Table 1 Hydrodeoxygenation of MCP over various catalysts.

Entry	Catalyst	T_calcination (°C)^a	Conversion (%)	S_MCPD (%)^b	S_MCPE (%)^b	S_MCPO (%)^b	S_HDE (%)^b	S_HE (%)^b	S_Others (%)^b	Yield of MCPD (%)
1	MoO₃	600	98	18	37	2	17	10	16	18
2	15wt.%MoO₃/ZnO	600	99	71	7	3	5	1	13	70
3	15wt.%MoO₃/Al₂O₃	600	93	20	20	4	9	2	45	19
4	15wt.%MoO₃/ZrO₂	600	91	32	2	6	2	1	57	29
5	15wt.%MoO₃/SiO₂	600	99	32	18	1	19	2	28	32
6	15wt.%V₂O₅/ZnO	600	82	38	7	1	2	2	50	31
7	15wt.%WO₃/ZnO	600	69	36	10	11	4	1	39	25
8	15wt.%Fe₂O₃/ZnO	600	53	30	6	16	2	1	45	16
9	15wt.%CuO/ZnO	600	77	27	9	16	2	1	45	21
10	10wt.%MoO₃/ZnO	600	100	64	7	2	5	1	21	64
11	20wt.%MoO₃/ZnO	600	97	58	13	4	8	1	16	56
12	15wt.%MoO₃/ZnO	400	99	57	14	2	10	2	15	56
13	15wt.%MoO₃/ZnO	500	99	68	8	3	6	2	13	67
14	15wt.%MoO₃/ZnO	700	96	50	10	7	10	4	19	48
15^c	15wt.%MoO₃/ZnO	600	0	0	0	0	0	0	0	0
16^d	15wt.%MoO₃/ZnO	600	99	42	18	1	12	2	26	42

Reaction conditions: T = 400 °C, PH₂ = 0.1 MPa, weight hour space velocity (WHSV) = 0.23 (g g⁻¹ h⁻¹), the initial H₂/MCP molar ratio = 40, liquid products were collected after the reaction was carried out under investigated conditions for 3 h.
^aT_calcination: the calcination temperature used in the preparation of catalyst.
^bS_MCPD: Selectivity of methylcyclopentadiene. S_MCPE: Selectivity of methylcyclopentene. S_MCPO: Selectivity of 3-methylcyclopentanone. S_HDE: Selectivity of hexadienes. S_HE: Selectivity of hexenes. S_Others: Selectivity of the other by-products (include benzene, C₁₂ oligomers, and the gaseous products (e.g., CH₄, C₂H₄, C₂H₆, and C₃H₆ etc.)) generated during the reaction.
^cFor comparison, the reaction was carried in a nitrogen atmosphere under the same conditions as we used for the hydrodeoxygenation of MCP.
^dThe direct synthesis of MCPD using HD and H₂ as a feed under the same conditions as we used for the hydrodeoxygenation of MCP.

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