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| 1 | Microwave-assisted pyrolysis of vegetable oil soapstock:Comparative study of rapeseed,sunflower,corn,soybean,rice,and peanut oil soapstock显示文摘In this study,the effects of catalytic temperature and the type of soapstock on products from microwave-assisted pyrolysis were investigated.HZSM-5 was used as the catalyst to study the pyrolysis of six different soapstocks at 200℃,300℃,and 400℃ catalytic temperature.Results showed that the bio-oil yields initially increased and then decreased with the increase in catalytic temperature.When the catalytic temperature was 300℃,the bio-oil reached up to the maximum value(65.8 wt.%).Findings indicated that the composition of bio-oil was related to the degree of unsaturation of fatty acids sodium in the soapstocks.In the case of saturated fatty acid sodium,a series of alkanes was formed,whereas the pyrolysis of monounsaturated fatty acid sodium resulted mainly in cycloalkanes,the cycloalkenes obtained from bio-oil was produced by polyunsaturated fatty acid sodium. | Yunpu Wang Shumei Zhang Qiuhao Wu Dengle Duan Yuhuan Liu Roger Ruan Guiming Fu Leilei Dai Lin Jiang Zhenting Yu Zihong Zeng Xiaojie Tian Xiuhua Yang | 2019 | International Journal of Agricultural and Biological Engineering2019，12，6： | 3 |
| 2 | Biorefinery process for production of bioactive compounds and bio-oil from Camellia oleifera shell显示文摘A biorefinery process was developed in this study to obtain bioactive compounds and bio-oil from Camellia oleifera shells.Four different extraction techniques(water,ethanol,ultrasound-assisted deionized water,and ultrasound-assisted ethanol)were utilized to extract tea saponin and tannin from C.oleifera shells.Results showed that ethanol had better extraction capacity than did deionized water,and ultrasound could promote the dissolution of tannin and tea saponin in solution.The thermogravimetric curves of the samples treated under the four conditions moved toward high temperatures.This phenomenon indicated the thermal stability of the residue was significantly improved.The pretreatment showed a slight effect on the chemical compositions of bio-oil.Specifically,the samples treated with ethanol and ultrasound-assisted deionized water contained higher phenol contents(81.07%and 81.52%,respectively)than the other samples.The content of organic acid decreased with an increase in the phenol content. | Yunpu Wang Linyao Ke Qi Yang Yujie Peng Yanzhe Hu Leilei Dai Lin Jiang Qiuhao Wu Yuhuan Liu Roger Ruan Guiming Fu | 2019 | International Journal of Agricultural and Biological Engineering2019，12，5： | 1 |
| 3 | HYDROFORMYLATION OF OLEFINS CATALYZED BY HOMOGENEOUS HETERONUCLEAR METAL CLUSTER [PhCH_2Me_3N][FeCo_3(CO)_(12)]显示文摘Hydroformylation of olefins catalyzed by heteronuclear metal cluster [PhCH2Me3N]-[FeCo3(CO)12] was studied. The effect of temperature, pressure, and solvent ect. on olefin hydroformylation was examined. The results show that for the hydroformylation of various olefins, e.g. 1-hexene, isobutene, 2-octene, cyclohexene, diisobutene, and styrene, the Fe-Co cluster exhibits rather high activity under mild conditions. For example, under the pressure such of 4 MPa, H2/CO ratio of 1: 1, at 120℃, 1-hexene was hydroformylated to heptanal with the conversion of > 80% and the selectivity of > 95% in 1 hr. | Luo Yuzhong, Fu Hongxiang, Zhang Shuwei(Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, China) Wang Yunpu, Wu Nan, Zhang Aimi(Northwestern Teachers College, Lanzhou, China) | 1990 | 分子催化1990，4，S1： | 0 |
| 4 | Flight Time Minimization of UAV for Cooperative Data Collection in Probabilistic LoS Channel显示文摘This paper investigates the data collection in an unmanned aerial vehicle(UAV)-aided Internet of Things(IoT) network, where a UAV is dispatched to collect data from ground sensors in a practical and accurate probabilistic line-of-sight(LoS) channel. Especially, access points(APs) are introduced to collect data from some sensors in the unlicensed band to improve data collection efficiency. We formulate a mixed-integer non-convex optimization problem to minimize the UAV flight time by jointly designing the UAV 3D trajectory and sensors’ scheduling, while ensuring the required amount of data can be collected under the limited UAV energy. To solve this nonconvex problem, we recast the objective problem into a tractable form. Then, the problem is further divided into several sub-problems to solve iteratively, and the successive convex approximation(SCA) scheme is applied to solve each non-convex subproblem. Finally,the bisection search is adopted to speed up the searching for the minimum UAV flight time. Simulation results verify that the UAV flight time can be shortened by the proposed method effectively. | Yan Li Shaoyi Xu Yunpu Wu Dongji Li | 2024 | China Communications2024，21，2： | 0 |
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