Energy and Exergy Analysis of Green Hydrogen Production

Pinar Büyük; Ahmet Eryaşar

Article Details

Energy and Exergy Analysis of Green Hydrogen Production

Authors:

Pinar Büyük | Ahmet Eryaşar

Publisher:

Gazi University

Main Topics:

Mühendislik

Journal:

Politeknik Dergisi Vol.28 Issue 2, pp.461-468

Document Type:

Article

Publication Date:

3/2025

Document Language:

English

Document ID (Org No.):

2001344326

pISSN:

2147-9429

Keywords:

Abstract:

 Biomass pyrolysis and gasification are recognized as effective thermal technologies for producing green hydrogen obtained through thermal conversion from biomass. This research paper presents a comparatmive analysis of the energy and exergy performance of pyrolysis and gasification systems. The study investigates two critical process conditions: low-temperature pyrolysis at 500C and high-temperature gasification at 900C. The analysis integrates thermodynamic equilibrium calculations and modeling to produce hydrogen and offers a comprehensive evaluation of energy and exergy efficiencies. The comparison is carried out between a downdraft gasifier and a pyrolysis process, both employing wood chips as the biomass feedstock. This paper delves into the energy and exergy yields of these distinct thermal conversion methods for energy production. The research identifies pyrolysis at 900C as the optimal model condition due to its lower energy consumption and the absence of agent materials. Energy and exergy analyses are conducted at both 500C and 900C for all processes. The model results demonstrate that pyrolysis yields 60 energy at 500C and 94 at 900C. Furthermore, the study reports on the effects of temperature variations on energy and exergy yields. This study contributes to the examination of the performance of thermal conversion methods from biomass for green hydrogen production.

 Biomass pyrolysis and gasification are recognized as effective thermal technologies for producing green hydrogen obtained through thermal conversion from biomass. This research paper presents a comparatmive analysis of the energy and exergy performance of pyrolysis and gasification systems. The study investigates two critical process conditions: low-temperature pyrolysis at 500C and high-temperature gasification at 900C. The analysis integrates thermodynamic equilibrium calculations and modeling to produce hydrogen and offers a comprehensive evaluation of energy and exergy efficiencies. The comparison is carried out between a downdraft gasifier and a pyrolysis process, both employing wood chips as the biomass feedstock. This paper delves into the energy and exergy yields of these distinct thermal conversion methods for energy production. The research identifies pyrolysis at 900C as the optimal model condition due to its lower energy consumption and the absence of agent materials. Energy and exergy analyses are conducted at both 500C and 900C for all processes. The model results demonstrate that pyrolysis yields 60 energy at 500C and 94 at 900C. Furthermore, the study reports on the effects of temperature variations on energy and exergy yields. This study contributes to the examination of the performance of thermal conversion methods from biomass for green hydrogen production.

 Biomass pyrolysis and gasification are recognized as effective thermal technologies for producing green hydrogen obtained through thermal conversion from biomass. This research paper presents a comparatmive analysis of the energy and exergy performance of pyrolysis and gasification systems. The study investigates two critical process conditions: low-temperature pyrolysis at 500C and high-temperature gasification at 900C. The analysis integrates thermodynamic equilibrium calculations and modeling to produce hydrogen and offers a comprehensive evaluation of energy and exergy efficiencies. The comparison is carried out between a downdraft gasifier and a pyrolysis process, both employing wood chips as the biomass feedstock. This paper delves into the energy and exergy yields of these distinct thermal conversion methods for energy production. The research identifies pyrolysis at 900C as the optimal model condition due to its lower energy consumption and the absence of agent materials. Energy and exergy analyses are conducted at both 500C and 900C for all processes. The model results demonstrate that pyrolysis yields 60 energy at 500C and 94 at 900C. Furthermore, the study reports on the effects of temperature variations on energy and exergy yields. This study contributes to the examination of the performance of thermal conversion methods from biomass for green hydrogen production.

 Biyokütleden termal dönüşüm yöntemi ile elde edilen yeşil hidrojen üretimi için biomass piroliz ve gazifikasyon, sürdürülebilir hidrojen üretimi için etkili termal teknolojiler olarak kabul edilmektedir. Bu araştırma makalesi, piroliz ve gazifikasyon sistemlerinin enerji ve ekserji performansını karşılaştırmalı bir analizini sunmaktadır. Çalışma, düşük sıcaklıkta 500Cde piroliz ve yüksek sıcaklıkta 900Cde gazifikasyon olmak üzere iki kritik işlem koşulunu incelemektedir. Analiz, termal denge hesaplamaları ve modellemelerini içeren bir yöntem kullanarak hidrojen üretimini gerçekleştirir ve enerji ve ekserji verimliliğini kapsamlı bir şekilde değerlendirir. Karşılaştırma, biyokütle malzemesi olarak odun yongalarını kullanan bir downdraft gazifikasyon ünitesi ile piroliz işlemi arasında gerçekleştirilir. Bu makale, enerji üretimi için bu farklı termal dönüşüm yöntemlerinin enerji ve ekserji verimini detaylı olarak incelemektedir. Araştırma, düşük enerji tüketimi ve ajan malzeme kullanımının olmaması nedeniyle 900Cde pirolizin en iyi model koşul olduğunu belirler. Tüm işlemler için hem 500C hem de 900Cde enerji ve ekserji analizleri gerçekleştirilir. Model sonuçları, piroliz işleminin 500C 60 enerji verimi sağladığını ve 900Cde 94 enerji verimi sağladığını göstermektedir. Ayrıca, çalışma sıcaklığındaki değişikliklerin enerji ve ekserji verimine etkileri de raporlanmıştır. Bu çalışma, yeşil hidrojen üretimi için biyokütleden termal dönüşüm yöntemlerinin performansını inceleyen bir katkı sunmaktadır.

Article Details

Energy and Exergy Analysis of Green Hydrogen Production

Authors:

Pinar Büyük | Ahmet Eryaşar

Publisher:

Gazi University

Main Topics:

Mühendislik

Journal:

Politeknik Dergisi Vol.28 Issue 2, pp.461-468

Document Type:

Article

Publication Date:

3/2025

Document Language:

English

Document ID (Org No.):

2001344326

pISSN:

2147-9429

: Biomass Gasification

Equilibrium model

Pyrolysis

Energy and exergy analysis

Hydrogen ProductionBiyokütle Gazlaştırma

Denge Modeli

Piroliz

Enerji ve Ekserji Analizi

Hidrojen Üretimi

Issues

Article Details

Authors: Pinar Büyük | Ahmet Eryaşar

Publisher: Gazi University

Main Topics: Mühendislik

Journal: Politeknik Dergisi Vol.28 Issue 2, pp.461-468

Document Type: Article

Publication Date: 3/2025

Document Language: English

Document ID (Org No.): 2001344326

pISSN: 2147-9429

Issues

Authors:

Pinar Büyük | Ahmet Eryaşar

Publisher:

Gazi University

Main Topics:

Mühendislik

Journal:

Politeknik Dergisi Vol.28 Issue 2, pp.461-468

Document Type:

Article

Publication Date:

3/2025

Document Language:

English

Document ID (Org No.):

2001344326

pISSN:

2147-9429