Understanding the Effect of Different Biomass Ash Additions on Pyrolysis Product Distribution, Char Physicochemical Characteristics, and Char Gasification Reactivity of Bituminous Coal

Wei Juntao; Guo Qinghua; Ding Lu; Gong Yan; Yu Junqin; Yu Guangsuo

首页> 外文期刊>Energy & fuels >Understanding the Effect of Different Biomass Ash Additions on Pyrolysis Product Distribution, Char Physicochemical Characteristics, and Char Gasification Reactivity of Bituminous Coal

【24h】

Understanding the Effect of Different Biomass Ash Additions on Pyrolysis Product Distribution, Char Physicochemical Characteristics, and Char Gasification Reactivity of Bituminous Coal

机译：了解不同生物质灰分添加量对烟煤的热解产物分布，焦炭理化特性和焦炭气化反应性的影响

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相似文献
相关主题

摘要

In this study, two typical biomass ash additives, rice straw ash (RSA), high K and high Si and cotton stalk ash (CSA, high K-Ca-Na and low Si), were adopted as natural and effective catalysts to systematically investigate the influence of biomass ash type on pyrolysis product distribution, char physicochemical characteristics (i.e., chemical forms and concentrations of alkaline and alkaline earth metals (AAEMs), pore structure, and carbon structure), and char gasification reactivity of bituminous coal. The results of pyrolysis product distribution show that RSA additive resulted in an increase of tar yield and decrease of char yield during coal pyrolysis, whereas CSA additive led to a decrease of tar yield and increase of gas yield in coal pyrolysis. The RSA additive had little impact on the gaseous product yields of coal pyrolysis, but the CSA additive obviously enhanced H-2, CO, and CO(2 )yields of coal pyrolysis and slightly inhibited the CH4 yield of coal pyrolysis. The results of char physicochemical properties demonstrate that RSA and CSA additives were conducive to increasing active AAEM content and specific surface area of coal char and decreasing order degree of the coal char carbon structure. Moreover, the CSA additive showed a more significant positive effect on the coal char physicochemical properties. The results of gasification reactivity indicate that biomass ash additives stimulated coal char gasification, and the CSA additive showed a more prominent promotion effect, in accordance with the positive effect of biomass ash additives on active AAEM, pore structure, and carbon structure of coal char. The RSA and CSA additives resulted in the activation energy reduction of coal char gasification by 13.95 and 57.99 kJ.mol(-1), respectively.

机译：在这项研究中，采用两种典型的生物质灰分添加剂，稻草灰（RSA），高钾高硅和棉秆灰（CSA，高钾钙钠和低硅）作为天然和有效的催化剂进行系统地研究生物质灰分类型对热解产物分布，炭的理化特性（即碱金属和碱土金属的化学形式和浓度，孔结构和碳结构）以及烟煤的炭化反应性的影响。热解产物分布的结果表明，在煤热解过程中，RSA添加剂导致焦油收率提高，焦炭产率降低，而CSA添加剂导致煤热解焦油产量降低而气产率提高。 RSA添加剂对煤热解的气态产物收率影响不大，但CSA添加剂明显提高了煤热解的H-2，CO和CO（2）收率，并略微抑制了煤热解的CH4收率。炭的理化性质结果表明，RSA和CSA添加剂有利于提高活性炭的AAEM含量和比表面积，降低炭结构的有序度。此外，CSA添加剂对煤焦的物化性质表现出更显着的积极作用。气化反应性结果表明，生物质灰分添加剂刺激了煤焦气化，而CSA添加剂表现出更突出的促进作用，这与生物质灰分添加剂对煤焦的活性AAEM，孔结构和碳结构的积极作用相一致。 RSA和CSA添加剂分别使煤焦气化的活化能降低了13.95和57.99 kJ.mol（-1）。

著录项

来源
《Energy & fuels》 |2019年第4期|3068-3076|共9页
作者
Wei Juntao; Guo Qinghua; Ding Lu; Gong Yan; Yu Junqin; Yu Guangsuo;
展开▼
作者单位

East China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai 200237, Peoples R China;

East China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai 200237, Peoples R China;

Tokyo Inst Technol, Dept Environm Sci & Technol, Midori Ku, 4259 Nagatsuta Cho, Yokohama, Kanagawa 2268503, Japan;

East China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai 200237, Peoples R China;

East China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai 200237, Peoples R China;

East China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai 200237, Peoples R China|Ningxia Univ, State Key Lab High Efficiency Coal Utilizat & Gre, Coll Chem & Chem Engn, Yinchuan 750021, Peoples R China;

展开▼
收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词

相似文献

外文文献
中文文献
专利

1. Characteristics of high temperature C-CO2 gasification reactivity of Victorian brown coal char and its blends with high ash fusion temperature bituminous coal [J] . Dai Baiqian, Hoadley Andrew, Zhang Lian Fuel . 2017,第aUGa15期

机译：维多利亚褐煤炭及其与高灰熔融温度烟煤的混合物的高温C-CO2气化反应特性。
2. Physicochemical structure and gasification reactivity of co-pyrolysis char from two kinds of coal blended with lignocellulosic biomass: Effects of the carboxymethylcellulose sodium [J] . Wu Zhigiang, Yang Wangcai, Meng Haiyu, Applied Energy . 2017,第deca1期

机译：两种煤与木质纤维素生物质混合共热解焦炭的理化结构和气化反应性：羧甲基纤维素钠的影响
3. Influence of Biomass Ash Additive on Reactivity Characteristics and Structure Evolution of Coal Char-CO_2 Gasification [J] . Wei Juntao, Gong Yan, Ding Lu, Energy & fuels . 2018,第10期

机译：生物质灰分添加剂对煤焦CO_2气化反应特性和结构演变的影响
4. Study on Co-pyrolysis Impact on Co-gasification Reactivity of Biomass and Coal Blended Char and Synergy Behavior during Co-gasification [C] . Xia Liu, Juntao Wei, Yifei Wang, 2017 international Pittsburgh coal conference . 2017

机译：共热解对生物质和煤焦共气化反应性的影响及共气化过程中的协同行为
5. Structural Characteristics and CO2 Reactivity of Partially Gasified Pittsburgh No. 8 Coal Chars Generated in a High-Pressure, High-Temperature Flow Reactor [D] . Krishnamoorthy, Vijayaragavan. 2018

机译：在高压，高温流量反应器中产生部分气化匹兹堡的结构特征和CO2反应性。
6. Co-Gasification of Cow Manure and Bituminous Coal:A Study on Reactivity Synergistic Effect and Char Structure Evolution [O] . Meng Ma, Jiaofei Wang, Xudong Song, 2020

机译：牛粪和烟煤的联合气化：反应性协同效应和炭结构演变的研究
7. This article presents a new numerical model describing the behaviour of a thermally thick wood sample exposed to high solar heat flux (above 1 MW/m2). A preliminary study based on dimensionless numbers is used to classify the problem and support model building assumptions. Then, a model based on mass, momentum and energy balance equations is proposed. These equations are coupled with liquid-vapour drying model and pseudo species biomass degradation model. By comparing to a former experimental study, preliminary results have shown that these equations are not enough to accurately predict biomass behaviour under high solar heat flux. Indeed, a char layer acting as radiative shield forms on the sample exposed surface. In addition to this classical set of equations, it is mandatory to take into account radiation penetration into the medium. Furthermore, as biomass contains water, medium deformation consecutively to char steam gasification must also be implemented. Finally, with the addition of these two strategies, the model is able to properly capture the degradation of biomass when exposed to high radiative heat flux over a range of sample initial moisture content. Additional insights of biomass behaviour under high solar heat flux were also derived. Drying, pyrolysis and gasification fronts are present at the same time inside of the sample. The coexistence of these three thermochemical fronts leads to char gasification by the steam produced from drying of the sample, which it is the main phenomenon behind medium ablation. [O] . Pozzobon, Victor, Salvador, Sylvain, Bézian, Jean Jacques 2018

机译：本文提供了一个新的数值模型，该模型描述了暴露于高太阳热通量（高于1 / MW / m2）的热厚木材样品的行为。基于无量纲数的初步研究用于对问题进行分类并支持模型构建假设。然后，提出了一种基于质量，动量和能量平衡方程的模型。这些方程式与液体蒸汽干燥模型和假物种生物质降解模型耦合。通过与以前的实验研究进行比较，初步结果表明，这些方程不足以准确预测高太阳热通量下的生物量行为。的确，在样品暴露的表面上形成了充当辐射屏蔽层的炭层。除了这套经典的方程式之外，还必须考虑到辐射向介质的渗透。此外，由于生物质中含有水，因此还必须在炭蒸气汽化后进行连续的介质变形。最后，通过添加这两种策略，该模型能够在一定范围的样品初始水分含量下暴露于高辐射热通量的情况下，正确捕获生物质的降解。还得出了在高太阳热通量下生物量行为的其他见解。样品内部同时存在干燥，热解和气化前沿。这三个热化学前沿的共存会导致样品干燥产生的蒸汽产生焦炭气化，这是介质烧蚀的主要现象。

Understanding the Effect of Different Biomass Ash Additions on Pyrolysis Product Distribution, Char Physicochemical Characteristics, and Char Gasification Reactivity of Bituminous Coal

摘要

著录项

相似文献

相关主题

期刊订阅