Synthesis Gas Production with NiO鈭扢gO/纬-Al2O3/Cordierite Monolithic Catalysts in a Pilot-Scale Biomass-Gasification-Reforming System

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• 作者：Tiejun Wang ; Yuping Li ; Chenguang Wang ; Xinghua Zhang ; Longlong Ma ; Chuangzhi Wu
• 刊名：Energy & Fuels
• 出版年：2011
• 出版时间：March 17, 2011
• 年：2011
• 卷：25
• 期：3
• 页码：1221-1228
• 全文大小：937K
• 年卷期：v.25,no.3(March 17, 2011)
• ISSN：1520-5029

文摘

A pilot-scale biomass-gasification-reforming system (feedstock of 150鈭?00 kg/h, on a dry basis) was established to produce synthesis gas for liquid fuel synthesis. The design and operation of this system were preliminarily discussed. Reforming of biomass raw fuel gas over NiO鈭扢gO/纬-Al₂O₃/cordierite monolithic catalysts was investigated in a multi-tube reformer. The anti-coking and anti-sintering properties of NiO鈭扢gO/纬-Al₂O₃/cordierite monolithic catalysts were characterized. The results showed that the NiO鈭扢gO/纬-Al₂O₃/cordierite monolithic catalyst with a pore channel size of 7 脳 7 mm could continuously deal with biomass raw fuel gas containing large amounts of fly ash. No channel blocking was observed for a long time running. The pressure drop of the reformer was only below 700 Pa even under the conditions of fuel gas velocity of 1.4 m/s and fly ash content of 330 g N^鈭? m^鈭? in the raw fuel gas. The synthesis gas [H₂ + CO > 60 vol %, H₂/CO ratio = 0.9鈭?.0, and lower heating value (LHV) > 10 MJ N^鈭? m^鈭?] could be produced by the biomass-gasification-reforming process under the conditions of total equivalence ratio (ER_T) of 0.27 (ER_first of 0.23, ER_second of 0.02, and ER_third of 0.02) and steam/biomass (S/B) ratio of 0.4. The cold gas efficiency was above 82%. The characterization of the spent catalysts by thermogravimetric (TG), X-ray diffraction (XRD), and inductively coupled plasma鈭抋tomic emission spectrometry (ICP鈭扐ES) analyses indicated that the NiO鈭扢gO solid solution structure in the catalyst could restrain the active Ni⁰ centers from agglomeration and decrease carbon deposition. No serious alkali compound deposition on the surface of the catalyst was detected after the 60 h time-on-stream test. The pilot-scale biomass-gasification-reforming system exhibited excellent operation stability and flexibility.