Activation of Mo/HZSM-5 for methane aromatization

Modeling and Design Optimization of Multifunctional Membrane Reactors for Direct Methane Aromatization

Due to the recent increase of natural gas production in the U.S., utilizing natural gas for higher-value chemicals has become imperative. Direct methane aromatization (DMA) is a promising process used to convert methane to benzene, but it is limited by low conversion of methane and rapid catalyst deactivation by coking. Past work has shown that membrane separation of the hydrogen produced in th...

(y = 2−5) with Methane

Aromatization of cyclohexanecarboxylic acid.

An enzyme which catalyzes the aromatization of cyclohexanecarboxyl coenzyme A has been isolated from whole liver as well as from liver mitochondria. Incubation of the soluble, partially purified enzyme with cyclohexanecarboxyl-CoA produces cyclohexene-l-carboxyl-CoA, benzoyl-CoA, and a polar compound which has not. been further characterized. All three isomers of cyclohexenecarboxyl-CoA are con...

Activation of methane using solid oxide membranes

Dense membranes of mixed-conducting perovskite-type oxides Lao.sSro.4Co,,8Fe,,,0~ and Lac,aBa&oo.aFe,,,O~ were used for methane coupling by application of pressure-driven O2 permeation. High operating temperatures, typically above 8OO”C, were needed to obtain reasonable oxygen fluxes. Conversions were small (l-3%). Both compositions showed comparable C2 selectivities at low methane partial pres...

Biological aromatization of steroids.

The conversion of androgenic steroids to the phenolic estrogens by mammalian tissue has been well documented. The reaction has been reported in relatively low yield, in vitro with ovarian and placental slices (l-3), and in viva after the administration of androgens to various species including man (4, 5). The present report describes the conversion of androgens to estrogens in high yield by a s...