Xishen Zheng

Jilin Normal University

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Dongjun Zhao

Tianjin University of Commerce

Lijuan Wang

University of Kent

Hongjun Zheng

Zhongshan Hospital of Xiamen University

Ronglei Zhang

Jilin University

Anhuai Lu

Peking University

Rui Liu

General Research Institute for Nonferrous Metals (China)

Changqiu Wang

Peking University

Kai Jin

East China University of Science and Technology

Shangru Li

Central China Normal University

Xuejun Li

Xijing University

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Peking University

Guangdong University of Technology

Washington University in St. Louis

Beijing Institute of Geology for Mineral Resources

China University of Geosciences (Beijing)

Chinese Academy of Sciences

Tianjin University of Commerce

Cornell University

Anhui Medical University

University of Kent

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Porous Properties of Nano-fibriform Silica from Natural Chrysotile

Acta Geologica Sinica - English Edition (2010)

Lijuan Wang Anhuai Lu Changqiu Wang Xuejun Li Xishen Zheng

Abstract With the TEM and physical gas adsorption techniques, porous properties of nano-fibriform silica (MLD: 92.73%) from natural chrysotile are studied in this paper. The results indicate that porous nano-fibriform silica results from brucite octahedral sheets of nature chrysotile dissolved completely and Si-O tetrahedral sheets collapsed by acid leaching. Its length is at a micron or nanometer scale. There are two types of pores: pores among neighboring fibers and pores in nanofiber. These pores (less than 6.5 nm in diameter, mostly 2.1 nm and 3.8 nm) all belong to mesopores. The pores in fibers consist of those among SiO2 particles, those among aggregates, remnant nanotubes and capillary tubes. Nano-fibriform silica proves better than the traditional silica as a carrier of catalyzer and a filler for reinforce rubber and plastics.

Chrysotile

Brucite

Nanometre

10.1111/j.1755-6724.2006.tb00228.x

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Environmentally friendly hydraulic fracturing and water-free fracturing technologies

International Journal of Oil Gas and Coal Technology (2018)

Ronglei Zhang Xishen Zheng Shangru Li Kai Jin Hongjun Zheng

Hydraulic fracturing is an efficient stimulation technology widely employed in the petroleum industry to increase the productivity of oil and gas reservoirs, especially for unconventional reservoirs. A close look at the mechanisms and procedures of hydraulic fracturing is taken in this paper, and the major issues of water utilisation are investigated including sourcing, disposal, and resource conservation. Meanwhile, public concerns and legislative and regulatory issues associated with the environmental impacts of hydraulic fracturing are discussed. In addition, recent technical advances in hydraulic fracturing that aid to mitigate fresh water consumption and related environmental concerns are presented. Moreover, a few existing water-free fracturing technologies that avoid water consumption are reviewed and analysed. By improving the fracturing fluid management performance under the guidance of current regulations, e.g., fluid recycling and waste fluid treatment, hydraulic fracturing technologies for oil and gas reservoir development are becoming more and more environmentally friendly. [Received: February 26, 2015; Accepted: July 17, 2016]

Environmentally Friendly

10.1504/ijogct.2018.090968

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Citations (9)