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89:
used to characterize the maximum volume fraction of a solid object obtained when they are packed randomly. This method of packing has been used since the early 1820s; the types of packing used were originally made out of glass spheres. However, in 1850 they were replaced by a more porous pumice stone
395:
Sheng, Miaopeng; Liu, Chenguang; Ge, Chunyuan; Arowo, Moses; Xiang, Yang; Sun, Baochang; Chu, Guangwen; Zou, Haikui (2016). "Mass-Transfer
Performance of CO2 Absorption with Aqueous Diethylenetriamine-Based Solutions in a Packed Column with Dixon Rings".
169:. Dixon rings require pre-wetting (flow of liquid over the packed bed prior to starting the reaction flow). While this increases batch processing startup time, the increased performance of the Dixon ring overcomes this.
423:
Jin, Yanchao; Hu, Runzhi; Wang, Yiping; Cui, Yong; Liu, Yun; Huang, Qunwu (2017). "The effect of Dixon rings on direct contact heat transfer performance: Comparison of counter and co-current evaporation".
266:
105:, which was more effective than previous forms of random packing and became very popular. Raschig rings are usually built from ceramic or metal and provided a large
34:
used in chemical processing. They consist of a stainless steel mesh formed into a ring with a central divider, and are intended to be packed randomly into a
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realized the importance of a high void fraction and having the internal surface of the packing media take part in the mass transfer. He designed the
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370:"Measurement of HETP of SUS Dixon Ring and Porcelain Packing in Small-Scale Water Distillation Column for H
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316:
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The enhanced performance of the Dixon ring is based on liquid surface tension: when the mesh is wet its
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of the packed column (in fact, they were called "wire gauze
Lessing rings" in a 1949 publication).
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fluids which can be liquid/liquid or liquid/gas. The fluids are passed through in a
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Kaba, Akira; Akai, Reijiro; Yamamoto, Ichiro; Kanagawa, Akira (October 1988).
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409:
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Dixon rings are used for mainly for laboratory distillation applications.
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are used in a range of industries to allow intimate contact between two
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within the column for interaction between liquid and gas vapors.
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increases greatly, with an accompanying increase in the rate of
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Table showing the physical properties of Dixon rings
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121:applied for a patent of a new product for column
398:Industrial & Engineering Chemistry Research
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438:10.1016/j.applthermaleng.2017.02.054
129:mesh instead of sheet steel in the
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113:The development of the Dixon ring
117:In 1943 Dr Olaf George Dixon of
378:Nuclear Science and Technology
38:. Dixon rings provide a large
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54:and many other applications.
50:rate, making them useful for
426:Applied Thermal Engineering
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261:{\displaystyle m^{2}/m^{3}}
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97:In the early 20th century
374:O-HTO Isotope Separation"
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46:while maintaining a high
410:10.1021/acs.iecr.6b02280
133:in order to improve the
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157:Performance principles
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317:Random column packing
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87:Random column packing
82:Random column packing
342:U.S. patent 2615832A
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404:(40): 10788–10793.
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76:countercurrent flow
466:Chemical equipment
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174:
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78:through a column.
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281:Void space %
99:Friedrich Raschig
18:Draft:Dixon rings
16:(Redirected from
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295:Number per litre
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127:stainless steel
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355:"Transactions"
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90:and pieces of
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68:Packed columns
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63:Packed columns
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32:random packing
30:are a form of
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226:Surface area
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471:Distillation
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384:(10): 69–74.
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163:surface area
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131:Lessing ring
123:distillation
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107:surface area
103:Raschig ring
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40:surface area
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432:: 762–772.
149:Dixon rings
141:Application
125:. He used
28:Dixon rings
460:Categories
328:References
183:Ring size
72:immiscible
58:Background
446:1359-4311
311:See also
180:Property
42:and low
357:. 1949.
298:102,000
216:⁄
204:⁄
192:⁄
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304:2,965
301:24,400
290:90.73
287:90.98
284:94.63
442:ISSN
276:900
273:2378
270:3550
92:coke
434:doi
430:117
406:doi
119:ICI
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250:m
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202:1
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190:1
20:)
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