One of the main causes of climate change is the increased concentration of greenhouse gases from anthropogenic sources. Therefore, the search for processes that provide mitigation of these gases is imperative and very important. Dry reforming of methane (DRM) is a process that converts CO2 and CH4 in pure syngas. Thus, this study aims to evaluate the influence of the calcination temperature (500 and 700 °C) in the titanate nanotubes (TNT) structure. The calcination at 700 °C led to a new morphology in the form of titanate nanorods (TNR). TNT and TNR nanostructures were modified with Ni and used as catalysts in the DRM reaction. The CO2 and CH4 conversions were around 60 and 48%, respectively, when using Ni-TNT500 at 700 °C, while values around 85 and 70%, respectively, were obtained using TNR in the same reactional condition. Both catalysts presented values of H2/CO ratio near 1. sources Therefore important (DRM CO CH syngas Thus 500 (50 70 C (TNT structure TNR. . (TNR) reaction 6 48 48% respectively NiTNT500 NiTNT TNT500 Ni-TNT50 8 70% condition H2CO HCO H2 H 1 50 (5 7 (TNR 4 NiTNT50 TNT50 Ni-TNT5 5 ( NiTNT5 TNT5 Ni-TNT

This note has as objective to present the advantages of the use of syringe-type pumps for the feeding of liquid reactants, together with mass flow controllers for gases, instead of the saturators, as it is generally accomplished. Among the advantages, the system with syringe pumps presents a greater flexibility in flow control as well as in composition compared with the system that uses saturator. In addition, the flow of the liquid reactants is known with precision in the syringe pump system.