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        <full_title>International Journal of Environmental Engineering and Development</full_title>
        <issn media_type="electronic">2945-1159</issn>
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        <publication_date media_type="online">
          <month>06</month>
          <day>09</day>
          <year>2026</year>
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          <month>06</month>
          <day>09</day>
          <year>2026</year>
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          <volume>4</volume>
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        <titles>
          <title>Compressed-air Conversion of Piston Engines for Zero-Carbon Emissions: Exploring the Applicability of Modification</title>
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          <person_name sequence="first" contributor_role="author">
            <given_name>Christos</given_name>
            <surname>Papakitsos</surname>
            <affiliations>
              <institution>
                <institution_name>Hellenic Army Academy Vari, Attica GREECE</institution_name>
              </institution>
            </affiliations>
          </person_name>
          <person_name sequence="additional" contributor_role="author">
            <given_name>Dimitrios</given_name>
            <surname>Bourlekas</surname>
            <affiliations>
              <institution>
                <institution_name>Dept. of Industrial Design and Production Engineering University of West Attica Aegaleo, Athens GREECE</institution_name>
              </institution>
            </affiliations>
          </person_name>
          <person_name sequence="additional" contributor_role="author">
            <given_name>Evangelos</given_name>
            <surname>Papakitsos</surname>
            <affiliations>
              <institution>
                <institution_name>Dept. of Industrial Design and Production Engineering University of West Attica Aegaleo, Athens GREECE</institution_name>
              </institution>
            </affiliations>
          </person_name>
          <person_name sequence="additional" contributor_role="author">
            <given_name>Dionysios E.</given_name>
            <surname>Mouzakis</surname>
            <affiliations>
              <institution>
                <institution_name>Hellenic Army Academy Vari, Attica GREECE</institution_name>
              </institution>
            </affiliations>
          </person_name>
          <person_name sequence="additional" contributor_role="author">
            <given_name>Theodore</given_name>
            <surname>Ganetsos</surname>
            <affiliations>
              <institution>
                <institution_name>Dept. of Industrial Design and Production Engineering University of West Attica Aegaleo, Athens GREECE</institution_name>
              </institution>
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        <jats:abstract xml:lang="en"><jats:p>Electric mobility is widely featured as a solution to zero-carbon transportations. Nevertheless, this approach poses two major problems internationally; the first one is the cost of replacing the vast number of internal combustion engines globally; the second one is that efficient electric motors require a substantial amount of Neodymium, which is a rear earthly material, especially considering the first problem. Therefore, regarding zero-carbon transportations, a technically feasible and economical solution would be the conversion of existing internal combustion engines in order to function with zero-carbon emissions. Accordingly, two such historical cases are reviewed, the compressed-air conversions of existing piston engines and the inert gas chambers, while the mechanical process of converting a small two-stroke engine is presented, to explore the applicability of such modification.</jats:p></jats:abstract>
        <publication_date media_type="online">
          <month>10</month>
          <day>08</day>
          <year>2026</year>
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        <publication_date media_type="print">
          <month>10</month>
          <day>08</day>
          <year>2026</year>
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        <pages>
          <first_page>58</first_page>
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          <item_number item_number_type="article_number">6</item_number>
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        <citation_list>
          <citation type="journal_article" key="ref1"><unstructured_citation>Neal B., Compressor Unit, US Patent 2,030,759, 11th Feb. 1936.</unstructured_citation></citation>
          <citation type="journal_article" key="ref2"><unstructured_citation>Kelly P.J., A Practical Guide to Free-Energy Devices, Version: 34.5, https://www.researchgate.net/publication/358710193_Practical_Guide_to_%27Free-Energy%27_Devices_Version_348, 2019.</unstructured_citation></citation>
          <citation type="journal_article" key="ref3"><unstructured_citation>Bourlekas D., Conversion of an internal combustion engine for operation with compressed air [in Greek], Dissertation, Department of Industrial Design &amp; Production Engineering, University of West Attica, Aegaleo Athens, Greece, 2023.</unstructured_citation></citation>
          <citation type="journal_article" key="ref4"><unstructured_citation>Rogers L.K. Sr., Supercharger for automobile engines, US Patent 4,693,669, 15th September 1987.</unstructured_citation></citation>
          <citation type="journal_article" key="ref5"><unstructured_citation>Sterling D.A., Nova Neal Compression Engine, https://www.rexresearch.com/neal/neal.htm,2013.</unstructured_citation></citation>
          <citation type="journal_article" key="ref6"><unstructured_citation>Hamilton T., The Air Car Preps for Market, MIT Technology Review, January 16, 2008. https://www.technologyreview.com/2008/01/16/222340/the-air-car-preps-for-market/</unstructured_citation></citation>
          <citation type="journal_article" key="ref7"><unstructured_citation>Malay J., Ritik J., Harshvardhan P., Yash P., Design &amp; Working of Compressed Air Engine, International Research Journal of Engineering and Technology, Vol.08, No.05, 2021, pp. 2399-2401.</unstructured_citation></citation>
          <citation type="journal_article" key="ref8"><unstructured_citation>Saivardhan B., Compressed Air Engine, IOSR Journal of Mechanical and Civil Engineering, Vol.14, No.4, 2017, pp. 01–05. doi: 10.9790/1684-1404070105</unstructured_citation></citation>
          <citation type="journal_article" key="ref9"><unstructured_citation>Mahato A.K., Sharma D., Bastakoti D., Shrestha M.N., Bhatt N., Koirala R., Design and development of compressed air engine, Journal of Engineering Issues and Solutions, Vol.2, No.1, 2023, pp. 13-25. doi: 10.3126/joeis.v2i1.50326</unstructured_citation></citation>
          <citation type="journal_article" key="ref10"><unstructured_citation>Tian H., Zhang H., Yin Z., Liu Y., Zhang X., Xu Y., Chen H., Advancements in compressed air engine technology and power system integration: A comprehensive review, Energy Reviews, Vol.2, 2023, p. 100050. doi: 10.1016/j.enrev.2023.100050</unstructured_citation></citation>
          <citation type="journal_article" key="ref11"><unstructured_citation>Papp J., Inert Gas Fuel, Fuel Preparation Apparatus and System for Extracting Useful Work from The Fuel, US Patent 4,428,193, 31st January 1984.</unstructured_citation></citation>
          <citation type="journal_article" key="ref12"><unstructured_citation>Rohner J., PlasmERG Inc., Plasmic Transition Process Motor. US Patent Application 2011/0113772 A1, 19th May 2011.</unstructured_citation></citation>
          <citation type="journal_article" key="ref13"><unstructured_citation>Britt R.G., Atomic Expansion Reflex Optics Power Source (AEROPS) Engine, US Patent 3,977,191, 31st August 1976.</unstructured_citation></citation>
          <citation type="journal_article" key="ref14"><unstructured_citation>Klostermann H., Internal Explosion Engine and Generator Using Non-combustible Gases, US Patent 7,076,950, 18th July 2006.</unstructured_citation></citation>
          <citation type="journal_article" key="ref15"><unstructured_citation>Energy Education, Two stroke engine, Available online at https://energyeducation.ca/encyclopedia/Two_stroke_engine.</unstructured_citation></citation>
          <citation type="journal_article" key="ref16"><unstructured_citation>Autoevolution, HONDA C50 Super Cub (1966-1980), Available online at https://www.autoevolution.com/moto/honda-c50-super-cub-1966.html#aeng_honda-c50-super-cub-1966-49.</unstructured_citation></citation>
          <citation type="journal_article" key="ref17"><unstructured_citation>Evoke Classics, Honda Cub C50, C70 and C90, Available online at https://www.evoke-classics.com/buyers-guides/honda-cub-c50-c70-c90.</unstructured_citation></citation>
          <citation type="journal_article" key="ref18"><unstructured_citation>Boats.net, 2-Stroke vs 4-Stroke Outboard Motors: Pros &amp; Cons, Available online at https://www.boats.net/blog/2-stroke-vs-4-stroke-outboards-pros-cons.</unstructured_citation></citation>
          <citation type="journal_article" key="ref19"><unstructured_citation>How A Car Works, Pistons, Available online at https://www.howacarworks.com/pistons.</unstructured_citation></citation>
          <citation type="journal_article" key="ref20"><unstructured_citation>Car And Driver, Horsepower vs. Torque: What’s the Difference?, Available online at https://www.caranddriver.com/news/a15347872/horsepower-vs-torque-whats-the-difference/</unstructured_citation></citation>
          <citation type="journal_article" key="ref21"><unstructured_citation>RideApart, How a dyno measures horsepower, Available online at https://www.rideapart.com/news/257915/how-a-dyno-measures-horsepower/</unstructured_citation></citation>
          <citation type="journal_article" key="ref22"><unstructured_citation>Edmunds, Horsepower: Gross vs. Real-World, Available online at https://www.edmunds.com/car-technology/horsepower-gross-vs-real-world.html</unstructured_citation></citation>
          <citation type="journal_article" key="ref23"><unstructured_citation>Dundon Motorsports, How to Read A Dyno Graph, Available online at https://www.dundonmotorsports.com/blogs/articles/how-to-read-a-dyno-graph</unstructured_citation></citation>
          <citation type="journal_article" key="ref24"><unstructured_citation>Power Bicycle, Motorized Bike Clutch Repair, Available online at https://power-bicycle.com/tuning/clutch/</unstructured_citation></citation>
          <citation type="journal_article" key="ref25"><unstructured_citation>Digital Citizen, 30 or 60 fps? What’s best for smartphone video recording?, Available online at https://www.digitalcitizen.life/30-60-fps-best-for-smartphone-video-recording/</unstructured_citation></citation>
          <citation type="journal_article" key="ref26"><unstructured_citation>Odukomaiya A., Abu-Heiba A., Gluesenkamp K.R., Abdelaziz O., Jackson R.K., Daniel C., Graham S., Momen A.M., Thermal analysis of near-isothermal compressed gas energy storage system, Applied Energy, Vol.179, 2016, pp. 948–960. doi: 10.1016/J.APENERGY.2016.07.059</unstructured_citation></citation>
          <citation type="journal_article" key="ref27"><unstructured_citation>Evrin R.A., Dincer I., Experimental investigation of a compressed air vehicle prototype with phase change materials for heat recovery, Energy Storage, Vol.2, No.5, 2020, p. e159. doi: 10.1002/est2.159</unstructured_citation></citation>
          <citation type="journal_article" key="ref28"><unstructured_citation>Miliarakis D., Giachos I., Drosos C., Papakitsos E., Papoutsidakis M., Laskaris N., Enquiring the Construction and Control of Unmanned Aerial Vehicles for Environmental-Friendly Applications, WSEAS Transactions on Systems and Control, Vol.20, 2025, pp. 198-208. doi: 10.37394/23203.2025.20.22</unstructured_citation></citation>
          <citation type="journal_article" key="ref29"><unstructured_citation>Τsatsaris A., Giachos I., Papakitsos C., Papakitsos E., Laskaris N., Mouzakis D., A Novel Application of an Unmanned Ground Vehicle for Defense Missions: Construction and Control Issues, Engineering World, Vol.7, 2025, pp. 60-69. doi: 10.37394/232025.2025.7.7</unstructured_citation></citation>
          <citation type="journal_article" key="ref30"><unstructured_citation>Simplify3D, Ultimate 3D Printing Materials Guide, Available online at https://www.simplify3d.com/resources/materials-guide/</unstructured_citation></citation>
          <citation type="journal_article" key="ref31"><unstructured_citation>3D Print Wiki, 3D Printing Materials Guide, Available online at https://3dprintwiki.com/materials</unstructured_citation></citation>
          <citation type="journal_article" key="ref32"><unstructured_citation>Andritsos N., Energy and Environment [in Greek], University of Thessaly, Available online at http://archive.eclass.uth.gr/eclass/modules/document/file.php/MHXB122/Enotita_5.pdf</unstructured_citation></citation>
        </citation_list>
      </journal_article>
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