From your link, it appears that the hydrocarbon claim was for Venus rather than an ice-cold blob like Titan.
From the link:
I offered a series of claims that naturally followed from the reconstruction. In science they are usually called predictions, but I prefer to term them advance claims. Thus I claimed that Venus, due to its recent birth and dramatic though short history, must be very hot under the clouds, nearly incandescent, and gives off heat—it has not reached thermal balance; that it must have every massive atmosphere; that the atmosphere consisted largely of hydrocarbons but that if oxygen is present petroleum fires must be burning—thus explaining also the present massive carbon dioxide content of the atmosphere; that sulfur and iron (ferruginous pigment) must be present too; and that if the same catalytic process that took place on the Earth when it was enveloped by clouds of Venus’ origin takes place in Venus’ own clouds, they must consist mainly of organic material infused with sulfur and iron molecules. Further, I considered that Venus was disturbed in its rotation.
http://www.spitzer.caltech.edu/Media/happenings/20061010/
Planets, Comets, Asteroids, hydrocarbons everywhere...
From its lofty perch in space, Spitzer was in the perfect position to scrutinize the cometary material ejected from comet Tempel 1. The sensitive telescope’s spectrometer instrument detected dust particles finer than human hair, and discovered the presence of silicates (crushed rock or sand), carbonates (chalk), smectite (clay), metal sulfides (like fool’s gold), amorphous carbon (soot), and polycyclic aromatic hydrocarbons (carbon-rich molecules found on barbecue grills and in automobile exhaust on Earth).
http://www.universetoday.com/2007/07/06/spongey-hyperion-coated-with-hydrocarbons/
One of the most bizarre objects in the Solar System has got to be Saturn’s moon Hyperion. From the pictures taken by Cassini, this tiny moon looks like a sponge you might buy at the Body Shop. In a new research paper appearing in the July 5 issue of the journal Nature, scientists have mapped the surface of Hyperion, and found hydrocarbons...