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The technology of separating normal paraffins from the naphtha through the adsorption process was studied to optimize the steam cracking feedstock and utilize the naphtha resource properly. 摘要为了优化乙烯裂解原料并合理利用石脑油资源，将石脑油中的正构烷烃进行分离。
In this paper,the application of Z501 naphtha steam pre reforming catalyst in hydrogen production units is presented. 介绍Z501型预转化催化剂在制氢装置的工业应用。
New technology of inhibition of coke formation and its application in the ethylene steam cracking are also introduced. 综述了近几年在乙烯裂解过程中结焦机理研究及结焦抑制技术的进展。
The sources and compositions of steam cracking C9 cut in China and overseas were reviewed. 摘要系统总结了裂解碳九（C9）来源、组成及其综合利用情况；
Light alkenes production by hydrocarbon selective oxidation is one of the promising alternative ways to replace conventional steam cracking. 摘要在探索替代传统的烃类蒸汽热裂解制取低碳烯烃工艺的众多研究中，烃类经选择氧化制取低碳烯烃是具有发展前景的方法之一。
Studies on the operating parameters with hydrogenation tail oil as feedstock to provide reliable scientific data for commercial steam cracking were conducted on a pilot plant. 为更好地掌握加氢尾油作裂解原料的工艺参数，为装置工业化生产提供可靠的科学依据。
naphtha steam reforming catalyst 轻油蒸汽转化催化剂
Study for process optimization of steam cracking of LPG is done in the paper,, it is researched how cracking temperature, water oil ratio and residence time influence the yield of products. 对以液化气(LPG)为原料裂解生产乙烯的工艺进行优化研究,探讨了裂解温度、水油比和停留时间对裂解产物组成的影响,以期找出最佳工艺条件。
OPTIMIZATION OF STEAM CRACKING FEEDSTOCK 蒸汽裂解原料优化
STUDY ON THE STEAM CRACKING OF HYDROCRACKING TAIL OIL 加氢裂化尾油蒸汽裂解性能的研究
A little crack detracts from the value of the vase. 小小的裂痕减损那个花瓶的价值。
The steam tug takes canal boats and barges in tow. 驳船后面拖着小艇和平底船。
The steam found a vent through a crack in the pipe. 蒸气从管子的裂缝漏出去。
Advances in Coke Inhibition Technology of Ethylene Steam Cracking Furnace 乙烯裂解炉结焦抑制技术进展
The mirror fogged up with the steam. 镜子因蒙上水气而模糊不清。
The marchers jumped off at the crack of dawn. 行军队伍在破晓时出发了。
The engines are driven by steam. 这些发动机是由蒸汽驱动的。
The riot police started to crack down on them. 防暴警察开始对他们采取镇压行动。
Steam puffed up from a crack in the metal. 蒸气从金属缝隙中冒出来。
Parents must let children blow off steam sometimes. 做父母的有时必须让孩寸们吵吵闹闹，发泄发泄。