CAJ | 학술논문

为获得较低温度下生物质焦油高效裂解气化的廉价型催化剂，基于褐煤富含含氧官能团特点，通过离子交换法将镍负载到胜利褐煤上制备褐煤负载镍催化剂(Ni/ SLC)。研究了溶液 pH 值和炭化温度对催化剂物理化学性质的影响，得到 Ni/ SLC 催化剂最佳制备条件，最后在两段式移动床石英反应器中将催化剂用于玉米芯挥发分的催化气化，研究了催化剂对生成气产量和碳平衡的影响。结果表明：pH 值为11，炭化温度为650℃时制备的 Ni/ SLC 比表面积最大达到266.3 m2/ g，镍微晶尺寸较小为5.0 nm。催化气化实验表明：650℃下 Ni/ SLC 催化剂具有高的焦油裂解活性，气体产量高达43.9 mmol/ g，相当于无催化实验气体总产量的3.3倍；水蒸气气化可将热解焦油完全气化，气体产量为85.1 mmol/ g，H2产量高达61.9 mmol/ g，占气体总量的72.7％，说明 Ni/ SLC 催化剂可作为生物质催化气化制氢的潜在催化剂。
위획득교저온도하생물질초유고효렬해기화적렴개형최화제，기우갈매부함함양관능단특점，통과리자교환법장얼부재도성리갈매상제비갈매부재얼최화제(Ni/ SLC)。연구료용액 pH 치화탄화온도대최화제물이화학성질적영향，득도 Ni/ SLC 최화제최가제비조건，최후재량단식이동상석영반응기중장최화제용우옥미심휘발분적최화기화，연구료최화제대생성기산량화탄평형적영향。결과표명：pH 치위11，탄화온도위650℃시제비적 Ni/ SLC 비표면적최대체도266.3 m2/ g，얼미정척촌교소위5.0 nm。최화기화실험표명：650℃하 Ni/ SLC 최화제구유고적초유렬해활성，기체산량고체43.9 mmol/ g，상당우무최화실험기체총산량적3.3배；수증기기화가장열해초유완전기화，기체산량위85.1 mmol/ g，H2산량고체61.9 mmol/ g，점기체총량적72.7％，설명 Ni/ SLC 최화제가작위생물질최화기화제경적잠재최화제。
In order to prepare low price and high active catalyst for biomass tar pyrogasification,based on the rich oxygen-containing spe-cies in lignite,a kind of novel catalyst was prepared by loading nickel on Shenli lignite char via ion-exchange.The effects of solution pH and carbonization temperature on the physic-chemical properties of catalyst was studied.The research determined the optimum operation condition of Ni/ SLC catalyst.Then the catalyst was used in two-stage moving-bed gasification of corn cob in quartz tube reactor.The influ-ence of catalyst on gas yield and carbon balance was investigated.The results showed that,the catalyst prepared in the pH of 11 at 650 ℃reached the maximum SSA of 266.3 m2 / g and the nickel particles dispersed quite well in the catalyst with the NCS of 5.0 nm.It effectively improved tar decomposition at 650 ℃ under inert atmosphere and produced a tar-free syngas in a yield of 43.9 mmol/ g,which were 3.3 times of the total gas yield without catalyst.The gasification of coal tar with steam was thorough.The gas yield were 85.1 mmol/ g,the H2 yield were 61.9 mmol/ g,which were 72.7% of the total gas yield.So the Ni/ SLC catalyst was suitable for the gasification of biomass.