Material and Energy Conversion of Integrated 100,t/a-Scale Bio-Jet Fuel-Range Hydrocarbon Production System via Aqueous Conversion of Biomass [PDF]
以农业废弃物生物质为原料,利用水相转化技术,进行了百吨/年规模生物航油类烃(C8~C15)合成试运行.过程中采用两步酸解法分别将玉米秸秆中半纤维素和纤维素转化为糠醛和乙酰丙酸,作为生物质基平台化合物.在碱性条件下糠醛与乙酰丙酸经Aldol缩合反应实现碳链增长,生成的长链含氧中间体经过低温预加氢、高温加氢脱氧及精制,生成C8~C15范围内液态烃,可作为生物航油组分.以试运行实验结果为基础,进行了过程的物质与能量转化分析.结果表明,该路线获得液态烃类的基本性质满足合成航油ASTM-7566标准要求 ...
刘琪英 +8 more
core +1 more source
Effects of Biochar Application on Nitrogen and Phosphorus Availability in Soils: aReview [PDF]
利用生物炭在贫瘠的土壤上培育出肥沃的"黑土"正成为土壤学家研究的热点.氮、磷等大量养分是衡量土壤肥力高低的重要指标,生物炭对其有效性影响表现出极大的复杂性.不同研究得出的结论不尽相同,关键是缺乏对其机制的深入研究.由于氮和磷的不合理利用还可能造成非点源污染而带来环境风险,再加之生物炭施用的不可逆性,必须确保生物炭在任何情况下都不会对土壤和环境带来不利的影响.为此,本文综述了生物炭添加对氮肥和磷肥在土壤-植物系统迁移转化过程中的作用,重点讨论了不同生物炭处理方式对土壤磷素吸附解吸和形态转化的影响 ...
张友 +4 more
core +1 more source
Effects of Continuous Straw Returning Combined with Reduced Fertilizer Application on Rice Yield and Loss of Nitrogen and Phosphorus [PDF]
[Objective] The effects of straw returning combined with reduced chemical fertilizer application on rice yield and nitrogen and phosphorus losses with runoff were studied in order to provide a scientific basis for the recycling and reuse of local ...
Liang Fan +8 more
core +1 more source
Characteristics of inorganic ions and organic components in PM_(2.5) from biomass burning [PDF]
为探讨生物质在明火和阴燃两种不同条件下PM_(2.5)及主要成分的排放差异,选取了7种具有代表性的生物质样品(小麦、水稻、马尾松叶、马尾松枝、杂; 草、玉米、棉花)进行了燃烧实验,并对PM_(2.5)样品中的7种主要水溶性离子(Na~+、NH_4~+; 、K~+、Ca~(2+)、Cl~-、NO_3~- 、SO_4~(2-))及有机碳(OC) 、元素碳(EC) 、水溶性有机碳(WSOC); 、有机酸和左旋葡聚糖(LG)等有机成分进行了分析.结果表明,明火和阴燃条件下PM_(2.5)的排放因子分别为2.82~
吴水平 +5 more
core +1 more source
Effects of Different Mulching Measures on Distribution of Organic Carbon and Inorganic Carbon in Soil Aggregates Under Spring Maize Cultivation [PDF]
[Objective] The effects of different mulching methods on the distribution of organic and inorganic carbon in soil aggregates on the Loess Plateau, and the mechanism under which soil aggregates sequester carbon under mulched conditions were determined in ...
Li Meng +8 more
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水热条件下Fe-resin在NaCl溶液中对稻草的水解 [PDF]
在水热条件下利用Fe-resin在Na Cl溶液中对稻草(RS)进行水解,以稻草的转化率以及还原糖(TRS)、平台化合物乙酰丙酸(LA)的收率为考察指标,探讨了影响稻草水解的因素,如反应器、稻草的目数、反应温度、反应时间、固液比、固固比、制备Fe-resin的Fe Cl3的浓度和Na Cl的用量。筛选出稻草水解的最佳反应条件为水热反应釜、0.2 g 40~60目稻草、0.15 g 10%的Fe Cl3制备的Fe-resin、反应温度200℃、反应时间5 h、固液比1∶150(g∶m L)、固固比4∶3 ...
杨惠, 贾立山
core +1 more source
Long-term straw incorporation significantly reduced subsoil organic carbon stock in cinnamon soil [PDF]
peer ...
Xu, Hu +5 more
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TBAB Semi-Clathrate Hydrate Formation and its Application in CO2Separation from CO2/CH4Mixture Gases [PDF]
水合物法气体分离技术是一种新型的CO2分离方法,不同的分离条件对CO2气体分离的效果影响显著。四丁基溴化铵(TBAB)的添加能显著改善CO2/CH4混合气水合物的相平衡条件,促进CO2水合物的生成。作者主要研究在质量浓度为40%的TBAB水溶液体系中,压力为3.2MPa下,不同过冷度及气水比例的条件对CO2/CH4混合气水合物的生成过程及CO2的分离效果的影响规律。实验结果表明,当压力为3.2MPa时,气水比越小,CO2分离效果越好。同时 ...
吴能友, 梁德青, 臧小亚
core +1 more source
Greenhouse gas emissions from croplands of China [PDF]
China possesses cropland of 1.33 million km 2. Cultivation of the cropland not only altered the biogeochemical cycles of carbon (C) and nitrogen (N) in the agroecosystems but also affected global climate.
Bohan, Liao +13 more
core +1 more source
Study on the Sulfonation of Straw Powder and The Application as High-effect Water Reducer [PDF]
农作物秸秆中富含纤维素、半纤维素、木质素等光合作用产物,目前没有得到很好利用,是值得开发的可再生生物资源库。2015年我国的秸秆产生量将达到9亿多吨。焚烧秸秆不仅浪费资源,而且加重了雾霾等环境污染。因此,开发以秸秆等天然可再生资源为原料的减水剂等高附加值产品,对保护环境、推动生态产业的发展及减少化石类资源的消耗意义重大。 本论文利用本课题组开发的三氧化硫/1,2-二氯乙烷体系,开发了以不经分离和纯化的秸秆粉为原料,合成水溶性混合生物高分子硫酸单酯盐新工艺。成功获得了具有很好水溶性 ...
阙元昌
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