Abstract The high demand for hydrogen has led to the development of various production methods. This study examines use synthetic and natural catalysts in generation biohydrogen. A bibliographic analysis was conducted using VOSviewer ScientoPy tools. research focuses on synthesis, purification, separation, storage, based findings. Hydrogen biohydrogen can be produced through processes such as r...

The effect of chemical pretreatments using NaOH, H2O2, and Ca(OH)2 on Empty Palm Fruit Bunches (EPFB) to degrade EPFB lignin before pyrolyis was investigated. Spectrophotometer analysis proved consecutive addition of NaOH and H2O2 decomposed almost 100% of EPFB lignin compared to 44% for the Ca(OH)2, H2O2 system while NaOH and Ca(OH)2 used exclusively could not alter lignin much. Next, the pret...

On the basis of granular synthetic zeolites NaY, HY, and ZSM-5, adsorbents containing nanoparticles silver, cobalt, molybdenum, tungsten were obtained. The samples have a lower surface polarity in comparison with initial zeolites, which is reflected selectivity number respect to argon. This due fact that argon molecule interacts only through nonspecific forces. Modification was performed by int...

Thermochemical processing of lignin ends up with a major problem which is the high yield char remained from conversion, causing low yields desired products. The ReS2/Al2O3 catalyst, used in this work, exhibited char-suppressing potential and hydrodeoxygenation efficiency reductive liquefaction kraft lignin. Compared to NiMo/Al2O3, as conventional sulfide showed significantly better catalytic pe...

The activation of soil-fixed phosphorus is a long-term concern in soil science. In order to enhance the activation effect to soil-fixed phosphorus in red soil, different modified zeolite, through physical, chemical method and the associated both physics and chemistry, was used in this paper. The results showed as following: 1) the activated ability to soil-fixed phosphorus in red soil for modif...