Reducing energy-related carbon emissions while maintaining the industrial economic development was an inevitable choice for achieving sustainable development. Based on the extend Kaya identity and the logarithmic mean Divisia index method（LMDI）, a decoupling efforts decomposition model was constructed, which were adopted to analyze energy structure, energy intensity, industrial structure and industrial output for industrial carbon emissions impact and their relative decoupling efforts. The results showed that industrial output factor played a promoting role in industrial carbon emissions, energy intensity factor and industrial structure factor had some inhibitory effect, and energy structure factor's role was very limited. 2002—2012, Liaoning province was in a weak decoupling effort period, and the efforts was not ideal. 2012—2014, Liaoning province was in a strong decoupling effort period, the effects was significant for reducing carbon emissions.

The residual strength evaluation of corroded pipeline carried out regularly was significant for guiding pipeline maintenance and operation safety. Effective Area Method, an important residual strength evaluation technique, was studied. A corrosion defect measure method was proposed, which was suitable for the Effective Area Method. The computer program was compiled according to the calculation model of Effective Area Method. The residual strength of an actual pipeline defect was evaluated by the Effective Area Method and Modified B31G respectively. The result showed that the Effective Area Method was less conservative than Modified B31G.

In order to analyze the stress and strain of single directly crossing pipeline with anchor block influenced by gravity and the inner pressure, the finite element analysis software ANSYS was used to make numerical simulation. Through changing the length and the pipe diameter of crossing pipeline, the stress concentration point and the pipeline failure point were found. Conclusions were made as follows: with the increase of the pipeline length, the stress and strain increased by the influence of gravity and the inner pressure. When the length exceeded 25 m, the crossing pipeline structure failed in strength. When the diameter reached 610 mm, it also failed. To avoid the failure of the pipeline, the comprehensive influenced factors should be thought about, and truss crossing pipeline and suspending pipeline should be used.

The three dimensional model of the pipe leakage in the open ground was established and the grid refinement was made to aim at the highspeed leak areas. Using CFD commercial software FLUENT 6.3 for gas pipeline leakage process was simulated. The different wind speed, the influence of the initial velocity and leak mouth shapes (round and diamond) under the condition of leak were examined. The numerical simulation results showed that the wind speed had a great influence on jet angle on gas leak. The diffusion range increased with the diffusion height. The initial velocity had a great influence on jet height. The diffusion height increased with the initial velocity increasing. The wider range of hydrogen sulfide leak was circle leak mouth. The simulation results had certain significance for long distance natural gas pipeline leakage diffusion laws awareness and accident prevention.

The heavy oil electric heat pipe tracing twodimensional unsteady model was established to analyze the influence and the laws of heavy oil pipeline safety shutdown time under the thickness of pipe insulation, the number of heating pipes and location parameters. The results show that in the case of a single tube with heat, when the pipe thickness was respectively 60, 70 mm, and 80 mm, corresponding security shutdown time was about 26, 30 h, and 34 h| in the case of double pipes heating, the change of the angle between the two tubes had the smaller impact on the safety shutdown time, and the safety shutdown time was about 36 h.

According to different damage process of natural gas pipeline leakage diffusion problems, using FLUENT software, CFD simulation model was established, and studied the different leak diameter of the effects on gas leakage diffusion area and simulated the natural gas leak and diffusion process between mountain and city terrain. The situation of wind speed changing along with the height and mass discharge rates variable with the time were taken into account and UDFs were programmed into the FLUENT to amend them. It concluded that the bigger hold can achieve the higher range, the max lower explosive limit of the high from the ground and downwind horizontal distances of diameter of 6.35 , 25.40 mm and 101.60 mm were 92 m and 322 m,122 m and 770 m, 408 m and 1291 m. When diffuses on the surface and in the soil, the 101.60 mm leak diameter had the maximum diffusion range. The biggest downwind horizontal distances were up to 80 m and 105 m respectively. This was because the gas lost a lot of turbulent energy influenced by the soil above the pipeline.

To study the impact of reducer pipeline on batch transportation of mixed product oil when there was a large drop at a crossing point, CFD multiphase flow model was used and transportation control equation was established based on petroldiesel oil mixture. Simulation about mixed volume of reducer pipeline placed in front of or behind the elbow was calculated and presented with pictures. The analysis show that when reducer pipeline placed in front of the elbow, the length of mixed oil was fairly equal and more diesel oil would mix into petrol under the petrol first order. While reducer pipeline placed behind the elbow, the length of mixed oil was longer and the average volume fractions of crossing sections along every axial were unevenly distributed under the petrol first order. Therefore for the reducing of mixed volume, it was appropriate for placing reducer pipeline in front of the elbow and taking the diesel oil first order when batch transportation pipeline was passing through the crossing point.

Pmodified HZSM5 catalysts were prepared by impregnation and used in the reaction of methanol to propylene as the catalyst. The effect of different phosphorous precursor amount on their catalyst characterization and catalytic performance is investigated. The results show that the amount of strong acid sites of phosphorus modified catalysts decreased, while that of weak acid sites increased. The increase of P loading with the range of 0% and 0.5% leads to the decrease of specific surface area and micropore volume, the increase of average pore size as well. However, there is no change in the framework and crystallinity. Compared with HZSM5, the stability of P/HZSM5 catalyst has been significantly improved, and the selectivity to propylene was significantly increased. And when the mass fraction of P is 0.25%, Propylene selectivity could be up to 54.6%.

To study the diffusing of gas piercing leakage, finite volume method is used to establish CFD simulation model that detects different locations where gas pipes leak and four styles of diffusing, leakage of the upper, lower, windward and leeward side of the pipeline, were numerically simulated. According to the research, the leakage of lower is closer to the ground and diffuses less easily than the upper leakage, which has a 30～70 m larger dangerous area of cross range section. The leakage of windward side is similar to the leeward side, but the lengthwise section area of the former leakage is larger and more dangerous than the latter. And this simulation of leakage area provides theoretical base for safety transportation of gas and security maintenance of pipelines.

In the new mixed solvent of waste lubricant regeneration research process, applied the orthogonal method, investigated the refined effect of the operating temperature, refining time, the ratio of oil to solvent, the amount of the second solvent added to (DMF), the amount of the auxiliary solvent (polyether2070) added to five factors in four different levels. The range analysis shows that the added amount of the DMF and polyether2070 are the key factors of influencing the yield, as the change of the amount of polyether 2070 added to has little effect on the viscosity index, while the volumic ratio of solvent to oil and the amount of DMF added to on the viscosity index of the big influence.Mean analysis shows that the best refining conditions of the solvent is for the temperature being 80 ℃, the refine time being 30 min, the volumic ratio of solvent to oil being 1.5∶1, the amount of DMF added to being 15%, polyether2070 added to being 0.2%. In the optimal experimental conditions, the total yield of renewable lubricant reaches 91.7%, its viscosity index reaches 108.8.

Ethanol-gasoline is a clean and reproducible fuel with potential of development, the key effects hydrated ethanol- gasoline blends' popularization and application is its stability. Through the test of hydrated ethanol-gasoline'cloud point change, hydrotropy of surfactant and cosolvent were investigated for hydrated ethanol-gasoline blends.The experimental results show that heterogeneous alcohols cosolvent has a better hydrotropy on ethanol- gasoline blends; Multiplex cosolvents is better than a single cosolvent, among whch the combination of isoamyl alcohol and isobutyl alcohol is the best. Emulsifier SP-80 to hydrated ethanol-gasoline has the better hydrotropy than heterogeneous alcohols cosolvent, and with the increased amount of it, the effect is more significant. Emulsifier SP-80 blends with additives isoamyl alcohol has the best effect, with the conditions: when SP-80 volume content is 1.0% and isoamyl alcohol volume content is 1.0%, ethanol and gasoline phase separation temperature dropped to -35.0 ℃.