|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Optimization and control of a reactive distillation process for the synthesis of dimethyl carbonate显示文摘Dimethyl carbonate is an environmentally benign and biodegradable chemical.Based on integration of reactive distillation and pressure-swing distillation technologies,a novel process for synthesis of dimethyl carbonate through transesterification with propylene carbonate and methanol has been developed by Huang et al.In this work,the optimization of this process was performed by minimizing the total TAC.The results show that the optimal design flowsheet can save energy consumption by 18.6% with the propylene carbonate conversion of 99.9%.Then,an effective plant-wide control structure for the process was developed.Dynamic simulation results demonstrate that the temperature/flow rate cascade control plus with simple temperature control can keep not only product purity but also the conversion of the reactant at their desired values in the face of the disturbance in reactant feed flow rate and feed composition. | Zhixian Huang Yixiong Lin Xiaoda Wang Changshen Ye Ling Li | 2017 | Chinese Journal of Chemical Engineering2017，25，8： | 8 |
| 2 | Water protection in the western semiarid coal mining regions of China: A case study显示文摘The coal industry in China has been moving from the semiarid eastern to the drier western regions since the beginning of this century.Water protection is of the utmost concern for coal mining in these regions.Lu'an,as one of the state coal mining bases in China,has been seeing increasingly heavier pressure for the protection of water resources.This article considers Lu'an as an example and describes the ways these concerns may be alleviated.High mine-water utilization rates have effectively reduced wasting of water and,consequently,have reduced water demand.Using the top layers of the Ordavician as aquifuge barriers can prevent floor karst water inrush into the longwall face and can protect the regional Ordovician karst water resources at the same time.The strength of the overlying Quaternary clay can protect against roof collapse and has successfully preserved the Quaternary porous water resource. | Huang Hanfu Wang Changshen Bai Haibo Wang Zihe | 2012 | International Journal of Mining Science and Technology2012，22，5： | 5 |
| 3 | Origin and evolution of ore-forming fluid for the Gaosongshan gold deposit, Lesser Xing’an Range:Evidence from fluid inclusions,H-O-S-Pb isotopes显示文摘Epithermal gold deposits are typical precious metal deposits related to volcanic and subvolcanic magmatism.Due to the lack of direct geological and petrographic evidences,the origin of the ore-forming fluid is deduced from the spatial diagenesis-mineralization relationship,chronological data,physicochemical characteristics of mineral fluid inclusions,mineral or rock elements and isotopic geochemical characteristics.By objectively examining this scientific problem via a geological field survey and petrographic analysis of the Gaosongshan epithermal gold deposit,we recently discovered and verified the following points:(1) Pyrite-bearing spherical quartz aggregates (PSQA) occur in the rhyolitic porphyry;(2) the mineralization is structurally dominated by WNW- and ENE-trending systems and occurs mostly in hydrothermal breccias and pyrite-quartz veins,and the ore types are mainly hematite-crusted quartz,hydrothermal breccia,massive pyrite-quartz,etc.;(3) the alteration types consist of prevalent silicification,sericitization,propylitization and carbonation,with local adularization and illitization.The ore minerals are mainly pyrite,primary hematite,native gold,and electrum,with lesser amounts of chalcopyrite,magnetite,sphalerite,and galena,indicating a characteristic epithermal low-sulfidation deposit.The ore-forming fluid may have been primarily derived from magmatic fluid exsolved from a crystallizing rhyolitic porphyry magma.Further zircon U-Pb geochronology,fluid inclusion,physicochemical and isotopic geochemical analyses revealed that (1) rhyolitic porphyry magmatism occurred at 104.6 ± 1.0 Ma,whereas the crystallization of the PSQA occurred at 100.8 ± 2.1 Ma;(2) the hydrothermal fluid of the pre-ore stage was an exsolved CO2-bearing H2O-NaCl magmatic fluid that produced inclusions mainly composed of pure vapor (PV),vapor-rich (WV) and liquid-rich (WL) inclusions with a small number of melt-(M) and solid-bearing (S) inclusions;mineralization-stage quartz contains WL and rare PV,WV and pure liquid (PL) inclusions characterized by the H2O-NaCl system with low formation temperatures and low salinities;(3) the characteristics of hydrogen,oxygen,sulfur,and lead isotopes and those of rare earth elements (REEs) provide insight into the affinity between PSQA and orebodies resulting from juvenile crust or enriched mantle.Combined with previous research on the mineralogenetic epoch (99.32 ± 0.01 Ma),we further confirm that the mineralization of the deposit occurred in the late Early Cretaceous,which coincides with the extension of the continental margin induced by subduction of the Pacific Plate beneath the Eurasian Plate.The formation of the ore deposit was proceeded by a series of magmatic and hydrothermal events,including melting of enriched juvenile crust,upwelling,the eruption and emplacement of the rhyolitic magma,the exsolution and accumulation of magmatic hydrothermal fluid,decompression,the cooling and immiscibility/boiling of the fluid,and mixing of the magmatic fluid with meteoric water,in association with water-rock interaction. | Yang Liu Jinggui Sun Jilong Han Liang Ren Alei Gu Keqiang Zhao Changshen Wang | 2019 | Geoscience Frontiers2019，10，5： | 3 |
| 4 | Cryptosporidium spp. in pet birds: Genetic diversity and potential public health significance显示文摘 | Meng Qi Rongjun Wang Changshen Ning Xiaoyu Li Longxian Zhang Fuchun Jian Yanru Sun Lihua Xiao | 2011 | Experimental Parasitology2011，，4： | 1 |
| 5 | Evaluation of the biocompatibility of a nonceramic hydroxyapatite显示文摘 | LIU Changshen WANG Wengbo SHEN Wei | 1997 | Endodontics1997，23，8： | 1 |
| 6 | Cryptosporidium tyzzeri n. sp. (Apicomplexa: Cryptosporidiidae) in domestic mice ( Mus musculus )显示文摘 | Xupeng Ren Jinfeng Zhao Longxian Zhang Changshen Ning Fuchun Jian Rongjun Wang Chaochao Lv Qiang Wang Michael J. Arrowood Lihua Xiao | 2011 | Experimental Parasitology2011，，3： | 1 |
| 7 | Prevalence of Cryptosporidium baileyi in ostriches ( Struthio camelus ) in Zhengzhou, China显示文摘 | Rongjun Wang Meng Qi Zhu Jingjing Dong Sun Changshen Ning Jinfeng Zhao Longxian Zhang Lihua Xiao | 2010 | Veterinary Parasitology2010，，1： | 1 |
| 8 | Cervine genotype is the major Cryptosporidium genotype in sheep in China显示文摘 | Yongli Wang Yaoyu Feng Bin Cui Fuchun Jian Changshen Ning Rongjun Wang Longxian Zhang Lihua Xiao | 2010 | Parasitology Research2010，，2： | 1 |
| 9 | An efficient method for the synthesis of benzoquinoline and benzo phenanthridine derivatives catalyzed by iodine by a three-component reaction of arenecarbaldehyde, naphthalen-2-amine and cyclic ketone显示文摘 | Wang Xiangshan Li Qing Yao Changshen | 2008 | Eur J Org Chem2008，，20： | 1 |
| 10 | Facile synthesis of efficient pentaethylenehexamine-phosphotungstic acid heterogeneous catalysts for oxidative desulfurization显示文摘The ultra-deep desulfurization of oil needs to be solved urgently due to various problems,including environmental pollution and environmental protection requirements.Oxidative desulfurization(ODS)was considered to be the most promising technology.The facile synthesis of highly efficient and stable HPW-based heterogeneous catalysts for oxidative desulfurization is still a challenging task.In this paper,pentamethylene hexamine(PEHA)and phosphotungstic acid(HPW)were combined by a simple one-step method to prepare a heterogeneous catalyst of PEHA-HPW for the production of ultra-deep desulfurization fuel oil.The composite material exhibited excellent catalytic activity and high recyclability,which could reach a 100% dibenzothiophene(DBT)removal rate in 30 min and be recycled at least 5 times.Experiments and DFT simulations were used to better examine the ODS mechanism of PEHA-HPW.It was proved that the rich amino groups on the surface of PEHA-HPW play a crucial role.This work provides a simple and feasible way for the manufacture of efficient HPW-based catalysts. | Chongfu Wu Changsheng Chen Zhaoyang Qi Jie Chen Qinglian Wang Changshen Ye Ting Qiu | 2023 | Chinese Journal of Chemical Engineering2023，63，11： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员