Physicochemical properties of Indonesian lignite continuously modified in a tunnel-type microwave oven for slurribility improvement

Cheng, Jun; Zhou, Fan; Wang, Xin; Liu, Jianzhong; Zhou, Junhu; Cen, Kefa

doi:10.1016/j.fuel.2015.02.051

Cited by 19 publications

(3 citation statements)

References 55 publications

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“…Then, the contact angle of coal was measured with a contact angle analyzer (JC2000C, Shanghai Zhongchen Ltd., China). During measurement, a droplet of deionized water was dropped on the smooth end face of the prepared cylinder, and the droplet was photographed at the exact moment when it contacted the cylinder. , The contact angle was then calculated using the built-in image processing software.…”

Section: Methodsmentioning

confidence: 99%

Pore Characteristics and Slurryability of Coal Blends

et al. 2016

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The pore characteristics and slurryability of two coal blends between Shigang anthracite coal and Huangling bituminous coal (SG/HL), and Guizhou anthracite coal and Xiaotun lean coal (GZ/XT), respectively, were investigated. The fractal dimensions of coal were calculated in the two regions of P/P 0 < 0.45 and P/P 0 > 0.45 and defined as D 1 and D 2, respectively. Upon an increase in the blending ratio of parent coal with smaller BET surface area (S BET) and total pore volume (TPV), the S BET and TPV of coal blends monotonously decreased. D 1 was mainly related to the S meso/macro(10–220 nm)/S total and mineral phase within coal while D 2 was closely affected by the V meso(2–10 nm)/V total. D 1 of SG/HL coal blends had no apparent linear correlation with the pore structure parameters whereas D 1 of GZ/XT coal blends changed linearly with the pore structure parameters. Both D 2 of SG/HL coal blends and that of GZ/XT coal blends changed linearly with the pore structure parameters. The slurry quality of coal water slurry (CWS) prepared from coal blends is comprehensively affected by the physicochemical properties and blending ratio of parent coals. Therefore, the maximum solid loading (MSL) and water separation ratio (WSR) of CWS prepared from coal blends do not always change linearly with the blending ratio of parent coal.

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Section: Methodsmentioning

confidence: 99%

Pore Characteristics and Slurryability of Coal Blends

et al. 2016

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“…Cheng [21,25] employed microwave irradiation to improve the properties of CWS prepared from air-dried Shenhua coal and air-dried Philippine lignite. Cheng [26] also investigated the preparation of CWS from Indonesian lignite that was continuously modified in a tunnel-type microwave oven. The investigated CWS had a solid concentration of 30-54 wt.% and a viscosity of 900-1100 mPaÁs at a shear rate of 100 s À1 .…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the amplitude for the improvement of the solid concentration of CWS was small. Cheng [26] did not consider the energy consumption differences between external and internal moisture in lignite during microwave irradiation. Lignite dewatering is a continuous, overlapping and complex process that is characterized first by the removal of external moisture and then by removal of internal water.…”

Section: Introductionmentioning

confidence: 99%