Syngas production from glycerol-dry(CO2) reforming over La-promoted Ni/Al2O3 catalyst

RENEWABLE ENERGY

卷:74

Article

Siew, Kah Weng¹  Lee, Hua Chyn¹  Gimbun, Jolius¹  Chin, Sim Yee¹  Khan, Maksudur R.¹  Taufiq-Yap, Yun Hin²  Cheng, Chin Kui¹ 

[1] Univ Malaysia Pahang, Fac Chem & Nat Resources Engn, Ctr Excellence Adv Res Fluid Flow, Kuantan 26300, Pahang, Malaysia

[2] Univ Putra Malaysia, Catalysis Sci & Technol Res Ctr, Fac Sci, Upm Serdang 43400, Selangor, Malaysia

关键词: Glycerol;    Dry reforming;    Lanthanum;    Nickel catalyst;    Syngas;   

DOI  :  10.1016/j.renene.2014.08.048

来源: Elsevier

【 摘 要 】

A 3 wt% La-promoted Ni/Al2O3 catalyst was prepared via wet co-impregnation technique and physicochemically-characterized. Lanthanum was responsible for better metal dispersion; hence higher BET specific surface area (96.0 m(2) g(-1)) as compared to the unpromoted Ni/Al2O3 catalyst (85.0 m(2) g(-1)). In addition, the La-promoted catalyst possessed finer crystallite size (9.1 nm) whilst the unpromoted catalyst measured 12.8 nm. Subsequently, glycerol dry reforming was performed at atmospheric pressure and temperatures ranging from 923 to 1123 K employing CO2-to-glycerol ratio from zero to five. Significantly, the reaction results have yielded syngas as main gaseous products with H-2:CO ratios always below than 2.0 with concomitant maximum 96% glycerol conversion obtained at the CO2-to-glycerol ratio of 1.67. In addition, the glycerol consumption rate can be adequately captured using power law modelling with the order of reactions equal 0.72 and 0.14 with respect to glycerol and CO2 whilst the activation energy was 35.0 kJ mol(-1). A 72 h longevity run moreover revealed that the catalyst gave a stable catalytic performance. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

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