Role of Preparation Method in Tailoring Ni/Al2O3 Catalysts for Low-Pressure Methanation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F25%3A43932429" target="_blank" >RIV/60461373:22320/25:43932429 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s10562-025-05211-5" target="_blank" >https://link.springer.com/article/10.1007/s10562-025-05211-5</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10562-025-05211-5" target="_blank" >10.1007/s10562-025-05211-5</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Role of Preparation Method in Tailoring Ni/Al2O3 Catalysts for Low-Pressure Methanation

Popis výsledku v původním jazyce

Methanation is an important technological process producing synthetic natural gas. This study compares five preparation methods for Ni/Al2O3 catalysts and discusses their impact on the formation of Ni active sites and their methanation activity. Conventional wet impregnation was evaluated alongside methods involving microwave-assisted deposition (MC), ultrasonic waves (UT), and pH-adjusted methods such as ammonia evaporation (AE) and deposition precipitation (DP). These techniques primarily influenced the size of Ni active sites as well as their reducibility and stability. The stability of NiO/Ni species after reduction and methanation was described. Their performance of prepared Ni/Al2O3 was assessed in CO2 methanation within a temperature range of 250 – 490 °C under a low gauge pressure of 0.2 MPa. The highest methane yield of 42% was obtained with the MC catalyst; however, a high reaction temperature of 449 °C was needed. On the other hand, both DP and AE catalysts outperformed all tested catalysts in the catalyst productivity. This was due to the smaller Ni/NiO particles and their higher thermal stability.

Název v anglickém jazyce

Role of Preparation Method in Tailoring Ni/Al2O3 Catalysts for Low-Pressure Methanation

Popis výsledku anglicky

Methanation is an important technological process producing synthetic natural gas. This study compares five preparation methods for Ni/Al2O3 catalysts and discusses their impact on the formation of Ni active sites and their methanation activity. Conventional wet impregnation was evaluated alongside methods involving microwave-assisted deposition (MC), ultrasonic waves (UT), and pH-adjusted methods such as ammonia evaporation (AE) and deposition precipitation (DP). These techniques primarily influenced the size of Ni active sites as well as their reducibility and stability. The stability of NiO/Ni species after reduction and methanation was described. Their performance of prepared Ni/Al2O3 was assessed in CO2 methanation within a temperature range of 250 – 490 °C under a low gauge pressure of 0.2 MPa. The highest methane yield of 42% was obtained with the MC catalyst; however, a high reaction temperature of 449 °C was needed. On the other hand, both DP and AE catalysts outperformed all tested catalysts in the catalyst productivity. This was due to the smaller Ni/NiO particles and their higher thermal stability.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/TS01020038" target="_blank" >TS01020038: Ověření technologie Power-to-X v reálných podmínkách ČOV</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

CATALYSIS LETTERS

ISSN

1011-372X

e-ISSN

1572-879X

Svazek periodika

155

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

367

Kód UT WoS článku

001597165200002

EID výsledku v databázi Scopus

2-s2.0-105019203733