摘要
天然气水合物 (NGH)是在一定温度和压力条件下 ,由水和天然气形成的类冰笼形结晶化合物。 1m3的NGH标准状态下可以携带 1 50～ 1 70m3的天然气。研究表明 ,NGH可以在 2～ 6MPa、0～ 2 0℃条件下制备 ;常压 - 1 5℃以上稳定储存 ,加热或降压可以实现NGH的分解。通过一些物理或化学的方法可以提高反应效率、降低应用物理条件。文中给出了两个NGH储运技术应用工艺流程 ,分别适用于天然气远距离运输和天然气储备、调峰 ,具有较强的应用参考价值。NGH技术与LNG技术的对比评价表明 :NGH技术难度较低 ,可节省投资 1 /3～1 /4,并具有无可比拟的安全性。从国外的发展趋势来看 ,已经趋于实际工业应用。我国今后应在NGH热动力学研究基础上 ,加强NGH应用技术的研究 ,开发出自己的NGH技术应用工艺。NGH技术有可能替代LNG技术成为未来天然气的大规模储运手段之一 ,具有巨大的应用和发展潜力。
Natural as hydrate (NGH) is an ice cage like crystalline compound formed from natural gas and water under certain temperature and pressure conditions.One cubic metre of NGH can carry 150～170 m 3 of gas under standard state.Through research,it is shown that NGH can be prepared at 2～6 MPa and 0～20℃ and storaged at -15℃ and normal pressure,and it can be decomposed by heating or by reducing pressure.The reaction rate of NGH can be raised and the physical conditions for applying NGH can be reduced by using some physical and chemical methods.In this paper two applied technological processes of NGH storage and transport technique are given out,which can be respectively applied to the distant transmission of natural gas and gas storage and peak shaving,having a relatively great reference value in practice.Through a comparison and evaluation of NGH with LNG,it is shown that the difficulty of NGH technique is relatively small,its investment can be economized by 1/3～1/4 and it has an incomparable safety.From the point of view of foreign development trend,NGH technique is trending towards practical application in industry.In the future,China should strengthen the study of the applied technique for NGH and develop self applied technology of NGH on the basis of the thermodynamic study.The NGH technique may replace LNG technique and become one of the large scale storage and transport methods for natural gas,having great potentialities of application and development.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2000年第2期93-97,共5页
Natural Gas Industry
关键词
天然气
水合物
储存技术
工艺流程
储运
Natural gas,Hydrate,Storage,Technique,Research,Technological process,Comprehensive evaluation,Developing trend
