Performance of active nickel loaded lignite char catalyst on conversion of coffee residue into rich-synthesis gas by gasification. Issue 2 (April 2018)

• Record Type: Journal Article
• Authors: Chaiklangmuang, Suparin; Li, Liuyun; Kannari, Naokatsu; Takarada, Takayuki
• Is Part Of: Journal of the Energy Institute. Volume 91:Issue 2(2018)
• Page Start: 222
• Page End: 232
• Publication Date: 2018-04
• Subjects: Gasification -- Coffee residue -- Nickel -- Syngas -- Lignite; Power (Mechanics) -- Periodicals; Power resources -- Periodicals; Fuel -- Periodicals; 621.04205
• DOI: 10.1016/j.joei.2016.12.002
• Languages: English
• ISSNs: 1743-9671

Abstract

Abstract: Performance of nickel-loaded lignite char catalyst on conversion of coffee residue into synthesis gas by catalytic steam gasification was carried out at low reaction temperatures ranging from 500 °C to 650 °C in the two-stage quartz fixed bed reactor. The effects of steam pressures (30, 36 and 50 kPa corresponding to S/B = 2.23, 2.92 5.16, respectively) and catalyst to biomass ratios (C/B ratio = 0, 1, 3) were considered. Nickel-loaded lignite char was prepared as a catalyst with a low nickel loading amount of 12.9 wt%. The gas yields in the catalytic steam gasification process strongly depended on the reaction temperature and C/B ratio. The total gas yields obtained in catalytic steam gasification was higher than that of catalytic pyrolysis, steam gasification and non-catalytic pyrolysis with steam absence by factors of 3.0, 3.8 and 7.7, respectively. To produce the high synthesis gas, it could be taken at 600 °C with total gas yields of 67.13 and 127.18 mmol/g biomass-d.a.f. for C/B ratios of 1.0 and 3.0, respectively. However, the maximum H2 /CO ratio was 3.57 at a reaction temperature of 600 °C, S/B of 2.23 and C/B of 1.0. Considering the conversion of coffee residue by catalytic steam gasification using the nickel-loaded lignite char catalyst, it is possible to covert the coffee residue volatiles into rich synthesis gas. Highlights: To covert the coffee residue volatiles into syngas. Nickel-loaded lignite char, 12.9 wt% Ni, was prepared as a catalyst. The maximum H2 /CO ratio was 3.57.