SBIR Phase II: A Reversible, Colorimetric Hydrogen Safety Sensor Using Tailored Xerogels

SBIR 第二阶段：使用定制干凝胶的可逆比色氢安全传感器

• 批准号: 0521760
• 负责人: Kisholoy Goswami
• 金额: --
• 依托单位: InnoSense LLC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0521760&HistoricalAwards=false
• 关键词: SBIR; Phase; II; Reversible; Colorimetric

This Small Business Innovation Research (SBIR) Phase II research project will optimize performance of an optical safety sensor for integration with the hydrogen economy infrastructures. Feasibility of the sensing approach was demonstrated by developing a sol-gel-titania-based indicator formulation, which showed complete reversibility, and response and recovery time of less than a minute with 4% hydrogen. Safety remains a top priority since leakage of hydrogen in air during production, storage, transfer and distribution creates an explosive atmosphere for concentrations between 4% (v/v) - the lower explosive limit (LEL) and 74.5% (v/v) - the upper explosive limit (UEL) at room temperature and pressure. Being a very small molecule, hydrogen is prone to leakage through seals and micro-cracks. The sensor will be further improved with regard to its dynamic detection range, response and recovery times, sensitivity, accuracy, resolution and reduced interference from temperature fluctuations, and atmospheric gases including humidity.Hydrogen economy is new; public acceptance of hydrogen fuel would require the integration of a reliable safety sensor. Global energy consumption is projected to increase by 50% over the next 20 years. Failure to develop alternatives to oil would heighten growing reliance on oil imports, raising the risk of political and military conflict and economic disruption. The acceptance of hydrogen by the general public as an alternative fuel requires a safety sensor for mitigating the explosion risks due to hydrogen leakage at unacceptable levels.

这个小型企业创新研究（SBIR）第二阶段研究项目将优化光学安全传感器的性能，以便与氢经济基础设施集成。 通过开发溶胶-凝胶-二氧化钛基指示剂制剂证明了传感方法的可行性，该制剂显示出完全可逆性，并且响应和恢复时间小于4%氢气的一分钟。安全性仍然是重中之重，因为在生产、储存、运输和分配过程中氢气在空气中的泄漏会在室温和压力下产生浓度在4%（v/v）-爆炸下限（LEL）和74.5%（v/v）-爆炸上限（UEL）之间的爆炸性环境。氢是一种非常小的分子，易于通过密封件和微裂纹泄漏。该传感器将在动态检测范围、响应和恢复时间、灵敏度、准确度、分辨率以及减少温度波动和包括湿度在内的大气气体的干扰方面得到进一步改进。氢经济是一个新的概念;公众接受氢燃料将需要集成可靠的安全传感器。 预计未来20年全球能源消耗将增加50%。 如果不开发石油替代品，将加剧对石油进口的日益依赖，增加政治和军事冲突以及经济混乱的风险。 公众接受氢作为替代燃料需要安全传感器来减轻由于氢泄漏在不可接受的水平而引起的爆炸风险。