Gas-Phase Synthesis of Hydrocyanic Acid through Oxidation of N2

N2 氧化气相合成氢氰酸

• 批准号: 2459357
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2459357
• 关键词: Gas; Phase; Synthesis; Hydrocyanic; Acid

This project aims at revisiting the synthesis of hydrocyanic acid on an industrial scale to address two main challenges: 1. Sustainability/CO2-footprint: The current synthetic pathway starts with activating nitrogen from air via the Haber-Bosch-process and converting it in a series of chemical conversion steps to hydrocyanic acid. In synthesizing ammonia, much H2 is required, which is the reagent that accounts for the greatest carbon-footprint in chemical industry. However, this hydrogen is not required in the final product, but it is converted to water in the subsequent steps. We therefore propose to create a novel, more sustainable process option for the synthesis of hydrocyanic acid that likely involves activation of nitrogen from the air through oxidation rather than with hydrogen. As this will be a heterogeneously catalyzed gas-phase process, continuous processing is the only reasonable mode of operation - and a gas-phase flow-chemistry process will be required to carry out R&D on this topic.2. Distributed manufacturing: HCN is one of the most hazardous and toxic compenents that is handled in the chemical industry at large scale. Therefore, in big "Verbund" sites hydrocyanic acid is produced in one plant and directly transported to the next plant via pipelines, where it is consumed. However, transportation on roads or rivers to other sites is undesired and almost impossible. Therefore, it is simply not available at smaller sites without a designated world-scale hydrocyanic acid plant, limiting the range of synthetic options at the smaller site and the flexibility of planning production within a company. It would be attractive to come up with a flow chemical process that can be operated at smaller sites produces just the required (small) amount. A continuous (flow chemistry) process would be of advantage from a safety perspective (in-situ generation) and because of the specific investment in setting up the plant (in Euros per ton and year). In its conception phase, this project will be holistically assess various processing alternatives based on sustainability and techno-economical aspects. It will require chemical engineering skills to operate gas-phase processes in a safe way. We expect a large fraction of the experimental work to deal with heterogeneous catalysis as this determines yield and selectivity of the process.

该项目旨在在工业范围内重新审查氢烯酸的合成，以应对两个主要挑战：1。可持续性/二氧化碳 - 脚印：当前的合成途径始于通过HABER-BOSCH-PROCOSS从空气中激活氮气，并通过Haber-Bosch-Process激活氮，并在一系列化学转换步骤中转化为氢化烯酸。在合成氨的过程中，需要大量的H2，这是化学工业中最大的碳足迹的试剂。但是，最终产品中不需要这种氢，但是在随后的步骤中会转换为水。因此，我们建议创建一种新型，更可持续的工艺选择，以合成氢氰酸的合成，该选择可能涉及通过氧化而不是用氢来激活氮气从空气中激活。由于这将是一种异质催化的气相过程，因此连续处理是唯一合理的操作模式，并且将需要进行气相流化学过程才能在此主题上进行研发2。分布式制造：HCN是化学工业中大规模处理的最危险和有毒的组成部分之一。因此，在大型“静脉”部位中，氢糖酸是在一种植物中生产的，并直接通过消耗的管道运输到下一个植物。但是，在道路或河流上运输到其他地点是不希望的，几乎是不可能的。因此，在没有指定世界规模的氢烯酸厂的较小地点，它根本不可用，这限制了较小站点的合成选择范围，并且在公司内计划生产的灵活性。提出一个可以在较小的站点进行操作的流动化学过程将很有吸引力。从安全的角度（原位生成）以及建立工厂的特定投资（以每吨和年份为单位），连续（流动化学）过程将是有优势的。在其概念阶段，该项目将根据可持续性和技术经济方面的各种处理替代方案进行整体评估。它将需要化学工程技能以安全的方式操作气相过程。我们期望实验性工作的很大一部分能够处理异质催化，因为这决定了过程的产量和选择性。