发展燃料二甲醚不划算

二甲醚（DME）作燃料有很多优点：首先，在同等温度条件下，其饱和蒸汽压低于液化石油气（LPG），故贮存、运输比液化气安全；其次，由于DME本身含有氧，虽然其热值比LPG低，但燃烧过程中所需理论空气远低于LPG，所以它的预混热值及理论燃烧温度高于LPG；另外，DME分子碳链短，燃烧性能良好，热效率高，是一种优质、清洁的燃料。     

合成氨联产二甲醚技术

二甲醚（简称DME）的物理性能与液化石油气（简称LPG）相似,因DME自身含氧,所以DME燃烧性能好、热效率高,燃烧过程中无残液、无黑烟,是一种优质、清洁的燃料,被称为21世纪清洁能源。     

发展燃料二甲醚不经济

二甲醚（DME）作燃料有很多优点：首先，在同等温度条件下，其饱和蒸气压低于液化石油气（LPG），故贮存、运输比液化气安全：其次，由于DME本身含有氧，虽然其热值比LPG低，但燃烧过程中所需理论空气远低于LPG，所以它的预混热值及理论燃烧温度高于LPG；另外，DME分子碳链短，燃烧性能良好，热效率高，是一种优质、清洁的燃料。DME还是柴油发动机的替代燃料，其十六烷值大于55，具有优良的压缩性，与柴油相比，动力特性好，低温启动性能及加速性好，燃烧尾气排放污染物少。     

替代燃料二甲醚在梭式窑中的燃烧实验研究

在对二甲醚(DME)进行理论燃烧计算的基础上,开展了DME作为替代燃料应用于梭式窑的燃烧实验研究,观察了随燃料DME流量的增加,预混和非预混燃烧火焰的变化,研究了空气系数对垂直烟道处火焰的影响。在1.0m3梭式窑内进行DME与石油液化气(LPG)的对比实验,实测数据结果表明,由于DME烧成排烟热损失比LPG降低了7.79%,DME烧成热耗比LPG烧成热耗低8.85%,窑炉热效率提高9.6%。     

DME与LPG复合燃料推广应用的问题与对策

部分省市实践证明,推广使用含20%DME的DME与LPG复合燃料是可行的。分析了DME与LPG复合燃料推广应用中存在的问题,提出了对策:(1)尽快出台DME与LPG复合燃料国家标准;(2)DME与LPG复合燃料的储运、燃气设备的适应性改造;(3)研发价格合适的适应DME与LPG复合燃料的密封材料;(4)建立完善的DME与LPG复合燃料的质量监控体系。     

二甲醚相关产品的储运要求

分析了LPG、DME产品的国家标准、行业标准中的标志、包装、运输和贮存要求,DME基本套用LPG的相关标准、规范、设备,可满足设计生产要求。建议:DME相关产品的装卸、储运设备要专用;DME与LPG混合燃料储存不宜太久;密封材料要有针对性的选用。     

绿色燃料-二甲醚

二甲醚(DME)是一种清洁环保型燃料,本文介绍了其性质、用途,以及DME的几种生产方法.     

浅析甲醚的生产现状及发展前景

二甲醚又称作甲醚，简称DME。甲醚因其良好的理化性质而被广泛地应用于化工、日化、医药和制冷行业，近几年更因其燃烧效果好和污染少而被称为“清洁燃料”，引起广泛关注！     

液化石油气、二甲醚产品标准述评

介绍了我国现行有效的液化石油气、二甲醚产品的国家标准、行业标准的关键内容。现行有效的液化石油气、二甲醚产品的国家标准、行业标准以及部分省市DME与LPG复合燃料的地方标准推动了燃气产业发展,为DME与LPG复合燃料国家标准的发布实施奠定了坚实基础。     

二甲醚制取碳-化工下游产品的技术进展

二甲醚（简称DME）作为一种清洁产品具有多种用途。它可作为民用燃料代替液化气，作为清洁燃料代替柴油，还可用作冷冻剂、溶剂、气雾剂的抛射剂和特种燃料等。同时经也是一种用途广泛的重要有机化工产品，可合成多种化学品及参与多种化学品的合成。因此二甲醚碳-化工下游产品的开发越来越受到人们的重视。     

二甲醚洁净燃料的开发与应用

二甲醚（ＤＭＥ）有高的十六烷值，作为柴油代用燃料具有良好性质，其排放物比美国加州超低排放标准还要低。二甲醚物性与液化石油气相似，可代替液化石油气作为优良的民用洁净燃料。     

Industrial gas turbine combustion performance test of DME to use as an alternative fuel for power generation

DME (dimethyl ether, CH₃OCH₃) is both a good alternative fuel for transportation and power generation and an LPG substitute owing to its cleanliness, multi-source productivity and the ease with which it is transported. This study was conducted to verify whether DME is a good fuel for gas turbines and to identify potential problems in fuelling a commercial gas turbine with DME. In this study, the GE7EA gas turbine of the Pyong-tak power plant in Korea was selected as the target of DME application. Combustion performance tests were conducted by comparing DME with methane, which is a major component of natural gas. Most results of the combustion performance tests show that DME is very clean and efficient fuel for gas turbines. However, other results have shown that it is necessary to retrofit a fuel nozzle to the combustor in consideration of the combustion properties of DME in order to enhance the availability and reliability of DME fired gas turbines.     

Performance and emission characteristics of an SI engine operated with DME blended LPG fuel

In this study, a spark ignition engine operated with DME blended LPG fuel was experimentally investigated. In particular, performance, emissions characteristics (including hydrocarbon, CO, and NO_x emissions), and combustion stability of an SI engine fuelled with DME blended LPG fuel were examined at 1800 and 3600 rpm.Results showed that stable engine operation was possible for a wide range of engine loads up to 20% by mass DME fuel. Further, we demonstrated that, up to 10% DME, output engine power was comparable to that of pure LPG fuel. Exhaust emissions measurements showed that hydrocarbon and NO_x emissions were slightly increased when using the blended fuel at low engine speeds. However, engine power output was decreased and break specific fuel consumption (BSFC) severely deteriorated with the blended fuel since the energy content of DME is much lower than that of LPG. Furthermore, due to the high cetane number of DME fuel, knocking was significantly increased with DME.Considering the results of the engine power output and exhaust emissions, blended fuel up to 10% DME by mass can be used as an alternative to LPG, and DME blended LPG fuel is expected to have potential for enlarging the DME market.     

Effect of n-Butane and propane on performance and emission characteristics of an SI engine operated with DME-blended LPG fuel

In this study, a spark ignition engine operated with DME-blended LPG fuel was studied experimentally. In particular, the effect of n-Butane and propane on performance, emissions characteristics (including hydrocarbon, CO, and NOx), and the combustion stability of an SI engine fuelled with DME-blended LPG fuel were examined. Four kinds of test fuel with different blend ratios of n-Butane, propane, and DME were used. The percentage of DME in the fuel blend was 20% by mass.The results showed that stable engine operation was possible for a wide range of engine loads with propane containing LPG/DME-blended fuel rather than n-Butane containing LPG/DME-blended fuel since the octane number of propane is higher than that of n-Butane. Also, engine power output, break specific fuel consumption (BSFC), and combustion stability when operating with propane containing DME-blended fuel were comparable to those values in case of pure LPG fuel operation. Engine power output was decreased and BSFC was increased with n-Butane containing DME-blended fuel due to the lower energy density of DME. To examine the effect of n-Butane and propane on emissions and fuel economy in an actual vehicle, a vehicle was tested during an FTP-75 cycle. Through the emission and fuel economy test in the FTP-75 cycle, we conclude that the differences in emission level and fuel economy were not significant according to the blend of n-Butane, propane, and DME.Considering the experimental results from the engine bench and the actual vehicle, the 20% content of DME-blended fuel, regardless of LPG type, can be used as an alternative fuel for LPG.     

二甲醚替代液化石油气（LPG）作火炬燃料气试验

为了降低火炬燃料气费用和企业的安全生产,以二甲醚替代LPG作火炬燃料气试验,采用自动点火、将二甲醚的压力稳定在0．08MPa,助燃风的压力控制在0．1MPa,结果表明：火炬系统完全可以用二甲醚替代液化石油气（LPG）作火炬燃料气。     

Fundamental investigations on di-methyl ether (DME) as LPG substitute or make-up for domestic uses

The paper reports a series of experimental and model studies performed to assess the potential application of di-methyl ether (DME) as a substitute fuel in domestic appliances, commonly fed with LPG. Results are presented about combustion tests performed with pure DME and mixtures with propane and butane in variable concentrations, along with endurance and stability experiments, carried out to evaluate safety and compatibility of this fuel. The major conclusion is that a mixture of DME/LPG (DME: 15–20 vol.%) brings significant further improvement compared to pure DME.     

清洁燃料型二甲醚的开发具有重要战略意义

二甲醚特有的物理化学性质决定了清洁燃料二甲醚的开发对我国国民经济发展具有重要战略意义。随着世界各国环保意识的增强 ,二甲醚将进一步替代氟氯烃用于气雾剂、致冷剂和发泡剂。由于我国能源资源匮乏 ,二甲醚作为民用燃料用于醇醚燃料、液化气和柴油汽车燃料的代用品的条件也日趋成熟 ,到 2 0 10年二甲醚在中国的需求量将超过 30 0 0万t。截至 2 0 0 3年底 ,全球二甲醚总生产能力约为 30万t。二甲醚的开发已成为世界能源技术研究的热点。     

21世纪洁净燃料——二甲醚

二甲醚作为一种新型的洁净燃料受到广泛的关注,详细介绍了二甲醚的国内外市场,已建、在建、拟建装置状况,对二甲醚替代液化石油气和柴油的可行性和技术开发状况做了详细的分析和介绍。对比了两步法和一步法合成二甲醚的生产工艺,最后对二甲醚市场和技术的发展提出了建议。     

Safety distance analysis of dimethylether filling stations using a modified individual risk assessment method

The physical properties of dimethylether (DME) are similar to conventional fuels such as LPG and diesel, so DME has been recently considered one of the most promising candidates for a substitute for them. Equipment failures in gas stations lead to accidents that pose significant threats to people and property. Therefore, prior to commercialization, safety standards for DME need to be developed based on risk analysis. In this study, we focused on safety distance in DME filling stations. A hypothetical DME filling station was modeled based on a DME-LPG mixed filling station designed by KOGAS, and safety distances were suggested from a semi-quantitative risk estimation approach using individual risk calculations. Modified individual risk calculations were performed with consequence analysis and failure mode under varying accident scenarios. Compared with existing individual risk analysis, the modified-individual risk approach is supplemented with a weighting factor to graduate each accident scenario by historical analysis. Subsequently, the outcome shows the individual risk that suggests a safety distance. To compare with conventional fuel, we also performed a comparative study on the filling station fuels LPG and DME. According to the quantitative risk estimation results, we propose a separation distance based on accident scenarios for each facility. In conclusion, safe distances for DME facilities are lower than those that dispense LPG. Therefore, a DME filling unit can be placed at conventional gas stations without increasing the safety distance. The results will also be useful in determining the standard for safety management of renewable and sustainable energy.     

二甲醚的制备与应用前景

综述了二甲醚的性质、制备方法、应用前景，比较了二甲醚制备方法的优缺点，其中，一步法生产二甲醚具有较高的经济价值。二甲醚作为一种重要的清洁能源和环境友好产品，其在车用燃料、民用燃料、化工原料方面的应用研究越来越受到重视，特别是作为燃料电池的燃料有着广阔的发展前景。