Synthetic fuels from biomass. Photocatalytic hydrodecarboxylation of octanoic acid by Ni nanoparticles deposited on TiO2

ChemSusChem ◽  
2021 ◽  
Author(s):  
Xiangze Du ◽  
Yong Peng ◽  
Josep Albero ◽  
Dan Li ◽  
Changwei Hu ◽  
...  
ChemSusChem ◽  
2021 ◽  
Author(s):  
Xiangze Du ◽  
Yong Peng ◽  
Josep Albero ◽  
Dan Li ◽  
Changwei Hu ◽  
...  

Author(s):  
V.A. Munoz ◽  
R.J. Mikula ◽  
C. Payette ◽  
W.W. Lam

The transformation of high molecular weight components present in heavy oils into useable liquid fuels requires their decomposition by means of a variety of processes. The low molecular weight species produced recombine under controlled conditions to generate synthetic fuels. However, an important fraction undergo further recombination into higher molecular weight components, leading to the formation of coke. The optical texture of the coke can be related to its originating components. Those with high sulfur and oxygen content tend to produce cokes with small optical texture or fine mosaic, whereas compounds with relatively high hydrogen content are likely to produce large optical texture or domains. In addition, the structure of the parent chemical components, planar or nonplanar, determines the isotropic or anisotropic character of the coke. Planar molecules have a tendency to align in an approximately parallel arrangement to initiate the formation of the nematic mesophase leading to the formation of anisotropic coke. Nonplanar highly alkylated compounds and/or those rich in polar groups form isotropic coke. The aliphatic branches produce steric hindrance to alignment, whereas the polar groups participate in cross-linking reactions.


1982 ◽  
Vol 32 ◽  
pp. 17-17
Author(s):  
Stephen R. Lefevre

Political scientists are increasingly interested in understanding policymaking in civilian, defense and space technologies. The answer to the question why this is, is found partly in the emergence of the policy field itself, and partly in the enormously expanded role that government stimulus of technological innovation is playing in the public and private sectors. A listing of some recent programs — breeder and fusion reactor R&D, the space shuttle, windmill farm demonstration programs, synthetic fuels programs, and dial-a-ride transportation systems — gives some indication of the scope of federal involvement, and points up some of the implications that this enlarged role has for the student of public policy. Why, for instance, has government elected to stimulate innovations in certain technologies and not others? Who are the key actors shaping the policymaking process in R&D? Are their gaps in federal efforts? Is the policy system responding effectively to needs for renewable energy sources, alternative home building materials, gasoline-efficient automobile engines, etc?


1948 ◽  
Vol 173 (2) ◽  
pp. 773-783 ◽  
Author(s):  
Albert L. Lehninger ◽  
Sylvia.Wagner. Smith

Author(s):  
Sonil Nanda ◽  
Falguni Pattnaik ◽  
Venu Babu Borugadda ◽  
Ajay K. Dalai ◽  
Janusz A. Kozinski ◽  
...  

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