Ni -chitosan/carbon nanotube: An efficient biopolymer -inorganic catalyst for selective hydrogenation of acetylene

Siye Tang; Liying Li; Xinxiang Cao; Qingqing Yang

doi:10.1016/j.heliyon.2023.e13523

Ni -chitosan/carbon nanotube: An efficient biopolymer -inorganic catalyst for selective hydrogenation of acetylene

Heliyon. 2023 Feb 8;9(2):e13523. doi: 10.1016/j.heliyon.2023.e13523. eCollection 2023 Feb.

Authors

Siye Tang¹, Liying Li², Xinxiang Cao¹, Qingqing Yang¹

Affiliations

¹ College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China.
² Henan Pingmei Shenma Dongda Chemistry Co., Ltd, Kaifeng 475003, China.

Abstract

This work developed an efficient Ni catalyst based on chitosan for selective hydrogenation of acetylene. The Ni catalyst was prepared by the reaction of the chitosan/carbon nanotube composite with NiSO₄ solution. The synthesized Ni-chitosan/carbon nanotube catalyst was characterized by inductively coupled plasma, FTIR, SEM and XRD. The results of FTIR and XRD demonstrated that Ni²⁺ successfully coordinated with chitosan. The addition of chitosan greatly improved the catalytic performances of Ni-chitosan/carbon nanotube catalyst. Over the Ni-chitosan/carbon nanotube catalyst, both the acetylene conversion and the selectivity to ethylene all achieved 100% at 160 °C and 190 °C, respectively. The catalytic performances of 6 mg Ni-chitosan/carbon nanotube catalyst were even better than that of 400 mg Ni single atom catalyst in literature. Extending the crosslinking time of chitosan and increasing the amount of the crosslinking agent were beneficial to enhance the catalytic effect of Ni-chitosan/carbon nanotube catalyst.

Keywords: Acetylene hydrogenation; Chitosan; Conversion; Heterogeneous catalysis; Nickel.