Amorphous (Ni_0.6Nb_0.4)_1−xZr_x membranes were investigated by means of X-ray diffraction, thermogravimetry, differential thermal analysis and tensile modulus measurements. Crystallization occurs only above 673 K, and even after hydrogenation the membranes retain their mainly amorphous nature....

A new mathematical model is proposed for the estimation of CO2 gasification kinetics of different rank coals and ash contents. There are no previous reports on the determination of the conversion rate or even residence time of CO2 or steam gasification based on coal characterization and for a...

Electrogenesis in microbial fuel cells (MFCs) is a promising approach to extract useful energy from sewage sludge. However, its impact on ultimate sludge disposal (e.g., incineration) has not been well evaluated. In the present work, thermogravimetry and differential scanning calorimetry were...

This work describes the production of biodiesel from Jatropha curcas oil. The kernel samples provided by Embrapa-PI, were first crushed in a blender and then subjected to extraction with hexane. The oil yield was between 54.71 ± 0.47 and 64.16 ± 2.88%. The J. curcas oil was then submitted...