Search for: All records

This work presents an integrated approach to industrial decarbonization by converting mixed polyolefin waste into structured carbon with exceptional Joule heating properties, enabling efficient electrified hydrogen productionviaNH₃decomposition. 

The heat effect of nonthermal plasma significantly enhanced the synergy between the plasma and the catalytically active sites. Consequently, nearly 100% NH₃decomposition was achieved over the low-loading Ru/Al₂O₃catalyst under adiabatic conditions. 

This work demonstrates a series of functionalization methods to enhance the utility of thermoplastic-elastomer derived ordered mesoporous carbons, including chemical activation, heteroatom doping, and the introduction of nanoparticles. 

Ammonia can be employed as an important co-reactant for efficient light alkane conversion. The reaction is achieved through either ammonia reforming (for CO_x-free H₂and HCN) or ammonia dehydrogenation (for acetonitrile and H₂). 

Abstract While cobalt-based catalysts have been used in industrial Fischer-Tropsch synthesis for decades, little is known about how the dynamics of the Co-Co₂C phase transformation drive their performance. Here we report on the occurrence of hysteresis effects in the Fischer-Tropsch reaction over potassium promoted Co/MnO_xcatalyst. Both the reaction rate and the selectivity to chain-lengthened paraffins and terminally functionalized products (aldehydes, alcohols, olefins) show bistability when varying the hydrogen/carbon monoxide partial pressures back and forth from overall reducing to carbidizing conditions. While the carbon monoxide conversion and the selectivity to functionalized products follow clockwise hysteresis, the selectivity to paraffins shows counter-clockwise behavior. In situ X-ray diffraction demonstrates the activity/selectivity bistability to be driven by a Co-Co₂C phase transformation. The conclusions are supported by High Resolution Transmission Electron Microscopy which identifies the Co-Co₂C transformation, Mn₅O₈layered topologies at low H₂/CO partial pressure ratios, and MnO at high such ratios.