We evaluate how the heterogeneity of precursor may affect pyrolysis and CO2 gasification behavior aimed at activated carbon applications. Barley straw, ground classified into five size ranges, is characterized by non-isothermal thermogravimetry tests various heating rates. Fixed volatile matter contents decrease with particle size. Also, finest fraction enriched in minerals exogenous contaminat...

Alkali pretreatment is one of the chemical technologies that has been examined on various types lignocellulosic biomass. To gain a better insight into effects potassium-based catalyst pyrolysis behavior with different materials, potassium bicarbonate (KHCO3) and nitrate (KNO3) were used as additives in this study. The experimental parameters which included particle size, heating rate, additive ...

Petrography and physicomechanical properties of alkali granites, alkali quartz syenite, and nepheline syenite from Ambela, NW Pakistan, have been investigated. Whereas the alkali quartz syenite and most of the alkali granites are megaporphyritic, the nepheline syenite and some of the alkali granites are microporphyritic. Their phenocryst shape and size and abundance of groundmass are also diffe...

The results of our infrared reflectance studies of single and mixed alkali borate glasses are reviewed and discussed in the context of the network structure and the interactions between alkali cations and their sites in the glass. In particular, we focus on the strong influence of the alkali cation type, content, and alkali subsitution on the structure of the network building units. The dominan...

BACKGROUND Pretreatment is a crucial step for valorization of lignocellulosic biomass into valuable products such as H2, ethanol, acids, and methane. As pretreatment can change several decisive factors concurrently, it is difficult to predict its effectiveness. Furthermore, the effectiveness of pretreatments is usually assessed by enzymatic digestibility or merely according to the yield of the ...

sugarcane bagasse contains cellulose, lignin and hemicellulose, 39-42%, 20-25% and 25-27% respectively. so it is can be used as a sugar source in many processes. lignin and hemicellulose must be removed before hydrolysis of cellulose. several different pretreatment approaches have been studied. the purpose of this research is comparison of acid, ozone and combination of ozone-acid as pretreatme...

• Waste cooking oil was considered as feedstock for biodiesel production. Kinetic data were derived from actual WCO samples avoiding model components. Aluminum chloride hexahydrate is a promizing catalyst the esterification step. Reactive distillation with alkali used transesterification. In this work, novel method proposed conversion of waste into biodiesel. A two-step approach based on pretre...

Soo-Yeon Kim, Sung-Min Park, Kwang-Soo Ji-Eun Lee, Da-Hee An, Dong-Chil Jang and Young-Lok Cha. Korean Society for Biotechnology Bioengineering Journal 2022;37:166-74. https://doi.org/10.7841/ksbbj.2022.37.4.166