The refinery industry is an energy⁃intensive industry. So the efficient recycle and utilization of light hydrocarbon gases will solve the difficulties of energy conservation and environmental protection.The adsorption and the adsorption⁃hydration method were applied to separate C2 from the simulated refinery dry mixture gas of M1(C2H6(11.55%)+C2H4(12.46%)+CH4(29.15%)+N2(27.02%)+H2(19.82%)).The collected mixture gas M2 was secondary separated by ZIF⁃8. The result showed that molar fraction of C2 was decreased to 9.90% after primary separation process using adsorption⁃hydration method.Because of the higher concentration of C2,the values of y_(C_2 ) and MC of product using the adsorption⁃hydration method were better than the adsorption method under the same initial pressure. Because the molar fraction of C2 in M2 was low, the hydrate was difficult to be formed in the system of M2, and the adsorption method with dry ZIF⁃8 was proved to be adaptive to separate the gas mixture of M2 to avoid the negative effects of water in the system of wet ZIF⁃8. Through the two⁃step separation process, the molar fraction of C2 in M1 was decreased from 24.01% to 2.90%.

A visible⁃light induced strategy for C-C bond cleavage, amination of cyclobutanols was reported. The key alkoxy radicals were generated by employing inexpensive cerium catalyst, though charge transfer under visible⁃light irradiation which would undergo a selective β⁃scission and trapped by DBAD to afford hexahydropyridazine derivatives effectively.This reaction combines visible light and inexpensive cerium salts to develop a general practical strategy for the selective carbon⁃carbon bond cleavage and functionalization of ketones. Under operationally simple conditions, cyclobutanone compounds can be successfully converted into universal chemical structural units. Provides a nitrogen⁃containing compound while enriching the carbon⁃carbon bond breaking conversion method.

The denoising effect of the negative pressure wave signal and the extraction of the feature vector are the key factors affecting the accuracy of the oil pipeline leakage detection. Aiming at the false negatives and false positives in pipeline leak detection, this paper proposed an improved fully integrated empirical mode decomposition algorithm (improved CEEMDAN) with adaptive white noise to preprocess the negative pressure wave signal. The CEEMDAN decomposition is performed on the negative pressure wave signal measured by the upstream and downstream pressure sensors of the pipeline to obtain a plurality of intrinsic mode functions (IMF). And the effective IMF component is selected according to the correlation coefficient principle of the dual channel sensor. An entropy⁃based eigenvector is proposed, and the energy entropy, kurtosis entropy and permutation entropy of the effective IMF component are input to support vector machine (SVM) to distinguish different working conditions. Through field data verification, the improved CEEMDAN combined with the entropy⁃based feature vector can effectively improve the accuracy of oil pipeline leakage condition identification, and has certain field application value.

Bounded reservoir produced oil mainly by self-expanding energy, and pressure decreases rapidly. It can increase bounded reservoir pressure and formation expansion ability by injecting CO ₂ or flue gas. Injected flue gas, CO2 and heavy oil into a HTHP PVT equipment, and measured it's viscosity and volume factors in the condition 1 MPa to 7 MPa. Simulating heavy oil, after injected flue gas or CO ₂ , pressure depleted recovery process by using core huff and puff experiment. Experimental results show the CO ₂ and flue gas dissolved in oil can greatly decrease oil viscosity. Oil viscosity, saturated CO ₂ , decreased more than 95%, and volume expansion increased 15% in 40 ℃, 7 MPa condition；but in the same condition oil viscosity, saturated flue gas, decreased 38.1%，and volume expansion increased 4.9%. Pressure depletion experiments show the injecting 0.4 PV gas is optimum. It can displace out 57.84% oil by injecting three runs o.4 PV CO ₂; and get 43.99% by injecting three runs 0.4 PV flue gas. Oil recovery increases separately 17.31%, 13.29% by injecting 0.4 PV CO ₂ or flue gas after water flooding.