Dry Reforming of Methane over CNT-Supported CeZrO2, Ni and Ni-CeZrO2 Catalysts

Agata Łamacz,Michalina Stawowy,Paulina Jagódka,Krzysztof Matus

doi:10.3390/catal10070741

Abstract

In this work, the carbon nanotubes (CNT)-supported nanosized, well-dispersed, CeZrO2 and Ni-CeZrO2 catalysts were obtained and tested for the first time in the reaction of methane dry reforming (DRM). The performance of the hybrid materials was compared with the performance of Ni/CNT catalyst. The mechanism of the DRM reaction and the occurrence of reverse water gas shift reaction (RWGS) and CO2 deoxidation were discussed in terms of catalysts composition. The contribution of RWGS and CO2 deoxidation in the DRM process, demonstrating an increased CO2 consumption when compared to CH4, and H2/CO < 1, varied depending on the catalyst composition, was also studied.

Highlights

The climate change is one of the most important issues the modern society struggles with
The main foundation of this transformation is the growing atmospheric pollution caused by the greenhouse gases (GHGs), i.e., water vapor (H2 O), methane (CH4 ), carbon dioxide (CO2 ), fluorochlorocarbons and nitrous oxides (NOx)
For the Ni/carbon nanotubes (CNT) and NiCZ/CNT samples, the diffraction peaks located at ca. 44.6 and 51.9◦ are assigned to (111) and (200) planes of Ni, respectively

Summary

Introduction

The climate change is one of the most important issues the modern society struggles with. The main foundation of this transformation is the growing atmospheric pollution caused by the greenhouse gases (GHGs), i.e., water vapor (H2 O), methane (CH4 ), carbon dioxide (CO2 ), fluorochlorocarbons and nitrous oxides (NOx). The highest contribution to the increasing CO2 and CH4 emissions has the agricultural industry, coal- and natural gas-based industry, and transportation. It is estimated, that increasing demand for energy (still mainly produced from fossil fuels) has 80–85% contribution to global warming [1]. Several methods for GHGs conversion have been developed in order to reduce their negative impact on the environment. One of them is the dry reforming of methane (DRM)

Methods

Results

Conclusion