Religion & Spirituality

Bio-CNG production potential from locally available biomass

Description
Bio-CNG production potential from locally available biomass
Published
of 4
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Share
Transcript
  Sharan Reetika, V. V Sasane; International Journal of Advance Research, Ideas and Innovations in Technology © 2018, www.IJARIIT.com  All Rights Reserved Page | 1393   ISSN: 2454-132X Impact factor: 4.295  (Volume 4, Issue 2) Available online at: www.ijariit.com  Bio-CNG production potential from locally available biomass  Reetika Sharan reetika.sharan@gmail.com  Dilkap Research Institute of Engineering and  Management Studies, Mumbai, Maharashtra Sasane V. V sasanevrushalicivil@sanjivani.org.in Sanjivani College of Engineering, Kopargaon,  Maharashtra ABSTRACT Today Mumbai is facing problem of waste accumulation in different areas and limitation of waste disposal sites. These wastes  are dumped in the form of big heaps. The degradation of these waste starts after few days. The process of degradation is aerobic  at outer layer and anaerobic at inner layers. Due to these reactions, putresible gases are come out and causes a health hazard. The Bio-CNG plant gives the best solution for this problem. It uses the vegetable waste as raw material and converts it into a  high calorific value fuel. Hence it minimizes the waste accumulation and also solves the problem of energy crisis at the same  time. In this study 6kg waste is digested under controlled environment condition n a mesophilic temperature range (30°C-45°C)  for 26 days to obtain Biogas. The Biogas so obtained contains CH       , CO    , H    S, and Moisture content. The presence of CO    , H    S,  and Moisture content in Biogas is considered as impurities as it reduces the calorific value of fuel and hence removed using  three scrubber units to obtain the composition of natural gas.These three scrubber units contained Sodalime, Silicagel, and Tri-ethelene glycol to remove CO    , H    S and moisture content respectively. The Bio-CNG obtained above contains more than 85% of CH    which has high calorific fuel value. These Bio-CNG can be used as automobile fuel, for cooking as well as for  power generation. It can also consider as alternative fuel option against the limited stock of conventional fuels like coal,  petroleum etc in future. Keywords:    Biogas, Bio-CNG, Scrubbers, Mesophilic Temperature, CO ₂  , H  ₂ S. 1. INTRODUCTION Bio-CNG is a compressed gas which is produced by purification of bio gas. This bio gas is produced by biomass digested in a digestor. Bio-gas has several impurities so it cannot be used for other application except cooking. So in bio-cng plant gas purification units are assembled to remove unwanted gases from bio-gas. Biogas contains CO 2 , H 2 S, and moisture as a major impurity. These gases when present in considerable amount can cause corrosion. They can also reduce calorific value of Biomass resources such as cattle dung, agriculture wastes, and other organic wastes have been one of the main energy sources for the mankind since the dawn of civilization. There is a vast scope to convert these energy sources into biogas. Biogas production is a clean low carbon technology for efficient management and conversion of fermentable organic wastes into clean cheap & versatile fuel and bio/organic manure. It has the potential for leveraging sustainable livelihood development as well as tackling local and global land, air and water pollution. Biogas obtained by anaerobic digestion of cattle dung and other loose & leafy organic matters/ biomass wastes can be used as an energy source for various applications namely, cooking, heating, space cooling/ refrigeration, electricity generation and gaseous fuel for the vehicular application. 2. MATERIAL AND METHOD Methodology  Bio-CNG plant consists of the following unit:- 1) Biogas Digestor 2) Scrubber unit for CO2 and H2S 3) Dehydration unit 4) Collection unit  Sharan Reetika, V. V Sasane; International Journal of Advance Research, Ideas and Innovations in Technology © 2018, www.IJARIIT.com  All Rights Reserved Page | 1394   Biogas digestor unit Bio-CNG unit specification depends on composition depend on the composition of Biogas. Initially, 6kg of bio mass has digested. The digestor is made of thermoplastic material. At the left side of the digester, a perforated column is fitted .the size of perforation is 6mm and the capacity of digestor is 6.5KG. A 1Psi pressure gauge is fitted along with a two-way brass nozzle. This gauge is used to measure the pressure inside the digestor and when pressure increase from 1psi, gas released. One stirrer is fitted at the bottom for mixing of biomass.it is made of steel. Fig 1.1 Biogas Digestor Unit Fig 1.2 CO2 Scrubber unit Fig 1.3 H2S Scrubber unit Fig 1.4 Dehydration unit  Sharan Reetika, V. V Sasane; International Journal of Advance Research, Ideas and Innovations in Technology © 2018, www.IJARIIT.com  All Rights Reserved Page | 1395   Scrubber Unit  It consists of two scrubbers: a) CO 2  scrubber b) H 2 S scrubber a) CO 2  Scrubber: It is a cylindrical container of 1litre capacity. This scrubber unit is made of polymer and packed with the packed bed made of sodalime pallets and perforated steel scrubber. Steel scrubber packed at top and bottom is made of steel and have some fine perforation. Sodalime pallet used here is of pink colour and can changed colour after saturation with CO2 and turns white. Two nozzles of brass are used at inlet and outlet. At inlet, this scrubber is connected to bio gas digestor and outlet it is connected to H2S scrubber using rubber pipe. b) H 2 S Scrubber:- It is a cylindrical container of 1litre capacity made of polymer. This scrubber unit is packed with single media bed made of silica gel granules. Silica gel is white granules used for H2S removal. It has also dehydration property so it can remove moisture present in the biogas. Two nozzles of brass are used at inlet and outlet. At inlet, it is connected to CO2 scrubber and at outlet, it is connected to dehydration unit. Dehydration unit It is a cylindrical container of 1litre capacity made of polymer. This dehydration unit is packed with perforated iron ring submerged in Tri ethylene glycol. This unit is set to remove moisture from biogas. Two nozzles of brass are used at inlet and outlet. At inlet, this unit is connected to H2S scrubber and at outlet, it is connected to CNG collector bag using rubber pipes. 3. RESULT AND DISCUSSION Table 1.1 composition of biogas on digestor Table 1.2 composition on the co2 scrubber Table 1.3 composition on the H2S scrubber Table 1.4 Composition of Bio-CNG Gases % Amount CH4 58 CO2 37 H2S 100ppm Moisture Content 3 Gases % Amount CH4 63.28 CO2 18 H2S 78ppm Moisture Content 2.99 Gases % Amount CH4 81.45 CO2 16 H2S 42 Moisture content 1.41 Gases % Amount CH4 88.96 CO2 10.6 H2S 42` Moisture Content 0.98  Sharan Reetika, V. V Sasane; International Journal of Advance Research, Ideas and Innovations in Technology © 2018, www.IJARIIT.com  All Rights Reserved Page | 1396    Discussion of Result obtained on Bio-digestor unit:- Methane digestor used in this process is contained with a perforated column which is welded at the top. So there is no leakage at the digestor outlet. But temperature and PH are not that much in control so there is less percentage of methane obtained . Result obtained on CO 2  Scrubber unit:- As CO 2  scrubber, packed with sodalime pallets and perforated kitchen steel scrubber, CO2 can be removed satisfactorily but some nozzles. Methane composition is slightly less due to the absence of nitrate removing unit. Some H2S is also removed in this unit. Some losses occur due unprofessional gas packing at outlet Result obtained after passing from H2S Scrubber:- Silica gel scrubber is used for H2S removal. Silica gel has also dehydrating properties. Which can remove moisture from biogas. But unprofessional packing and changing climatic condition leads to some less methane obtained after this scrubber. Result obtained after passing from Dehydration unit:-  As a moderately dry biomass is used for the process. So water content is lower than normal. Ethelene glycol unit is used for removal of water. As due point is not located properly and some leakage at the outlet valve occure so methane % obtained is less from the expectation. Some CO2 may take part in hydrolysis reaction and get reduced.   4. CONCLUSION    To implement this bio-cng plant can provide a good option. This plant consist of four basic units. These units produce biogas and at the same time, it purifies it and then collected in CNG cylinders.    The first unit of this bio-cng plant consists of bio-gas plant which digests the composite biomass into bio-gas under anaerobic condition. The bio-gas produced in the digestor consist of mehane, CO 2 , H2S & moisture. The presence of CO2, H2S, and moisture cause the low calorific value of biogas fuel. They also cause corrosion to pipe fittings used in the process of energy generation.    To remove these impurity from bio-gas and increase calorific value of bio-fuel a purification unit is installed. This unit consist of two scrubber unit for CO2 & H2S removal and one dehydration unit for moisture removal.    The two scrubber unit consists of packed bed and steel scrubbers at top and bottom. The first scrubber unit is packed with sodalime pallets and steel scrubbers at the top and the bottom. This unit is used for CO2 removal from bio-gas. The second scrubber unit consist of silica jel granuals and steel scrubbers at the top and the bottom. This unit removes H2S from bio-gas.    The dehydration unit consist of a absorbent packed between fine mesh steel scrubber. The absorbent used here is tri ethelene glycol. This unit removes moisture` from bio-gas.    After passing through these purification unit biogas composition mainly consist of methane which has high calorific value as a fuel. 5. REFERENCES [1] Venugopalan.V, Dr Balasundram.N, Hemalatha.S (2017) “ Comparitive Study on Biogas Production from Cow dung, food waste and organic wastes”International journal of civil engineering and technology, Vol 8 issue 2 page 100 -106. [2] Kader Faisal, Abdullah Hil Baky,Muhammad Anzmul Hasan Khan,Habibullah Amin Chowdhury,(2015) “Product ion of Biogas by Anaerobic Digestion of food wwaste and process simulation” American Journal of Mechanical engineering ,Vol.3 No.3 pp79-83. [3] Kumar Neeraj ,dureja Gourav,Kamboj Sandeep,(2014), “To make a biogas energy from different sourses & creating awareness between human being- Case Study” ,International Journal of Modern Engineering Research, Vol.4 Iss.3 pp 1-6. [4] Abimbola Ojikutu , Olumide Osokoya,(2014),”Evaluation of Biogas Production from Food Waste” The International Of Engineering And Science, Vol.3 Iss.01 pp 1-7 [5] Onwuliri FC, Onylimba IA ,Nwaukwu IA,(2013),”Generation of Biogas from Cow Dung”, Bioremedation and Biodegradation ,University of Jos Nigeria, special Iss.18:002 . [6] Pick Daniel, Dieterich Martin, Heintschel Sebasti an,(2012),”Biogas Production Potential from Economically Usable Green Waste” ,Sustainability Journal, Vol.4 pp.682-702.

WORDS

Nov 25, 2018

airasia pshy

Nov 25, 2018
Search
Similar documents
View more...
Tags
Related Search
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks