CAJ | 학술논문

以玉米秸秆、树枝和树叶3种生物质废弃物为原料,分别采用差热/热重分析(TG/DTG)、红外光谱(FT-IR)、Boehm 滴定及 X 射线衍射(XRD)方法考察热解温度为350,550,750℃时制备的生物质炭结构及组成特征。结果表明：玉米秸秆原料的热稳定性最低,热解过程中质量损失最大,其次是树枝和树叶；玉米秸秆原料的 XRD 谱弥散程度最大,构成炭的微晶层数相对较少；不同原料在相同温度制备的生物质炭,其单位质量含有的表面官能团种类和总量相近,但 pH 值差别较大,其中玉米秸秆制成的生物质炭 pH 最大；随着温度的升高,相同原料制备生物质炭的芳香化程度增加,表面官能团总量减少,pH 值升高,纤维素和半纤维素特征峰消失,结构趋于石墨微晶。
이옥미갈간、수지화수협3충생물질폐기물위원료,분별채용차열/열중분석(TG/DTG)、홍외광보(FT-IR)、Boehm 적정급 X 사선연사(XRD)방법고찰열해온도위350,550,750℃시제비적생물질탄결구급조성특정。결과표명：옥미갈간원료적열은정성최저,열해과정중질량손실최대,기차시수지화수협；옥미갈간원료적 XRD 보미산정도최대,구성탄적미정층수상대교소；불동원료재상동온도제비적생물질탄,기단위질량함유적표면관능단충류화총량상근,단 pH 치차별교대,기중옥미갈간제성적생물질탄 pH 최대；수착온도적승고,상동원료제비생물질탄적방향화정도증가,표면관능단총량감소,pH 치승고,섬유소화반섬유소특정봉소실,결구추우석묵미정。
Biomass charcoals were made from 3 kinds of biomass wastes,maize straw,branches and leaves trees at 350,550,750 ℃,respectively.The structure and composition characteristics of biomass charcoals were characterised by thermogravimetric analysis,FT-IR analysis,Boehm titration and X-ray diffraction analysis.The results show that maize straw has the lowest thermal stability and the highest mass loss,followed by those of the branches and leaves.Compared with branches and leaves, maize straw has the greatest dispersion degree in X-ray diffraction with a less layer number of microcrystalline.The total quantity of surface functional groups in biomass charcoals made from different feedstocks at the same temperature is similar,the pH value has larger differences and biochars derived from maize straw have the highest pH value.Results of characterization of biochars derived from the same feedstock show that with the increase of pyrolysis temperature, the aromatization degree of biochars increases;the content of surface functional groups decreases;pH value increases;the characteristic peaks of cellulose and hemicellulose disappear;the structure of biomass charcoals tends to graphite crystallite structure.