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Feasibility Study of a Fossile Fueled Zero Emission Vehicle

机译:化石燃料零排放车的可行性研究

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This study investigates the technical feasibility of onboard carbon capture in vehicles. In fact there are two different main concepts of hybrid electric vehicles with batteries and range extenders proposed. The first concept uses an Internal Combustion Engine as range extender. Carbon dioxide is separated from the flue gas of this Internal Combustion Engine by chemical or physical absorption. In the second concept a solid oxide fuel cell (SOFC) is used as a range extender. The CO remaining in the anode exhaust gas is not combusted as usual by mixing anode and cathode exhaust gases but shifted with water vapor, sufficient available in the anode exhaust gas flow, to H_2 and CO_2. The H_2 is separated by a membrane permeable only for H_2 and recycled by the methane flow to the SOFC stack. Carbon dioxide can then be separated by simply condensing the water vapor of the anode exhaust gas of the SOFC. Carbon dioxide can either remain onboard chemically bonded, e.g., as carbonate with the absorption media or stored in a pressure vessel after desorption or condensation of the water vapor. As one mole methane produces one mole CO_2, the CO_2 can be stored in one chamber of a double chamber tank. The tank is, e.g., divided into two chambers with variable volume by a non-permeable but flexible membrane; on the other side of this membrane methane is stored. At the gasoline station the empty methane chamber is filled with new methane and the CO_2 is discharged simultaneously providing also simple fueling and CO_2 removal methods. Carbonate can also be disposed at the gasoline station and calcinated in centralized plants, i.e., CO_2 can be separated and CaO reused. Furthermore all concepts are compared in fuel efficiency and general feasibility. The SOFC concept seems to be the most attractive one, because it shows the highest efficiency, uses the simplest CO_2 capture concept and releases the captured CO_2 in gaseous state, providing the simplest CO_2 discharging method.
机译:本研究调查了车辆船上碳捕获的技术可行性。事实上,有两种不同的混合动力电动车辆具有电池和范围扩展器的主要概念。第一个概念使用内燃机作为范围扩展器。二氧化碳通过化学或物理吸收与该内燃机的烟气分离。在第二概念中,固体氧化物燃料电池(SOFC)用作延伸器。通过混合阳极和阴极废气,在阳极和阴极废气中均匀地燃烧阳极废气中的CO不燃烧,而是用水蒸汽移动,阳极废气流量足够可用于H_2和CO_2。 H_2通过仅用于H_2的膜和通过甲烷流回收到SOFC堆叠的膜分离。然后可以通过简单地冷凝SOFC的阳极废气的水蒸气来分离二氧化碳。二氧化碳可以保持在化学键合的船上,例如,作为碳酸酯,与吸收介质或储存在水蒸气的解吸或冷凝后的压力容器中。当一个摩尔甲烷产生一个摩尔CO_2时,CO_2可以存储在双室罐的一个腔室中。罐是例如,通过不透水但柔性膜分成两个具有可变体积的腔室;在该膜的另一侧储存。在汽油站,空甲烷室填充有新的甲烷,并且CO_2同时排出,同时提供简单的燃料和CO_2去除方法。碳酸盐也可以设置在汽油站,并在集中植物中煅烧,即,可以分离CO_2,CAO重复使用。此外,所有概念都以燃油效率和一般可行性进行比较。 SOFC概念似乎是最具吸引力的概念,因为它显示了最高效率,使用最简单的CO_2捕获概念并在气态状态下释放捕获的CO_2,提供最简单的CO_2放电方法。

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