Impact of natural gas composition on steam thermal plasma assisted pyrolysis for hydrogen and solid carbon production

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F23%3A00579196" target="_blank" >RIV/61389021:_____/23:00579196 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/23:00579196 RIV/60461373:22310/23:43927667 RIV/60461373:22320/23:43927667

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0196890423010944?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0196890423010944?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.enconman.2023.117748" target="_blank" >10.1016/j.enconman.2023.117748</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Impact of natural gas composition on steam thermal plasma assisted pyrolysis for hydrogen and solid carbon production

Popis výsledku v původním jazyce

Pyrolysis of simulated natural gas (NG) was studied experimentally in the reactor equipped with a steam thermal plasma torch. Simulated NG consisted of 75 % of methane, 15 % of ethane, 5 % of propane and 5 % of butane. Experimental composition of the output gas was compared with the equilibrium calculations corresponding to the gaseous mixture entering the reactor. NG input flow rate 100 slm was considered the best in terms of agreement between the experimental and calculated compositions. Consequently, for this flow rate, the majority of natural gas was reformed into the mixture of hydrogen and solid carbon. For the NG input flow rates of respectively, 200 slm and 500 slm, a non-negligible amount of unconverted methane (from 37 slm to 155 slm) was found to remain in the output gas. On the other hand, the specific energy requirement with respect to the produced hydrogen was better for 500 slm of NG (1.1–1.6 kWh/m3.H2) than for 200 slm (1.8–2.7 kWh/m3.H2) or 100 slm (3.2–3.6 kWh/m3.H2). In all the studied experimental conditions, practically no CO2 was formed, only a small amount of CO corresponding to oxygen from the steam plasma was detected. A comparison with the previously published works, where methane and natural gas were not distinguished, showed that NG composition can play an important role in the pyrolysis process. In particular, the presence of higher hydrocarbons decreased the effectivity of methane conversion and also reduced the specific energy requirement, with respect to the pure methane pyrolysis.

Název v anglickém jazyce

Impact of natural gas composition on steam thermal plasma assisted pyrolysis for hydrogen and solid carbon production

Popis výsledku anglicky

Pyrolysis of simulated natural gas (NG) was studied experimentally in the reactor equipped with a steam thermal plasma torch. Simulated NG consisted of 75 % of methane, 15 % of ethane, 5 % of propane and 5 % of butane. Experimental composition of the output gas was compared with the equilibrium calculations corresponding to the gaseous mixture entering the reactor. NG input flow rate 100 slm was considered the best in terms of agreement between the experimental and calculated compositions. Consequently, for this flow rate, the majority of natural gas was reformed into the mixture of hydrogen and solid carbon. For the NG input flow rates of respectively, 200 slm and 500 slm, a non-negligible amount of unconverted methane (from 37 slm to 155 slm) was found to remain in the output gas. On the other hand, the specific energy requirement with respect to the produced hydrogen was better for 500 slm of NG (1.1–1.6 kWh/m3.H2) than for 200 slm (1.8–2.7 kWh/m3.H2) or 100 slm (3.2–3.6 kWh/m3.H2). In all the studied experimental conditions, practically no CO2 was formed, only a small amount of CO corresponding to oxygen from the steam plasma was detected. A comparison with the previously published works, where methane and natural gas were not distinguished, showed that NG composition can play an important role in the pyrolysis process. In particular, the presence of higher hydrocarbons decreased the effectivity of methane conversion and also reduced the specific energy requirement, with respect to the pure methane pyrolysis.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Energy Conversion and Management

ISSN

0196-8904

e-ISSN

1879-2227

Svazek periodika

297

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

117748

Kód UT WoS článku

001096486800001

EID výsledku v databázi Scopus

2-s2.0-85173606251