Ni-loaded HZSM-5 catalyst

Toluene cracking to H2

Calcination atmosphere tunes support acid sites and metal states; metallic Ni markedly enhances C–C and C–H bond cleavage, boosting selective H2 production from toluene cracking.

Zhuqing, Niu · Qinlong, Hu · Haoyang, Lou · Jiankai, Zhang · Xinjia, Wang · Hui, Jin · Bu, Zhongming · Li, Guoneng · Tang, Yuanjun · Ye, Chao

Fuel 2027

Specifications

Toluene conversion

{'zh': '75.50', 'en': '75.50'} %

Advantages

Reaches 75.50% conversion

The Ni-modified catalyst achieves a toluene conversion of 75.50%, the highest among all compared catalysts.

Metallic Ni cleaves bonds directly

Under N₂ calcination, Ni exists in metallic form and exhibits strong ability to cleave C–C and C–H bonds, thus increasing H₂ yield.

Air calcination reduces diffusion resistance

Citric acid modification combined with air calcination significantly increases the average mesopore diameter, reducing mass diffusion resistance and enhancing catalytic activity.

N₂ calcination increases acid sites

Calcination in N₂ atmosphere increases the acid sites of the catalyst, thereby promoting the catalytic activation of toluene.

Applications

• Biomass tar cracking for H2：Used for catalytic cracking of toluene as a biomass tar model compound to produce hydrogen.
• Hydrogen production：Produces H₂ from toluene cracking; Ni-based catalyst enhances yield.
• Catalytic cracking：The catalyst is used for catalytic cracking of toluene to optimize conversion efficiency.
• Zeolite catalysts：HZSM-5 zeolite serves as the catalyst support, modified and loaded with metals.