Conversion of Gracilaria gracilis (G. gracilis) into bio-products was carried out via pyrolysis at different temperatures to determine its potential for phenol-rich bio-oil. Co-Mo supported on zeolites (HZSM-5), mesoporous (HMS) catalysts and their composites (ZH) were investigated and compared to each other on catalytic pyrolysis processes. In non-catalytic tests, the maximum weight percentage of bio-oil was 42 wt% at 500 degrees C and had the maximum amount of phenol (6.28 wt%). in the catalytic tests by ZH composites; the addition of zeolite content in the structure of composites significantly decreased total concentrations of acetic acid and formic acid from 9.56 to 8.12 wt% and slightly decreased phenol and furfural concentrations from 6.65 and 6.98 to 5.88 and 5.49 wt%, respectively. Furthermore, the best selectivity for hydrogen yield (6.08 mmol/g macroalgae) and lowest amount of acetic acid (5.4 wt%) was observed for CoMo/ZH-20 catalyst, that is synthesized by 20 wt% of zeolite. (C) 2017 Elsevier Ltd. All rights reserved.