A Method for Calculation the Effective Adsorption Capacity of a Long Adsorption Band-Filled Column

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.953-954.1273 ◽

2014 ◽

Vol 953-954 ◽

pp. 1273-1281

Author(s):

Yan Liu ◽

Jin Xin Guo

Keyword(s):

Adsorption Capacity ◽

Calculation Method ◽

Distribution Curve ◽

Height Distribution ◽

Safety Coefficient ◽

Adsorption Column ◽

Adsorption Band ◽

Similarity Law

Long adsorption band can result in negative effective adsorption capacity; in this paper, a calculation method for effective adsorption capacity is put forward for an adsorption band with fδ>L. A safety coefficient of adsorption capacity, g, was defined, which, it was proven, could be calculated out using the similarity law between the adsorption capacity-height distribution curve of a filler and the leakage-exhaustion curve of an adsorption column.

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Hydrogen Sulfide Separation from Biogas Using Laterite Soil Adsorbent

Materials Science Forum ◽

10.4028/www.scientific.net/msf.988.144 ◽

2020 ◽

Vol 988 ◽

pp. 144-150

Author(s):

Sanggono Adisasmito ◽

Carolus Borromeus Rasrendra ◽

M. Qori Alfadhli ◽

M. Fauzan Al Ghifary

Keyword(s):

Particle Size ◽

Adsorption Capacity ◽

Room Temperature ◽

Biogas Production ◽

Separation Process ◽

High Adsorption ◽

Laterite Soil ◽

Adsorption Column ◽

Bed Height ◽

High Adsorption Capacity

Biogas production contributes as an alternative renewable energy but its emissions contain sulphuric components which needs to be separated because it can cause damage to the environment. The method used in separation is adsorption with laterite soil because the price is cheap, easy to obtain, and can occur at room temperature. The purpose of this study is to determine the conditions of the adsorbent in the adsorption column which can provide a high adsorption capacity. The separation process is carried out by flowing biogas with a flow rate of 1.5 liters/minute to the adsorption column containing laterite soil. Reducing the particle size of the adsorbent from 6 mesh to 21 mesh will increase the adsorption capacity to 2.13 times, ie from 7.3 to 14.2 mg H2S/g adsorbent. The addition of bed height from 7 cm to 12 cm will increase the adsorption capacity from 6.7 to 7.9 mg H2S/g adsorbent at 6 mesh particle size. The addition of bed height from 7 cm to 12 cm will increase the adsorption capacity from 13.5 to 15.0 mg H2S/g adsorbent at 21 mesh particle size. The laterite soil adsorbent with a particle size of 21 mesh has the highest adsorption capacity of 15.0 mg H2S/g adsorbent.

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INVESTIGATING SILVICULTURAL CHARACTERISTICS OF YEW (TAXUS BACCATA L.) STAND USING FULL-CALLIPERING IN NORTHERN FORESTS OF IRAN

International Journal of Biomathematics ◽

10.1142/s1793524512500672 ◽

2013 ◽

Vol 06 (01) ◽

pp. 1250067 ◽

Cited By ~ 1

Author(s):

MIR MOZAFFAR FALLAHCHAI ◽

SEYED ARMIN HASHEMI ◽

GASEM RAHANJAM

Keyword(s):

Distribution Curve ◽

Basal Area ◽

Diameter Distribution ◽

Maximum Height ◽

Taxus Baccata ◽

Height Distribution ◽

Annual Increment ◽

Restricted Area ◽

Northern Forests ◽

Low Rate

In this research, some of site and silvicultural characteristics of Yew stand in northern forests of Iran was studied. For this purpose, compartment number 16 of district 4 Shir-ghalaye was selected. According to research purposes, stands with an area of 20 ha were chosen in center of the compartment and was separated from map. Due to restricted area of region and according to few number of Yew trees in the stand, the full-callipering method was conducted for measuring quantitative and qualitative characteristics. In the stand diameter at breast height (D.B.H.), height and canopy diameter of all Yew trees were measured. The results showed that the diameter distribution curve and height distribution curve of Yew trees were similar to even-age forests curve. But according to average annual increment, mixture type of Yew trees in stand, diameter distribution of other species and low rate regeneration of Yew, it can be concluded that the studied Yew stand, is an uneven-age stand and because of low rate regeneration in previous years the number of young Yew trees were reduced and even-age forest curve was formed subsequently. The maximum height and diameter of Yew trees were recorded 26.8 m and 112 cm, respectively. Also, the number of trees per hectare and basal area per hectare of Yew trees were calculated 14.55 and 3.23 m2 respectively.

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Phosphorus Removed by High Calcium Fly Ash Ceramsite in Artificial Biological Filter Bed

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.80-81.298 ◽

2011 ◽

Vol 80-81 ◽

pp. 298-301

Author(s):

Shi Wei Cao ◽

Wei Chen ◽

Zhao Qian Jing

Keyword(s):

Fly Ash ◽

Adsorption Capacity ◽

Removal Rate ◽

Unit Weight ◽

Adsorption Column ◽

Biological Filter ◽

Column Adsorption ◽

High Calcium ◽

High Calcium Fly Ash ◽

Filter Bed

Fly ash Ceramsite, Artificial Biofilter Bed, Dry Umbrella Bamboo, Phosphorus Removal Abstract: High calcium fly ash ceramsite had tremendous surface area and porosity, the unit weight of fly ash adsorption column adsorption capacity of ceramsite was 0.032mg•g-1, which was higher than normal calcium fly ash ceramsite adsorption capacity. The fix adsorption column tests showed that the adsorption capacity got stable when the contact time was 3 hours and the saturation adsorption was got at the ninth hour. The result of subsequent tests showed that the phosphorus resolve would not occur if the adsorption condition doesn’t change. The pilot test with actual wastewater was done and the results showed that the PO43- concentrations of effluent were less than 0.2mg•L-1 and the removal rate reached 90%, dry umbrella bamboo was the most suitable aquatic plant. The artificial biological filter process monitoring showed that the phosphorus of the sewage was mainly removed in the front of artificial biological filter bed.

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WAVE HEIGHT DISTRIBUTION AROUND PERMEABLE BREAKWATERS

Coastal Engineering Proceedings ◽

10.9753/icce.v17.12 ◽

1980 ◽

Vol 1 (17) ◽

pp. 12

Author(s):

Shintaro Hotta

Keyword(s):

Wave Height ◽

Calculation Method ◽

Field Observation ◽

Approximate Calculation ◽

Superposition Principle ◽

Phase Lag ◽

Height Distribution ◽

Wave Height Distribution

A phase lag phenomenon in which waves are delayed in transmission through a permeable breakwater was considered in an approximate calculation method using the superposition principle of Sommerfeld. Experimental verifications were carried out for a semi-infinite permeable breakwater. In addition, a field observation of wave height distribution around a small detached breakwater is reported.

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Calculation Method for Size Distribution Curve of Aerosol Fitted by Spline Function

Journal of Environmental Conservation Engineering ◽

10.5956/jriet.16.339 ◽

1987 ◽

Vol 16 (5) ◽

pp. 339-339 ◽

Cited By ~ 1

Author(s):

Mitsuhiro MATSUMOTO ◽

Naotaka UEDA ◽

Yoshitaka NISHIKAWA

Keyword(s):

Size Distribution ◽

Calculation Method ◽

Spline Function ◽

Distribution Curve

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IONIZING POWER OF COSMIC RAY PARTICLES AT SEA LEVEL

Canadian Journal of Physics ◽

10.1139/p51-054 ◽

1951 ◽

Vol 29 (6) ◽

pp. 495-504 ◽

Cited By ~ 1

Author(s):

S. D. Chatterjee

Keyword(s):

Sea Level ◽

Distribution Curve ◽

Pulse Height ◽

Cosmic Ray ◽

Relativistic Electrons ◽

Height Distribution ◽

Soft Component ◽

Pulse Height Distribution ◽

Counter Telescope ◽

Number Of Particles

Using a proportional counter telescope arrangement, experiments have been carried out at sea level to explore the nature and ionizing power of particles in the soft component of cosmic radiation and those produced under 1.8 cm. and 20 cm. of lead. The results indicate a preponderance of relativistic electrons in the soft component and under 20 cm. of lead. Under 1.8 cm. of lead there is some disagreement with the calculated pulse height distribution curve but this can be attributed to the production of showers in the lead. These showers would obscure the presence of a small number of particles of unusually high ionizing power, if such exist.

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