Based on the experimental results obtained from the batch type continuous flow system on Valley oil, an economic analysis is conducted to provide information on cost and maintenance estimate for industrial continuous flow system.

Based on the experimental results acquired from the batch type continuous flow system on Valley oil, an analysis for economic feasibility is conducted to obtain information for the purpose of cost and maintenance estimate for industrial continuous flow system.

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This continuous desulfurization system has successful demonstrated at the treatment rate of 0.08 bpd. Moreover, this study also indicated that the treated acid catalyst, RTIL and alumina can be recycled for at least 3 times. But due to the reaction, the activity of catalyst will degrade slowly during the reaction. Theoretically, the operating cost includes mainly electricity consumption, and usage of chemicals such as hydrogen peroxide and acid catalyst.

This constantly operated and monitored desulfurization system has been successfully demonstrated at the treatment rate of 0.08 bpd. Moreover, the concerned study also indicates that the treated acid catalyst, that is, RTIL and alumina, can be recycled for at least 3 times. But due to the reaction, the activity of catalyst will degrade slowly during the reaction process. Theoretically, the cost for the operating includes chiefly the consumption of electricity and usage of chemicals such as hydrogen peroxide and acid catalyst.

 

Based on the retail price provide by Sigma-Aldrich, each chemical price is based on the large amount purchase which means the chemical cost is much cheaper compare to the lab scale price. All the price is based on 5,000 gallon daily Valley oil production. Except RTIL, because Sigma-Aldrich did not have commercialize price for RTIL, in lab retail price, it cost $300/kg. In commercialize scale, the price usually is one third price to the lab retail price, therefore, the cost of RTIL at commercialize scale can be assume $100/kg. Table QWE is the chemical cost that provide by Sigma-Aldrich.

Keeping as the foundation the retail price (provided by Sigma-Aldrich), the chemical price for each chemical item goes through a fluctuation of price proportionate to the bulk purchase. This simply means that the chemical cost used on the commercial level, is much cheaper as compared to the chemical used for lab purposes, which are certainly purchased in low amount and obviously with higher price fluctuation. It was found that the bulk (and cheaper) price relativity is based on 5,000 gallon of daily purchase of Valley oil production except for RTIL, because Sigma-Aldrich did not have commercialized price for RTIL. On the contrary, for lab usage the retail price cost is $300/kg. On the commercial scale, the price is usually three times less than the lab retail price. Therefore, the cost of RTIL on commercial level can be safely assumed to be $100/kg. Table QWE provided by Sigma-Aldrich displays the cost of chemical items.

 

Assuming RTIL and acid catalyst can be used for 20 times recycle, and alumina can be used for 100 times recycle. From section 5.3.5, the hydrogen peroxide can be 95% utilization (only oxidized OSCs), the operating cost of hydrogen peroxide used in the form of 35% aqueous solution is 7 cent/gallon of desulfurization Valley oil. Furthermore, the acid catalyst is estimated as 0.09 cent/gallon, adsorbent is 0.12 cent/gallon and RTIL is 0.23 cent/gallon of desulfurization Valley oil. The total chemical cost to desulfurization Valley oil is 53 cent. Table CCC shows the summery of economical analysis.

 

Henceforth, it is assumed that RTIL and acid catalysts can be used for 20-time recycling, and alumina can be used for 100 times recycling. It is shown from section 5.3.5 that the hydrogen peroxide can be utilized 95% (only oxidized OSCs). The operating cost of hydrogen peroxide used in the form of 35% aqueous solution is 7 cent/gallon of desulfurization Valley oil. Furthermore, the acid catalyst is estimated to be 0.09 cent/gallon; the adsorbent is 0.12 cent/gallon and RTIL is 0.23 cent/gallon of desulfurization Valley oil. The total chemical cost, thus, to desulfurization Valley oil is 53 cent. In Table CCC the illustration of the summery of economical analysis is given.

 

This batch type continuous flow system is still in its infancy. This study is working toward investigating and development its potential so that others can adopt and transform this technology for viable large-scale operation. For example, cheaper RTIL can be replace to current RTIL with lower cost. Larger scale operation can reduce the cost of hydrogen peroxide, RTIL and acid catalyst with concept of spent catalyst recycle and reuse.

 

This batch type continuous flow system is still in its infancy. The present study is aimed toward the investigation and development of its potential so that others can adapt/adopt and transform this technology for viable large-scale operations. For example, cheaper RTIL can be replaced with current RTIL with lower cost. To a great extent, large scale operations can reduce the cost of hydrogen peroxide, RTIL, and acid catalyst with concept of recycling and reusing the catalyst.

 

 

 

Chemical Row Material Calculation

Row Material Cost

Item
US$

Cost of H2O2 (35%), $/kg
0.51

Cost of Acid Catalyst 1 (99.7%) , $/kg
15.50

Cost of Acid Catalyst 2 (99%), $/kg
24.54

Cost of Alumina Oxide, $/kg
13.15

Cost of Ionic Liquid, $/kg
100

Calculation of Row Material Cost

Item
Amount (gram)
US$
H2O2
86
0.04
Acid Catalyst 1 (20X recycle)
42
0.03
Acid Catalyst 2 (20X recycle)
28
0.03
Alumina Oxide (100X recycle)
620
0.08
Ionic Liquid (20X recycle)
30
0.15

Total Cost, $/1000 gram of Valley Oil

0.34

Total Cost, $/gallon

0.52