 15ppm sulfur is permitted in diesel transportation fuel. The major desulfurization process adopted by refineries is the hydrodesulfurization (HDS) process. It is a catalytic process at high temperatures (350-400 °C) and pressure (7-10 MPa) in the presence of hydrogen. However, the expensive infrastructure for HDS and availability of hydrogen at the tire pyrolysis sites is a major concern. Therefore, this work proposes an oxidative desulfurization (ODS) process, which uses chemical solvents and adsorbents instead of hydrogen. The tire pyrolysis oil will be fractionated using spinning band distillation into gasoline, diesel, naphtha and bottoms. The diesel and naphtha fractions will be treated using an ODS process with or without catalyst and adsorbents. The treated oil will be tested for change in sulfur, paraffins, olefins and aromatics content post treatment. It is proposed that the designed ODS process will be able to remove more that 99% sulfur from diesel fraction of tire pyrolysis oil and will produce fuel suitable for use in the transportation industry.

废弃/旧轮胎的处理是一个严重的问题，因为它需要大量的空间，并且倾倒的轮胎是环境危害和疾病的家园。随着世界范围内的增长，每年有近10亿个轮胎被丢弃。利用这种废物的主要领域之一是将废轮胎转化为能源。将废轮胎转化为液体燃料的方法之一是热解。然而，热解燃料含有1.0-1.4重量%的硫，在用作燃料之前需要降低硫含量。根据美国环境保护署的规定，柴油运输燃料中允许含有15 ppm的硫。炼油厂采用的主要脱硫工艺是加氢脱硫（HDS）工艺。这是一个在高温（350-400 °C）和高压（7-10 MPa）下，在氢气存在下的催化过程。然而，HDS的昂贵基础设施和轮胎热解地点的氢气可用性是一个主要问题。因此，这项工作提出了一种氧化脱硫（ODS）的过程，它使用化学溶剂和吸附剂，而不是氢气。轮胎热解油将使用旋转带蒸馏分馏成汽油、柴油、石脑油和底部产物。柴油和石脑油馏分将使用ODS工艺处理，有或没有催化剂和吸附剂。将测试处理后的油的硫、石蜡、烯烃和芳烃含量的变化。建议所设计的ODS工艺将能够从轮胎热解油的柴油馏分中去除99%以上的硫，并将生产适合于在运输工业中使用的燃料。