Geri Dön

Synthesis gas production using non-thermal plasma reactors

Başlık çevirisi mevcut değil.

PDF İndir

  1. Tez No: 401537
  2. Yazar: ONUR TAYLAN
  3. Danışmanlar: DR. HALİL BERBEROĞLU
  4. Tez Türü: Doktora
  5. Konular: Makine Mühendisliği, Mechanical Engineering
  6. Anahtar Kelimeler: Belirtilmemiş.
  7. Yıl: 2014
  8. Dil: İngilizce
  9. Üniversite: The Unıversıty Of Texas At Austın
  10. Enstitü: Yurtdışı Enstitü
  11. Ana Bilim Dalı: Belirtilmemiş.
  12. Bilim Dalı: Belirtilmemiş.
  13. Sayfa Sayısı: Belirtilmemiş.

Özet

Özet yok.

Özet (Çeviri)

Today we face the formidable challenge of meeting the fuel needs of a growing population while minimizing the adverse impacts on our environment. Thus, we search for technologies that can provide us with renewable fuels while mitigating the emission of global pollutants. To this end, use of non-thermal plasma processes can offer novel methods for efficiently and effectively converting carbon dioxide and water vapor into synthesis gas for the production of renewable fuels. Particularly, non-thermal plasma technologies offer distinct advantages over conventional methods including lower operating temperatures, reduced need for catalysts and potentially lower manufacturing and operation costs. The non-thermal plasma reactors have been studied for ozone generation, material synthesis, decontamination, thruster for microsatellites, and biomedical applications. This dissertation focuses on producing synthesis gas using a non-thermal, microhollow cathode discharge (MHCD) plasma reactor. The prototype MHCD reactor consisted of a mica plate as a dielectric layer that was in between two aluminum electrodes with a through hole. First, electrical characterization of the reactor was performed in the self-pulsing regime, and the reactor was modeled with an equivalent circuit which consisted of a constant capacitance and a variable, negative differential resistance. The values of the resistor and capacitors were recovered from experimental data, and the introduced circuit model was validated with independent experiments. Experimental data showed that increasing the applied voltage increased the current, self-pulsing frequency and average power consumption of the reactor, while it decreased the peak voltage. Subsequently, carbon dioxide and water vapor balanced with argon as the carrier gas were fed through the hole, and parametric experiments were conducted to investigate the effects of applied voltage (from 2.5 to 4.5 kV), flow rate (from 10 to 800 mL/min), CO2 mole fraction in influent (from 9.95% to 99.5%), dielectric thickness (from 150 to 450 m) and discharge hole diameter (from 200 to 515 m) on the composition of the products, electrical-to-chemical energy conversion efficiency, and CO2-to-CO conversion yield. Within the investigated parameter ranges, the maximum H2/CO ratio was about 0.14 when H2O and CO2 were dissociated in different reactors. Additionally, at an applied voltage of 4.5 kV, the maximum yields were about 28.4% for H2 at a residence time of 128 s and 17.3% for CO at a residence time of 354 s. Increasing residence time increased the conversion yield, but decreased the energy conversion efficiency. The maximum energy conversion efficiency of about 18.5% was achieved for 99.5% pure CO2 at a residence time of 6 s and an applied voltage of 4.5 kV. At the same applied voltage, the maximum efficiency was about 14.8% for saturated CO2 at a residence time of 12.8 s. The future work should focus on optimizing the conversion yield and efficiency as well as analyzing the temporal and spatial changes in the gas composition in the plasma reactor.

Benzer Tezler

  1. Tez No

    625775

    Design and modeling of a non-thermal plasma reactor for co2 dissociation

    Co2 ayrışması için termal olmayan plazma reaktörünün modellemesi ve tasarımı

    HUMAYUN AHMED

    Yüksek Lisans

    İngilizce

    İngilizce

    2017

    EnerjiOrta Doğu Teknik Üniversitesi

    Sürdürülebilir Çevre ve Enerji Sistemleri Ana Bilim Dalı

    DR. ÖĞR. ÜYESİ ONUR TAYLAN

  2. Tez No

    613304

    Sprey atomizasyon destekli indüktif plazma yöntemiyle oksit ve oksit-dışı nanopartikül üretimi

    Production of oxide and non-oxide nanoparticles via the method of spray atomization assisted inductive plasma

    ABDULLAH SELİM PARLAKYİĞİT

    Doktora

    Türkçe

    Türkçe

    2019

    Makine Mühendisliğiİstanbul Teknik Üniversitesi

    Makine Mühendisliği Ana Bilim Dalı

    PROF. DR. CELALETDİN ERGUN

  3. Tez No

    741349

    Production and characterization of W-Ni matrix composites reinforced with CeB6, NdB6, ErB4 particulates by powder metallurgy methods

    CeB6, NdB6, ErB4 partikülleri ile takviye edilmiş W-Ni matris kompozitlerin toz metalurjisi yöntemleri ile üretimi ve karakterizasyon çalışmaları

    BURÇAK BOZTEMUR

    Yüksek Lisans

    İngilizce

    İngilizce

    2022

    Metalurji Mühendisliğiİstanbul Teknik Üniversitesi

    Metalurji ve Malzeme Mühendisliği Ana Bilim Dalı

    DOÇ. DR. DUYGU AĞAOĞULLARI

  4. Tez No

    997836

    Yapısal seramikler için Si3N4/SiC kompozit tozlarının üretilmesi ve optimize edilmesi

    Productin and optimization of Si3N4/SiC composite powders for structural ceramics

    BETÜL ARSLAN

    Doktora

    Türkçe

    Türkçe

    2026

    Metalurji MühendisliğiSakarya Üniversitesi

    Metalurji ve Malzeme Mühendisliği Ana Bilim Dalı

    DOÇ. DR. NURAY CANİKOĞLU

  5. Tez No

    976548

    Recycling and reuse of metals with deep eutectic solvents: A green and circular approach for the resynthesis of NMC cathodes from li-ion battery nmc cathode materials

    Derin ötektik çözücüler ile metallerin geri dönüşümü ve yeniden kullanımı: li-iyon pil NMC katotlarından yeşil ve döngüsel bir yaklaşımla yeniden NMC katot sentezi

    GİZEM BURCU BİLGİN

    Yüksek Lisans

    İngilizce

    İngilizce

    2025

    Metalurji Mühendisliğiİstanbul Teknik Üniversitesi

    Metalurji ve Malzeme Mühendisliği Ana Bilim Dalı

    DOÇ. DR. BİLLUR DENİZ KARAHAN

Geri Dön