In order to make more liquid products like gasoline, the oligomerition of a C4 feedstock taking placeon catalyst containing ZSM-5 was studied in a pressurized reactor. The products were C5- gas, liquid hydro-carbons a...In order to make more liquid products like gasoline, the oligomerition of a C4 feedstock taking placeon catalyst containing ZSM-5 was studied in a pressurized reactor. The products were C5- gas, liquid hydro-carbons and coke. During the reaction on the catalyst BO-1, when the WHSV was 0.71h-1 and total pressurewas 4.0MPa, the C5+ product yield reached a maximum at a temperature around 320℃. As oligomerizationreaction was the dominating one, there were minor C9 hydrocarbons in liquid products and the main productswere C7 and C8 olefins and n- C10 paraffins. When the temperature was higher than 286℃, a small amount of C9hydrocarbons was formed and more normal and isomeric paraffins other than olefins were formed in products.Gasoline yield increased linearly with a rising total pressure under the same operating conditions.展开更多
C_(4)F_(7)N/CO_(2)/O_(2)混合气体以其优异的环保和绝缘性能成为目前最具潜力替代SF6应用于电力工业的气体绝缘介质。尽管O_(2)的加入可以在一定程度上提升C_(4)F_(7)N/CO_(2)混合气体的绝缘性能和化学稳定性,但O_(2)加入及其体积分数...C_(4)F_(7)N/CO_(2)/O_(2)混合气体以其优异的环保和绝缘性能成为目前最具潜力替代SF6应用于电力工业的气体绝缘介质。尽管O_(2)的加入可以在一定程度上提升C_(4)F_(7)N/CO_(2)混合气体的绝缘性能和化学稳定性,但O_(2)加入及其体积分数变化对混合气体局部放电(partial discharge,PD)作用下气体和固体副产物生成特性的影响规律尚不清楚。因此通过针–板电极模拟设备内的金属突出物缺陷开展C_(4)F_(7)N/CO_(2)/O_(2)96 h PD及其分解特性试验。研究发现C_(4)F_(7)N/CO_(2)混合气体中加入体积分数2%~4%的O_(2)可以显著抑制大部分副产物的生成,O_(2)体积分数大于6%时每秒累积放电量和平均放电量急剧增加,导致混合气体分解加剧;C_(4)F_(7)N/CO_(2)/O_(2)在长时间PD作用下板电极表面中心区域出现较为明显的圆环状固体析出物,主要成分包括金属氧化物(CuO)、氟化物(CuF、CFx)、碳氧化合物(CO、CO_(2))和氮氧化合物(NO、NO_(2));体积分数4%的O_(2)加入对PD固体析出物的元素组成及其价态影响较小,但可以一定程度上减少其生成量,混合气体中O_(2)对金属导体的腐蚀作用弱于C_(4)F_(7)N。展开更多
文摘In order to make more liquid products like gasoline, the oligomerition of a C4 feedstock taking placeon catalyst containing ZSM-5 was studied in a pressurized reactor. The products were C5- gas, liquid hydro-carbons and coke. During the reaction on the catalyst BO-1, when the WHSV was 0.71h-1 and total pressurewas 4.0MPa, the C5+ product yield reached a maximum at a temperature around 320℃. As oligomerizationreaction was the dominating one, there were minor C9 hydrocarbons in liquid products and the main productswere C7 and C8 olefins and n- C10 paraffins. When the temperature was higher than 286℃, a small amount of C9hydrocarbons was formed and more normal and isomeric paraffins other than olefins were formed in products.Gasoline yield increased linearly with a rising total pressure under the same operating conditions.
文摘C_(4)F_(7)N/CO_(2)/O_(2)混合气体以其优异的环保和绝缘性能成为目前最具潜力替代SF6应用于电力工业的气体绝缘介质。尽管O_(2)的加入可以在一定程度上提升C_(4)F_(7)N/CO_(2)混合气体的绝缘性能和化学稳定性,但O_(2)加入及其体积分数变化对混合气体局部放电(partial discharge,PD)作用下气体和固体副产物生成特性的影响规律尚不清楚。因此通过针–板电极模拟设备内的金属突出物缺陷开展C_(4)F_(7)N/CO_(2)/O_(2)96 h PD及其分解特性试验。研究发现C_(4)F_(7)N/CO_(2)混合气体中加入体积分数2%~4%的O_(2)可以显著抑制大部分副产物的生成,O_(2)体积分数大于6%时每秒累积放电量和平均放电量急剧增加,导致混合气体分解加剧;C_(4)F_(7)N/CO_(2)/O_(2)在长时间PD作用下板电极表面中心区域出现较为明显的圆环状固体析出物,主要成分包括金属氧化物(CuO)、氟化物(CuF、CFx)、碳氧化合物(CO、CO_(2))和氮氧化合物(NO、NO_(2));体积分数4%的O_(2)加入对PD固体析出物的元素组成及其价态影响较小,但可以一定程度上减少其生成量,混合气体中O_(2)对金属导体的腐蚀作用弱于C_(4)F_(7)N。
