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Academician

NURAY OKTAR

Profesör

Gazi Üniversitesi Mühendislik Fakültesi Kimya Mühendisliği Bölümü

Research topics OpenAlex
  1. Ana Dal Mühendislik Temel Alanı
  2. Yan Dal Kimya Mühendisliği
Keywords YÖKSİS
Articles 44 YÖKSİS 44 · OpenAlex 0 Total citations 1,005 h-index 18 · OpenAlex OpenAlex coverage %80 matched 35 / 44 Q1 articles 20 Scopus · WoS Q1 12 Best field rank #1,643 / 24,860 Main field · top 6.6% Co-authors 63 13 Turkish institutions

Citation impact

Citation counts of the articles matched in OpenAlex, citing publications from Crossref and the Stanford/Elsevier list. Sources are shown separately and never added up.

OpenAlex YÖKSİS articles matched in OpenAlex: 35 + YÖKSİS · co-author record: 3
h-index 18 Percentile in Türkiye: 96 #153 of 2,201 at their university by h-index
i10-index
24
Total citations
1,005
Top 4.9% in Türkiye
Per article
26.4
FWCI
1.17
1.00 = world average
World top 1%
1
World top 10%
2

Most cited articles

  1. Esterification of free fatty acids in waste cooking oils WCO Role of ion exchange resins 2008 world top 1% 288 citations
  2. Use of biodiesel by product crude gylcerol as the carbon source for fermentation process by recombinant Pichia pastoris 2008 world top 10% 77 citations
  3. Catalytic performances of Ni and Cu impregnated MCM-41 and Zr-MCM-41 for hydrogen production through steam reforming of acetic acid 2019 52 citations
How is this computed?

h-index and citations are computed from the citation counts of this academic’s YÖKSİS articles matched in OpenAlex (not Google Scholar, WoS or Scopus). Unmatched articles are not included. 3 articles (13 citations) tagged with this academic’s YÖK author id in co-authors’ YÖKSİS records count only towards citations, h-index and i10; article counts, percentiles and rankings use their own YÖKSİS list.

Citing publications Crossref 183 publications citing 35 DOI-bearing articles · 21 Türkiye-affiliated
  • 2015 1
  • 2018 2
  • 2019 44
  • 2020 55
  • 2021 49
  • 2022 19
  • 2025 5
  • 2026 8
  1. Synergistic Mn–Ce modification of mesoporous silica microspheres for deoxygenation of bio-oil to biofuel TR Birce Pekmezci Karaman et al. · Journal of the Energy Institute · 2026 · cites 3 articles of this academic
  2. DOI 10.1039/d5nj03780h 2026
  3. DOI 10.1016/j.apcatb.2025.126283 2026 · cites 2 articles of this academic
  4. DOI 10.1016/j.joei.2025.102417 2026
  5. DOI 10.1016/j.aquaculture.2025.743454 2026
  6. DOI 10.1016/j.inoche.2025.115721 2026
  7. DOI 10.1016/j.renene.2025.124964 2026
  8. DOI 10.1016/j.rser.2025.116480 2026
  9. DOI 10.4028/p-27ar1w 2025
  10. DOI 10.3390/pr13113491 2025
  11. DOI 10.1016/j.surfin.2025.108067 2025
  12. DOI 10.18311/jmmf/2025/50312 2025
  13. DOI 10.1021/acs.est.5c12190 2025
  14. Analysis of combustion and emissions characteristics of a DI diesel engine fuelled with diesel/biodiesel/glycerol tert-butyl ethers mixture by altering compression ratio and injection timing TR Abdülvahap Çakmak et al. · Fuel · 2022
  15. Nickel-based alumina supported catalysts for dry reforming of biogas in the absence and the presence of H2S: Effect of manganese incorporation TR Hale Akansu et al. · Catalysis Today · 2022
  16. DOI 10.1016/j.cclet.2021.09.056 2022
  17. DOI 10.1016/j.apcata.2021.118476 2022
  18. DOI 10.1016/j.jmrt.2022.02.033 2022
  19. DOI 10.1016/j.fuel.2022.123698 2022
  20. DOI 10.1016/j.lwt.2021.112951 2022
  21. DOI 10.3390/en15030920 2022 · cites 2 articles of this academic
  22. DOI 10.1016/j.jece.2022.107542 2022
  23. DOI 10.1016/j.gce.2021.08.004 2022
  24. DOI 10.1016/j.gee.2020.08.009 2022
  25. DOI 10.1016/j.cej.2021.134445 2022
  26. DOI 10.1016/j.ijhydene.2021.02.152 2022
  27. DOI 10.2139/ssrn.3998958 2022
  28. DOI 10.1016/j.jiec.2022.02.045 2022
  29. DOI 10.1039/d1re00561h 2022
  30. DOI 10.1016/j.ijhydene.2021.11.076 2022

Showing the 30 most recent.

Where does this list come from?

Extracted from the reference lists in Crossref’s public March 2026 data file; 20.3% of the file has been processed, so the list may be incomplete. Crossref citations are never added to or compared with the OpenAlex citation counts; the two sources have different coverage.

Field ranking

Position in the main-field, side-field and keyword cohorts by YÖKSİS article score; each card opens that ranking.

YÖKSİS ?
Keyword rankings 1

Works 44

YÖKSİS and OpenAlex records: index distribution, journals published in, a filterable article list and the other output types.

Indexes and citation percentiles

?
TR Index 6 articles
OpenAlex citation percentile
Top 1%1
Top 10%2
Avg · n 35 %60.4
Other counts

Scopus (SJR)

  • YÖKSİS rows 39

WoS (JCR)

  • YÖKSİS rows 40

Articles

Articles with YÖKSİS and OpenAlex source split; narrow by quartile or TR Index.

44articles

Journals with publications

24 journals

Narrow down

Scopus (SJR)
Q120 Q214 Q35 Q40
WoS (JCR)
Q112 Q214 Q39 Q45
TR Index
6articles

Article list

  1. 2025 Outperformance of CaO-incorporated alumina-supported Pd catalysts in methanol decomposition Research on Chemical Intermediates DOI 10.1007/s11164-025-05652-y YÖKSİS SJR Q2 JCR Q2 OpenAlex 37.6%
  2. 2025 Influence of synthesis parameters on the structural formation of mayenite via the citrate sol-gel method Turkish Journal of Chemistry DOI 10.55730/1300-0527.3746 YÖKSİS TR Index SJR Q3 JCR Q3 OpenAlex 7.5%
  3. 2024 Hydrogen Production from Formic Acid Using KIT-6 Supported Non-Noble Metal-Based Catalysts CHEMPLUSCHEM DOI 10.1002/cplu.202400665 YÖKSİS SJR Q2 JCR Q2 OpenAlex 46.6%
  4. 2024 Effect of the amount and type of active metal and its impregnation sequence on bio-fuel production APPLIED CATALYSIS A-GENERAL DOI 10.1016/j.apcata.2024.119850 YÖKSİS SJR Q2 JCR Q2 OpenAlex 64.7%
  5. 2024 On-site hydrogen-rich gas production from diesel: A comprehensive study on catalyst development with nickel and diverse metal oxides supported on alumina APPLIED CATALYSIS A-GENERAL DOI 10.1016/j.apcata.2024.119940 YÖKSİS SJR Q2 JCR Q2 OpenAlex 28.2%
  6. 2024 Catalytic Performances of Ni-containing Mesoporous TUD-1 Catalysts in Steam Reforming of Acetic Acid CATALYSIS LETTERS DOI 10.1007/s10562-024-04621-1 YÖKSİS SJR Q2 JCR Q3 OpenAlex 22.6%
  7. 2023 Decomposition of formic acid over Ni-containing SiO2 catalysts synthesized by various one-pot synthesis routes Springer Science and Business Media LLC DOI 10.1007/s11144-023-02484-y YÖKSİS SJR Q3 JCR Q4 OpenAlex 42.8%
  8. 2023 Catalytic upgrading of bio-oil model mixtures in the presence of microporous HZSM-5 and γ-Al2O3 based Ni, Ta and Zr catalysts Elsevier BV DOI 10.1016/j.fuel.2023.128870 YÖKSİS SJR Q1 JCR Q1 OpenAlex 77.6%
  9. 2022 Heteropolyacid Incorporated Bifunctional Core-Shell Catalysts for Dimethyl Ether Synthesis from Carbon Dioxide/Syngas Catalysts DOI 10.3390/catal12101102 YÖKSİS SJR Q2 JCR Q2 OpenAlex 63.4%
  10. 2022 Dimethyl ether from syngas and effect of CO2 sorption on product distribution over a new bifunctional catalyst pair containing STA@SBA-15 Fuel DOI 10.1016/j.fuel.2022.125607 YÖKSİS SJR Q1 JCR Q1 OpenAlex 69.6%
  11. 2021 Comparison of microwave and conventionally heated reactor performances in catalytic dehydrogenation of ethane International Journal of Hydrogen Energy DOI 10.1016/j.ijhydene.2020.11.067 YÖKSİS SJR Q1 JCR Q2 OpenAlex 82.5%
  12. 2021 Coke-resistance enhancement of mesoporous γ-Al2O3 and MgO-supported Ni-based catalysts for sustainable hydrogen generation via steam reforming of acetic acid International Journal of Hydrogen Energy DOI 10.1016/j.ijhydene.2021.09.084 YÖKSİS SJR Q1 JCR Q2 OpenAlex 77.1%
  13. 2021 Experimental Study on the Liquid-Phase Adsorption Equilibrium of n-Butanol over Amberlyst (TM) 15 and Contribution of Diffusion Resistances Chemical Engineering & Technology DOI 10.1002/ceat.202100253 YÖKSİS SJR Q2 JCR Q3 OpenAlex 38.4%
  14. 2021 MESOPOROUS ALUMINOSILICATE SUPPORTED CATALYSTS IN ALTERNATIVE FUEL HYDROGEN PRODUCTION Konya Journal of Engineering Sciences DOI 10.36306/konjes.982692 YÖKSİS TR Index OpenAlex 21.9%
  15. 2020 Tungstophosphoric acid incorporated hierarchical HZSM-5 catalysts for direct synthesis of dimethyl ether INTERNATIONAL JOURNAL OF HYDROGEN ENERGY DOI https://www.sciencedirect.com/science/article/pii/S0360319920325763 YÖKSİS SJR Q1 JCR Q2
  16. 2020 Steam reforming of acetic acid in the presence of Ni coated with SiO2 microsphere catalysts International Journal of Hydrogen Energy DOI 10.1016/j.ijhydene.2020.05.146 YÖKSİS SJR Q1 JCR Q2 OpenAlex 59.7%
  17. 2020 Bifunctional Silicotungstic Acid and Tungstophosphoric Acid Impregnated Cu-Zn-Al & Cu-Zn-Zr Catalysts for Dimethyl Ether Synthesis from Syngas CATALYSIS LETTERS DOI https://link.springer.com/article/10.1007/s10562-020-03171-6 YÖKSİS SJR Q2 JCR Q3
  18. 2019 Catalytic Performances of Bi-Metallic Ni-Co Catalysts in Acetic Acid Steam Reforming Reaction: Effect of Mg Incorporation International Journal of Chemical Reactor Engineering DOI 10.1515/ijcre-2018-0164 YÖKSİS SJR Q3 JCR Q3 OpenAlex 32.7%
  19. 2019 Catalytic performances of Ni and Cu impregnated MCM-41 and Zr-MCM-41 for hydrogen production through steam reforming of acetic acid CATALYSIS TODAY DOI 10.1016/j.cattod.2018.06.004 YÖKSİS SJR Q1 JCR Q1 OpenAlex 88.1%
  20. 2019 Production of value-added chemicals from esterification of waste glycerol over MCM-41 supported catalysts Green Processing and Synthesis DOI 10.1515/gps-2018-0034 YÖKSİS SJR Q2 JCR Q3 OpenAlex 77.5%

Projects 43 See all (43) →

  1. 2022 Karbondioksit Metanasyonu İle Biyogaz İçeriğinin Zenginleştirilmesi -Tübitak 1001 · Tamamlandı 2022-10-01 – 2025-04-01
  2. 2020 Biyo-Yakıt Üretiminde Kullanılacak Karbon Oluşumuna Dayanıklı Nitelikli Katalizörlerin Geliştirilmesi Ve Uygulamaları -Tübitak 1001 · Tamamlandı 2020-07-15 – 2024-02-23
  3. 2017 Metanol Dehidrasyon Katalizörünün Sentezi, Karakterizasyonu ve Doğrudan Dimetil Eter Üretiminde Kullanılması :Sistem Basıncının Etkisi Yükseköğretim Kurumları tarafından destekli bilimsel araştırma projesi · Tamamlandı 2017-04-12 – 2018-02-19
  4. 2018 Yüksek Teknoloji Mikro-dalga Reaktör ve Membran Reaktör Sistemleri Kullanılarak Etandan Hidrojen Üretimi Yükseköğretim Kurumları tarafından destekli bilimsel araştırma projesi · Tamamlandı 2018-06-11 – 2020-12-31
  5. 2017 Nikel yüklü silika mikro küre katalizörler varlığında hidrojen üretimi Yükseköğretim Kurumları tarafından destekli bilimsel araştırma projesi · Tamamlandı 2017-03-15 – 2018-03-15

Proceedings 43 See all (43) →

  1. 2015 From Glycerol to Fuel Oxygenates through Etherification with tert Butyl Alcohol iso Butene and iso Amylene 10th European Congress of chemical Engineering & 3rd European Congress of Applied Biotechnology & 5th European Process Intensification Conference
  2. 2016 Ni ve Cu Bazlı Katalizörlerle Asetik Asitten Hidrojen Üretimi UKMK-12
  3. 2017 Effect of Pressure on Direct Dimethyl Ether (DME) Synthesis from Syngas over Tungstophosphoric Acid (TPA) Impregnated Mesoporous Alumina Catalyst The Porous and Powder Materials Symposium and Exhibitions (PPM 2017)
  4. 2018 Adsorption of NOx on Barium-based MCM-41 sorbents International Eurasian Conference on Biological and Chemical Sciences (EurasianBioChem 2018)
  5. 2017 Activity Tests of Alumina Supported Ni and Co Catalysts in Acetic Acid Steam Reforming Reaction The Porous and Powder Materials Symposium and Exhibitions (PPM 2017)

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Collaboration network

From the author lists of YÖKSİS publication records. Duplicate records of a work count once; institutions are co-authors’ current YÖKSİS affiliations.

Co-authors
63
With an akaturk profile
24
Turkish institutions
13
Co-authored works
%100

Academic co-authors 24

  1. BİRCE PEKMEZCİ KARAMAN Doçent · Gazi Üniversitesi same university 9
  2. EMİNE EKİNCİ Doçent · Gazi Üniversitesi same university 7
  3. HÜSEYİN ARBAĞ Profesör · Gazi Üniversitesi same university 6
  4. LEVENT DEĞİRMENCİ Profesör · Bilecik Şeyh Edebali Üniversitesi 6
  5. GAMZE GÜNDÜZ MERİÇ Doçent · Bilecik Şeyh Edebali Üniversitesi 3
  6. MERVE ÇELİK ÖZCAN Araştırma Görevlisi · Gazi Üniversitesi same university 3
  7. DORUK DOĞU Doktor Öğretim Üyesi · Atılım Üniversitesi 2
  8. DİLŞAD DOLUNAY ESLEK KOYUNCU Doçent · Gazi Üniversitesi same university 2
  9. NİYAZİ ALPER TAPAN Profesör · Gazi Üniversitesi same university 2
  10. PINAR DEĞİRMENCİOĞLU Araştırma Görevlisi · Gazi Üniversitesi same university 2
Show all (24)
  1. BUĞRAHAN EMSEN Doçent · Karamanoğlu Mehmetbey Üniversitesi 1
  2. DENİZ SEVMEN Doktor Öğretim Üyesi · Selçuk Üniversitesi 1
  3. EMEL ECE Doktor Öğretim Üyesi · Karamanoğlu Mehmetbey Üniversitesi 1
  4. GAYE KAYA Profesör · Kahramanmaraş Sütçü İmam Üniversitesi 1
  5. GÜLCAN BAHÇECİOĞLU TURAN Doçent · Fırat Üniversitesi 1
  6. GÜRKAN KARAKAŞ Profesör · Orta Doğu Teknik Üniversitesi 1
  7. HATİCE TUĞBA DOĞMUŞ LEHTİJARVİ Profesör · Isparta Uygulamalı Bilimler Üniversitesi 1
  8. KADİR PEKTAŞ Profesör · İstanbul Medeniyet Üniversitesi 1
  9. MAZLUM BAKİ DEMİRTAŞ Öğretim Görevlisi (ders Vermekle Görevli) · Trakya Üniversitesi 1
  10. MUSTAFA ADAK Profesör · Akdeniz Üniversitesi 1
  11. MÜSLİM ALANOĞLU Doçent · Fırat Üniversitesi 1
  12. NECİP GÖKHAN TAŞ Doktor Öğretim Üyesi · Erzincan Binali Yıldırım Üniversitesi 1
  13. PINAR ÇALIK Profesör · Orta Doğu Teknik Üniversitesi 1
  14. YASEMİN ERDEN Doçent · Erzurum Teknik Üniversitesi 1

National collaboration 13 institutions

Within own university22 joint works · Gazi Üniversitesi

  1. Bilecik Şeyh Edebali Üniversitesi 8 works · 2 academics
  2. Atılım Üniversitesi 2 works · 1 academics
  3. Orta Doğu Teknik Üniversitesi 2 works · 2 academics
  4. Akdeniz Üniversitesi 1 works · 1 academics
  5. Erzincan Binali Yıldırım Üniversitesi 1 works · 1 academics
  6. Erzurum Teknik Üniversitesi 1 works · 1 academics
  7. Fırat Üniversitesi 1 works · 2 academics
  8. Isparta Uygulamalı Bilimler Üniversitesi 1 works · 1 academics
  9. Kahramanmaraş Sütçü İmam Üniversitesi 1 works · 1 academics
  10. Karamanoğlu Mehmetbey Üniversitesi 1 works · 2 academics
Show all (13)
  1. Selçuk Üniversitesi 1 works · 1 academics
  2. Trakya Üniversitesi 1 works · 1 academics
  3. İstanbul Medeniyet Üniversitesi 1 works · 1 academics

Other co-authors (incl. international) 39

GÜLŞEN DOĞU 16TİMUR DOĞU 15KIRALİ MÜRTEZAOĞLU 9NALAN OZBAY 7Nurbanu Çakıryılmaz 4BÜŞRA ERYILDIRIM 3Carles Fite 2ERIK HOLMGREEN 2Eliana Ramirez 2Javier Tejero 2Rodrigo Soto 2Roger Bringue 2SALEH AHMAT İBRAHİM 2UMIT OZKAN 2BURÇİN İKİZERBurhan KüçükkılıçCAN GÜVENÇEBRU AYDINEDA ÇELİK AKDURENEZ ALANFERDİ AYDINFEYDULLAH AKGÜLILKNUR GONDERTENJUNKO MİTOMEJohanna WitzellKAYA EMİNEKerem TaluMerve OruçNEZAHAT BOZNINA VLASENKONİSA ÖZBENOSMAN AKTAŞPETER STRIZHAKRALUCA MUNTEANUSahin Sahika OzelYU KOCHKINİbrahim Pamukİlkin TuğŞahika Özel

Authors without an akaturk profile (international researchers, retired or former academics, students, clinicians) are grouped by name spelling; short forms such as “Gulluce M.” join the single full name they match.