Towards Zero Carbon Emissions: Novel Low Pressure Molecular Natural Gas/CO2/H2 Storage and Separation using Semi-Clathrates

迈向零碳排放：使用半包合物的新型低压分子天然气/CO2/H2存储和分离

基本信息

批准号：
EP/E04803X/1
负责人：
Bahman Tohidi
金额：
$ 52.54万
依托单位：
Heriot-Watt University
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2008
资助国家：
英国
起止时间：
2008 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FE04803X%2F1
关键词：
Towards Zero Carbon Emissions Novel

项目摘要

Recent work carried out in this laboratory has revealed that considerable volumes of low molecular weight gases, including methane, CO2 and hydrogen, can be incorporated into structural cavities of a class of little known clathrate hydrates (or 'gas hydrates'), namely the semi-clathrate hydrates of Quaternary Ammonium Salts (QAS, e.g. tetra-n-butylammonium bromide (TBAB) at very low pressures (to atmospheric) and ambient temperature (30 oC). In addition to favourable conditions of thermodynamic stability, QAS hydrates have numerous further advantageous properties, including:1. The relative ease with which they can be formed/dissociated (by modest pressure and/or gentle temperature change) 2. The potential capacity to store large volumes of gas (62 and 52 vol/vol achieved for CH4 and H2 respectively in our preliminary experiments)3. The capability to strongly discriminate between different gases during gas uptake/hydrate growth (controlled by QAS type and aqueous concentration)4. The ability to produce readily transportable (e.g. in batch reactors, pipelines) hydrate-water slurries5. A very low parent liquid vapour pressure (similar to common salt solutions), meaning gases released from hydrates are of a very high purity (unlike for other volatile organic hydrate promoters such as THF/tetrahydrofuran)6. A relatively low toxicity compared with other organic hydrate promoters (e.g., THF) and chemicals used in gas processing (e.g., amine solutions)These properties give QAS semi-clathrates significant potential as a novel tool for the industrial storage/transportation and separation of gases. Based on the strength of results to date, a patent for this technology has been filed (GB 0511546.4: A method for gas storage, transport, peak-shaving, and energy conversion (2005)). The aim of the work proposed here is to assess the potential of this family of hydrate formers through an intensive integrated experimental and theoretical study. The technology will be investigated using three gases chosen specifically for their current importance in the global energy industry, namely natural gas (NG)/methane (CH4), carbon dioxide (CO2) and hydrogen (H2).

Recent work carried out in this laboratory has revealed that considerable volumes of low molecular weight gases, including methane, CO2 and hydrogen, can be incorporated into structural cavities of a class of little known clathrate hydrates (or 'gas hydrates'), namely the semi-clathrate hydrates of Quaternary Ammonium Salts (QAS, e.g. tetra-n-butylammonium bromide (TBAB) at very low压力（大气）和环境温度（30 OC）除了热力学稳定性的有利条件外，QAS水合还具有许多进一步的有利特性，包括：1在摄取气体/水合物生长期间，强烈区分不同气体（由QAS类型和水浓度控制）4。在批处理反应堆中，管道）水合 - 水浆液5。母体液体蒸气压力非常低（类似于常见的盐溶液），这意味着从水合物释放的气体具有很高的纯度（与其他挥发性有机水合物启动子（如THF/Tetrahydrofuran）不同）6。与其他有机水合物启动子（例如THF）和气体加工中使用的化学物质（例如，胺溶液）相比，毒性相对较低，这些特性具有QAS半层次的巨大潜力，作为工业存储/运输和气体分离的新工具。基于迄今为止的结果强度，已提交了该技术的专利（GB 0511546.4：一种气体存储，运输，剃须和能量转换的方法（2005））。这里提出的工作的目的是通过一项密集的综合实验和理论研究来评估该水合物形成者家族的潜力。该技术将使用专门针对其当前在全球能源工业中的重要性（即天然气（NG）/甲烷（CH4），二氧化碳（CO2）和氢（H2）的三种气体进行研究。