As the declining of oil, coal and other fossil fuel, and the rising of environmental pollution and greenhouse's effect, natural gas, as a kind of high efficient and clean energy, has been given a great attention and favour by the countries all over the world. Natural gas liquefaction and storage technology is key to its use and development. The latest theory research shows that the construction of long distance LNG pipeline is feasible in technology and reasonable in the economy. However the researches of the liquefaction station of long distance LNG pipeline are few. The liquefaction process of the liquefaction station along the long distance LNG pipelines was discussed. Through the analysis on the reverse Carnot cycle, combined with cooling characteristics of refrigerant such as propane, ethylene, methane, liquefaction process of liquefaction station along long-distance LNG pipeline was proposed and related equipments were selected.

The effects of reaction temperature, reaction time and mass ratio of catalyst to oil on product distribution, yields of light olefins (including ethylene, propylene and butylene), and group composition of gasoline upgraded were investigated by using micro-reactor and gas chromatograph integrated method in catalytic reformulating. The experimental results show that olefin content in gasoline decreases from 42.6% in raw material to nearly 13.4%, which is met with the requirements of new gasoline standard. The contents of iso-alkane and aromatics are markedly increased from 28.4% and 18.2% to 40.4% and 35.7%, respectively, while the octane number of gasoline is not reduced. Meanwhile, higher yields of light olefins (25%) are also obtained after FCC gasoline being reformulated under laboratory conditions. In addition, higher reaction temperature, longer reaction time, and higher mass ratio of catalyst to oil are beneficial to decrease olefin content of FCC gasoline and increase the yields of light olefins.

    A new catalyst for non -hydrogen - dewaxing was prepared by hydrothermal method , using ZSM -5 as the principal component and then adding self -made BCM zeolites.Its catalytic performance was evaluated using catalytic cracked diesel fuel and AGO NO .3 as feed stock .The results show that catalyst has obviousde -waxing effect.The pour point can be reduced by 62 ℃, and higher liquor yield(>95%)were obtained at the temperature of 340 ℃ and space velocity of 1 h -1 .The diesel oil produced using the catalyst shows higher cetane number index , lower content of sulfur and nitrogen, and lower pour point , can meet the quality requirements of product blending .

    N -Methylpyrrolidone (NMP)used as solvent for lube oil refining has strong dissolving ability , perfect selectivity , and good environmental protection function.But the rate of denitride is low , and the corrosion of the equipments is also a problem .The No .1 refinery' s vacuum gas oil w as use as feedstocks in the experiment , and it was refined by NM P solvent and additive to increase the rate of denitride .The maximum denitrification rate reaches to 84 .54%.A series of extractant , with different mass fraction of the denitrifier and different volumicration of solvent and oil, were titrated by the standard titration of potassium hydroxide and ethanol,and their aciditys were computed by the consumption of the standard titration.According to the acidity' s curve , the effect of mass fraction of the denitrifier and volumic ratio of solvent and oil on acidity is investigated, the acidity increases with the increasing of the mass fraction of the denitrifier , and decreases with the increasing of the volumic ratio of solvent and oil .The denitrifier has no effect on oxidization of NMP solvent