نتایج جستجو برای: bio compounds chemicals
تعداد نتایج: 314312 فیلتر نتایج به سال:
For the first time, this work investigates achievability of developing a biorefinery concept around almond hulls by hydrothermal treatment (HTT), thoroughly scrutinising influence temperature (200–300 °C), pressure (100–180 bar), time (20–180 min) and solid loading (5–25 wt%). This process allowed conversion into four main products: gas (2–13%), bio-oil (2–12%), aqueous (4–69%) hydro-char (17–8...
Fast pyrolysis of biomass is a well-known opportunity for sustainable alternative fuel production transport and energy. However, bio-oils from are viscous, acidic bio-crudes that need further steps upgrading before being used either as fuels or chemicals. A process complementary to bio-oil hydrotreatment co-processing consists optimizing tuning the upstream condensation fast separate concentrat...
The transformation of lignocellulosic biomass into bio-based commodity chemicals is technically possible. Among thermochemical processes, fast pyrolysis, a relatively mature technology that has now reached a commercial level, produces a high yield of an organic-rich liquid stream. Despite recent efforts to elucidate the degradation paths of biomass during pyrolysis, the selectivity and recovery...
The great demand for, and impending depletion of petroleum reserves, the associated impact of fossil fuel consumption on the environment, and volatility in the energy market have elicited extensive research on alternative sources of traditional petroleum-derived products such as biofuels and bio-chemicals. Fossil oil is largely associated with gasoline, however, approximately 6000 petroleum-der...
A series of previously conducted experiments pertaining to various chemicals and drugs uncover a natural linkage between the molecular structures and the bio-medical and pharmacological characteristics. The forgotten topological index computed for the molecular structures of various chemical compounds and drugs has proven significant in medical and pharmaceutical fields by predicting biological...
As one of the most abundant materials in nature, lignin has been used widely in co-generation operations and for fine chemicals and bio-fuels production. These uses, although important, are of relatively low value. Lignin contains many aromatic compounds with useful structures, and it is potentially more profitable to produce high-value fine chemicals from the low-molecular weight lignin fracti...
For the first time, this work addresses hydrodeoxygenation (HDO) of lignocellulosic bio-oil over a carbon–neutral Mo2C/CNF catalyst for production liquid biofuels and value-added chemicals, thoroughly examining effect temperature, initial H2 pressure, reaction time catalyst/bio-oil ratio. These variables had significant influence on process, allowing transformation original into different fract...
Valorization of agri-food residues to produce bio-based platform chemicals will enhance the transition bio-economy era. To this end, a sustainable process has been developed for overall valorization grape stalks (GS) according circular approach, starting from lignin fraction further deal with cellulose-rich residue. This non-conventional protocol fully adheres green chemistry principles, exploi...
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