The synthesis of Pt supported on zeolite 5A beads for the decarboxylation of oleic acid to heptadecane is demonstrated. The use of a microporous ZIF-67 crystalline layer on zeolite 5A beads not only improved the heptadecane selectivity but also, most importantly, improved the stability of the resultant catalyst. Heptadecane yields as high as ∼81% were observed for the fresh catalysts. The catalysts displayed only low to moderate loss of catalytic activity after two rounds of recycle. To our best knowledge, the catalytic performance of these catalysts is superior to those of the state-of-the-art catalysts at mild reaction conditions. In addition, as compared to powders, beads are much easier to recycle, can be fully recovered, and are more amenable for potential scale-up. The resultant catalysts are promising for the catalytic conversion of fatty acid molecules into gasoline/diesel-range hydrocarbons.
A novel
concept of utilizing nanoporous coatings as effective nanovalves on
microporous adsorbents was developed for high capacity natural gas
storage at low storage pressure. The work reported here for the first
time presents the concept of nanovalved adsorbents capable of sealing
high pressure CH4 inside the adsorbents and storing it
at low pressure. Traditional natural gas storage tanks are thick and
heavy, which makes them expensive to manufacture and highly energy-consuming
to carry around. Our design uses unique adsorbent pellets with nanoscale
pores surrounded by a coating that functions as a valve to help manage
the pressure of the gas and facilitate more efficient storage and
transportation. We expect this new concept will result in a lighter,
more affordable product with increased storage capacity. The nanovalved
adsorbent concept demonstrated here can be potentially extended for
the storage of other important gas molecules targeted for diverse
relevant functional applications.
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