SINGLE AND MULTI-STAGE COUNTERCURRENT BUBBLE COLUMN LOOP REACTOR PERFORMANCES

The fresh water is the essence of life and its scarcity is the most threatening concern for mankind. To alleviate the worries of the existing and approaching fresh water crisis, the answer for water sustainability may lie in developing the decentralized small-scale water desalination system. Solar humidification-dehumidification (HDH) is a carrier gas based thermal technique that is ideal for a small-scale decentralized water desalination system. An innovative design approach is to use the bubble column humidifier to enhance the performance of the HDH water desalination system. Therefore, a novel multi-stage stepped bubble column humidifier is proposed that is operated through solar thermal energy as the main source of energy input. The study addresses the relation between the pressure drop variations with varying water column height at different air superficial velocities. Findings revealed that the water column height and air superficial velocity should be optimized according to the geometric features of the perforated plate in order to achieve a higher humidifier performance with a lower pressure drop. The day round performance of the humidifier is investigated in single stage, two stage, and three stage configurations. Findings show that the average day round absolute humidity at the exit of the humidifier is increased by 9 % in two-stage and 23 % in three-stage configurations compared to the single stage humidifier. One major advantages of this proposed humidifier is its ability to have a direct solar thermal heating. Subsequently, it can be located in remote areas.

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Hydrodynamics and Flow Regimes of a Multi-Stage Internal Airlift Loop Reactor

Materials Focus ◽

10.1166/mat.2014.1160 ◽

2014 ◽

Vol 3 (3) ◽

pp. 205-210

Author(s):

Shaoguo Li ◽

Tao Qi

Keyword(s):

Flow Regimes ◽

Loop Reactor ◽

Airlift Loop Reactor ◽

Multi Stage ◽

Internal Airlift Loop Reactor ◽

Airlift Loop

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Phenol removal using pulsation bubble column with inverse fluidization airlift loop reactor

Chemical Industry and Chemical Engineering Quarterly ◽

10.2298/ciceq200312028a ◽

2020 ◽

pp. 28-28

Author(s):

Ali Al-Ezzi

Keyword(s):

Bubble Column ◽

Partial Solution ◽

Integrated System ◽

Molar Ratio ◽

Ecological Problem ◽

Phenol Removal ◽

Airflow Rate ◽

Loop Reactor ◽

Inverse Fluidization ◽

Airlift Loop

Phenol and Phenolic compounds are omnipresent organics contaminants which are sent out to inbred water bodies and wastewater systems produced from the industrials processes, and it takes individual attention due to its extraordinary features such as high toxicity, carcinogenic characteristics, and ability to a gathering which affects the health of humans and the milieu. In this practical study, the integrated system of a pulsation bubble column with an inverse fluidization air loop reactor was tested to remove phenol. The test platform was made and operated with a bubble column containing at its upper end an electrical solenoid valve engaged via at least two timers, and connected to the air loop reactor consisting of an outer rectangular tube and an internal draft tube by One-way valve, where the granular activated carbon is put as an adsorbent material in the annulus region between the inner and outer tube. The effect of various parameters [molar ratio of Phenol to H2O2 (1/10, 1/15 and 1/20), airflow rate (5-20liter/min), remediation time (5-60min), initial phenol concentration (10-150) mg L-1] has been studied. Removing 90% of the contaminated phenol as a result of this study may represent a partial solution to the ecological problem.

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