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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue Nov 2016, 37 (6)                                     Back


nstantaneous and historical temperature effects on a-pinene

Novel approach to produce ultra low sulfur diesel fuel by

non-hydrodesulfurization process coupled with bio-desulfurization technique to meet environmental standards

 

T. Sekar1*, M. Aslam Abdullah2, F. Khushwant2 and P.Tanishq2

 1Department of Petrochemical Technology, BIT Campus, Anna University, Tiruchirappalli - 620 017, India

2Chemical Engineering Division, VIT University, Vellore - 632 014, India

*Corresponding Author E-mail: aslamset@gmail.com

 

 

 Publication Data

Paper received:

14 October 2015

 

Revised received:

26 June 2016

 

Accepted:

20 August 2016

 

Abstract

Coupling of non-hydrodesulfurization process with bio-desulfurization process can bring benefits to produce ultra-low sulfur diesel fuels. Under operating condition of 65oC and atmospheric pressure, the sulfur content present in diesel fuel decreased from 766 ?g g-1 to 7.14 ?g g-1 by non-hydrodesulfurization process using persulfate as oxidizing agent. The non-hydrodesulfurization diesel fuel was used for bio-desulfurization technique using the Rhodocuccus sp and Methylomonas methanica separately.? An experiment was conducted in two phase medium [non aqueous to aqueous ratio, 15:85 to 100:0 (i.e., 0-100% diesel)]. Microbial strains were observed to follow classic monod type growth kinetics under the present range of substrate maximum growth rate (?max = 0.096 hr-1 and 0.098 hr-1) and half saturation constant (Ks = 71 and 77 mg dm-3) for Rhodocuccus sp and Methylomonas methanica, respectively. This bio-desulfurization process was conducted in a trickle bed reactor under continuous mode that was coupled with non-hydrodesulfurization unit. The sulfur content present after bio-desulfurization technique using Rhodocuccus sp and Methylomonas methanica was 4.22 ?g g-1 and 4.06 ?g g-1, respectively. This was equivalent to 99.93% sulfur removal and was 1.78 times better than Bharat IV norms.   

 

 

 Key words

Bio-desulfurization, Non-hydrodesulfurization, Strains, Sulfur 

 

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