Work

Local Thermochemical Mechanisms in Direct Solar Graphite Synthesis from Methane

Year: 2024

Type: article

Abstract: Methane pyrolysis is known to produce hydrogen and solid carbon in a variety of thermal processes. However, the generated carbon product typically belongs to a low-value amorphous type. Here, we elucidate the thermochemical mechanisms of a reaction that produces high-quality graphite via direct solar methane pyrolysis on a porous substrate. By comparing graphite deposition rates and local reaction zone temperatures of exposed and shadowed regions from the same experiment, we clarify the effects of thermolysis and photolysis in this emission-free process that both decarbonizes a fuel and produces a critical material for the sustainable energy transition.

Source: Energy & Fuels

DOI: 10.1021/acs.energyfuels.4c03327

Authors: Hengrui Xu, Mostafa Abuseada, Y. Sungtaek Ju, R. Mitchell Spearrin, Timothy S. Fisher

Institution: University of California, Los Angeles

Language: English

Topic: Catalysts for Methane Reforming

Subfield: Catalysis

Field: Chemical Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Climate action

Open Access status: hybrid

Estimated APC paid: $4,500