Characterization of the molar mass distribution (MMD) poly (ether ether ketone) (PEEK) is very troublesome due to insolubility PEEK in common solvents. The solubility may be substantially improved after its sulfonation. Sulfonated (SPEEK) was prepared by sulfonation with 98% concentrated H2SO4 at room temperature. presence sulfonic acid group (-SO3H) matrix confirmed nuclear magnetic resonance ...

Abstract Water pollution and the unsustainable use of fossil fuel derivatives require advanced catalytic methods to clean waters produce fine chemicals from modern biomass. Classical homogeneous catalysts such as sulfuric, phosphoric, hydrochloric acid are highly corrosive non-recyclable, whereas heterogeneous appear promising for lignocellulosic waste depolymerization, pollutant degradation, m...

Abstract Proton exchange membrane (PEM) is the core component of proton fuel cell. Generally speaking, ordinary PEM has poor barrier to (especially liquid fuel) and conduction a strong dependence on water molecules. Compared with PEM, high temperature cell works in non-water environment, which overcomes above problems. Besides, system complex low impurity much simpler flow field design. Polyben...

Effective solid acid catalysts play a key role to produce high-quality biodiesel through triglyceride transesterification. The present work describes a facile technique for the synthesis of a high-performing sulfonated multi-walled carbon nanotube (S-MWCNTs) solid acid catalyst for fatty acid ethyl ester (biodiesel) production. The results indicated that S-MWCNTs possessed high acidity due to t...

Nonfluorinated sulfonic acid membranes are a group of promising candidate materials for the commercialization of proton exchange membrane fuel cell PEMFC technology. However, one of the main obstacles is that the harsh fuel cell environment may originate different modes of degradation and aging processes that result in either chemical or morphological alteration in these membranes. The effect o...