The reactions of a strain of marine alga Chlorococcum sp. and of a polystrain containing a mixture of marine algae with CO/H 2 O have been studied. The yields and chemical composition of the products obtained from the reactions with CO/ H 2 O were compared with those using N 2 and H 2 . The effects of selected potential catalysts (Na 2 CO 3 , NaAlO 2 , and Fe) and the water-to-algae ratio on the product yields and composition when the reactions were carried out under CO/H 2 O are also described. Both algae gave high product yields at 285 °C, but the quality of the product as a liquid fuel increased at higher temperature. The reactions with CO/H 2 O tended to give higher oil yields and higher-quality products (lower nitrogen, higher atomic H/C ratio) than those using H 2 or N 2 and, in addition, reduced the amount of dewatering of the algae that is required.

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