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1.
提出一种电石渣资源化利用的新方法．首先,将燃煤电站烟气通入电石渣浆液捕集 CO2．碳酸化后的电石渣浆液（CCSS）干燥后在钙循环中作为吸收剂捕集 CO2．在双固定床反应器和热重仪上研究了 CCSS和电石渣的 CO2捕集特性,包括碳酸化时间、煅烧温度和碳酸化温度对 CCSS 循环碳酸化特性的影响．结果表明 CCSS 的 CO2捕集性能和碳酸化速率均高于电石渣．煅烧温度为950℃时,CCSS 比电石渣具有更好反应活性,这有利于在恶劣煅烧条件下捕集 CO2．在700～725℃,CCSS 表现出了最佳的碳酸化性能．煅烧CCSS 比电石渣孔隙结构更好,具有更大比表面积和比孔容,这有利于循环捕集 CO2． 相似文献
2.
赵欣 《邯郸职业技术学院学报》2008,21(2)
设计了不同尺寸和内构件的反应器,系统研究主要结构参数,包括内外筒直径比、反应器高径比、内筒上方液面高度和底隙高度以及操作参数通气量对该磁铁流化床反应器处理水结果的影响。实验分析主要过程参数如气含率、液体循环速度、氧传递系数及混合时间与结构参数、操作参数的相关性。为反应器的结构放大和性能变化预测提供理论基础。 相似文献
3.
以氢为原料的燃料电池是一种洁净高效的能源.简要介绍了乙醇水蒸气重整制氢的热力学分析以及乙醇水蒸气重整的反应机理;简要概述了乙醇水蒸气重整制氢的动力学,系统论述了乙醇水蒸气重整制氢反应中的Ni系催化剂的研究进展,并展望了Ni系催化剂的研究前景. 相似文献
4.
实验采用单因素试验优化纳豆菌液体发酵条件。通过蛋白凝块溶解时间法测定纳豆激酶活力,筛选出最佳培养条件。液态发酵选用甘油、乳糖以及木糖与葡萄糖的混合糖代替基础培养基中的麦芽糖;用酵母膏、干酪素、胰蛋白胨和黄豆汁代替基础培养基中的麸皮进行发酵产酶试验,筛选出最佳碳氮源,并在此基础上变换不同的碳、氮源浓度,筛选出最佳的碳、氮比。试验结果表明：液态发酵最佳条件为,甘油10％,酵母膏2％,明胶0．5％,NaCl 0．5％,KH2PO4 0．1％,K2HPO4 0．4％,MgSO4 0．05％,初始pH7．0。在此条件下培养,测得的纳豆激酶活力相当于尿激酶1081．22IU／mL。与此前报道结果800．50IU／mL相比有了明显的提高。 相似文献
6.
曾小梅 《金华职业技术学院学报》2012,12(6):57-61
利用餐厨垃圾进行生物制氢,不仅可解决餐厨垃圾的处置问题,而且可以产生清洁的氢能,已成为当前国内外学者研究的热点之一。了解了餐厨垃圾产氢机理及底物特性、工艺条件、产氢茵种、反应器类型等应用化技术在餐厨垃圾制氢中的应用现状。展望了餐厨垃圾制氢的研究应针对高效混合产氢菌种的选育和改造、各种生态因子对餐厨垃圾产氢茵群影响的研究．并进行新的餐厨垃圾制氢工艺和高效、规模化的餐厨垃圾生物制氢反应器的开发。 相似文献
7.
CH4的重整反应对天然气工业和生态环保有着决定性的影响,科学实验研究发现CH4有多种途径可以转化为合成气(CO和H2),其机理和可行性不尽相同.针对不同途径,从催化剂积碳、反应条件、产率等多方面进行对比分析,比较水蒸气重整、自热重整和二氧化碳重整的优缺点,对实验研究具有一定的指导意义. 相似文献
8.
SBR法处理模拟印染废水的实验研究 总被引：1，自引：0，他引：1
采用实验室规模的序批式活性污泥曝气反应器（SBR）工艺处理模拟的印染废水．通过实验分析了不同曝气时间、进水浓度、静沉时间与SBR处理效果之间的关系,确定了SBR法处理中低浓度的印染废水的最佳运行参数．实验结果表明,在SBR的曝气时间为8h,沉淀时间为1h的条件下,且废水进水pH值为7．5～8．6,COD—cr为8901080mg／L、氨氮为13～20mg／L、色度为350倍左右时,该工艺对CODcr、氨氮、色度等均有很好的去除效果,经处理的印染废水COD、氨氮、色度去除率分别为50％～70％、40％～67％、20％．该法具有投资少、运行费用低、操作简单的特点． 相似文献
9.
在超声波作用下，用甲醇浸提，从云南大花红景天中提取红景天苷和酪醇，以红景天苷和酪醇的转移率为评价指标，利用正交试验L16（4^5）筛选出最佳的提取条件为：提取温度65℃，提取时间15min，90％甲醇或无水甲醇和1：20料液比，按最佳提取条件，实验6次，红景天苷和酪醇的质量分数分别达到0．56g／mg和0.15g／mg，相对标准偏差为2．56％和3．52％． 相似文献
10.
宋广治 《重庆第二师范学院学报》2000,13(3):63-65,73
本文阐述了和微型化学实验铁架台“和”微型化学实验仪器“的性能及特点，研制出的配套Ｍ．Ｌ．仪器可完成中学所有的演示实验、学生实验；可做并进实验及展开化学课外活动。这套Ｍ．Ｌ．仪器也可用于大一的普化实验，该仪器的操作规范与现行中学教学大纲完全吻合。 相似文献
11.
A bottoming cycle system based on CO2 Brayton cycle is proposed to recover the engine exhaust heat. Its performance is compared with the conventional air Brayton cycle under five typical engine conditions. The results show that CO2 Brayton cycle proves to be superior to the air Brayton cycle in terms of the system net output power, thermal efficiency and recovery efficiency. In most cases, the recovery efficiency of CO2 Brayton cycle can be higher than 9% and the system has a better performance at the engine’s high operating load. The thermal efficiency can be as large as 24.83% under 100% operating load, accordingly, the net output power of 14.86 kW is obtained. 相似文献
12.
Zhi Huang Zhao-bo Chen Nan-qi Ren Dong-xue Hu Dong-huan Zheng Zhen-peng Zhang 《浙江大学学报(A卷英文版)》2009,10(11):1642-1650
To improve the working and living environment of submarine crews, an integrated system of CO2 removal and O2 regeneration was designed to work under experimental conditions for 50 people in a submarine cabin during prolonged voyages. The integrated system comprises a solid amine water desorption （SAWD） unit for CO2 collection and concentration, a Sabatier reactor for CO2 reduction and a solid polymer electrolyte （SPE） unit for O2 regeneration by electrolysis. The performances of the SAWD-Sabatier-SPE integrated system were investigated. The experimental results from the SAWD unit showed that the average CO2 concentration in the CO2 storage tank was more than 96% and the outlet CO2 concentration was nearly zero in the first 45 min, and less than 1/10 of inlet CO2 after 60 min when input CO2 was 0.5% （1000 L）. About 950 L of CO2 was recovered with a recovery rate of 92%-97%. The output CO2 concentration was less than 0.2%, which showed that the adsorption-desorption performance of this unit was excellent. In the CO2 reduction unit we investigated mainly the start-up and reaction performance of the Sabatier reactor. The start-up time of the Sabatier reactor was 6, 8 and 10 rain when the start-up temperature was 187.3, 179.5 and 168 ℃, respectively. The product water was colorless, transparent, and had a pH of 6.9-7.5, and an electrical conductivity of 80μs/cm. The sum of the concentration of metal ions （Ru^3＋, Al^3＋, Pb^2＋） was 0.028% and that of nonmetal ions （Cl^-, SO4^2-） was 0.05%. In the O2 regeneration unit, the O2 generation rate was 0.48 m^3/d and the quantity was 2400 L, sufficient to meet the submariners＇ basic oxygen demands. These results may be useful as a basis for establishing CO2-1evel limits and O2 regeneration systems in submarines or similar enclosed compartments during prolonged voyages. 相似文献
13.
LI Wei ZHU Xin-jian CAO Guang-yi 《浙江大学学报(A卷英文版)》2007,8(5):734-740
This paper describes a solar photovoltaic fuel cell (PVEC) hybrid generation system consisting of a photovoltaic (PV) generator, a proton exchange membrane fuel cell (PEMFC), an electrolyser, a supercapacitor, a storage gas tank and power conditioning unit (PCU). The load is supplied from the PV generator with a fuel cell working in parallel. Excess PV energy when available is converted to hydrogen using an electrolyser for later use in the fuel cell. The individual mathematical model for each component is presented. Control strategy for the system is described. MATLAB/Simulink is used for the simulation of this highly nonlinear hybrid energy system. The simulation results are shown in the paper. 相似文献
14.
雷玉勇 《重庆大学学报(英文版)》2003,2(1)
1. Introduction With the development of transportation, more and more road tunnels, especially the long tunnels, such as Erlangshan Tunnel (4176 m, China), Arlberg Tunnel (13972 m, Austria), Kan-etsu Tunnel (11055 m, South tube, Japan) and Laerdal Tunnel (24510m, Norway) have been built on the highway lines [1]. In a road tunnel, the exhaust gases given off by automobile engines, such as smoke, carbon monoxide (CO), oxynitride (NOx), hydrocarbon, etc., and dust produced by the passing a… 相似文献
15.
Increasingly high requirement driven by environmental concern leads to more rigorous standards for sulfur dosage in fuel. Natural gas desulfurization is an important unit for industrial natural gas process. Catalytic membrane reactor for sulfur compounds removal is a newly emerged and integrated membrane technology. We reviewed the current progress for desulfurization of natural gas with membrane process, and predicted that the process combined with catalytic membrane reactor and microwave irradiation for desulfurization of natural gas might be an integrated and promising unit for large scale desulfurization with high efficiency. 相似文献
16.
INTRODUCTION Catalytic reforming of naphtha or mixture of naphtha with a certain amount of cracking oil is a process of great interest to the petrochemical industry for the production of aromatic compounds that are raw materials for plastics, elastomers and resins manufacture. Catalytic reforming unit uses naphtha or cracking oil as feedstock to produce rich aromatic compounds and high octane value liquid products through reactions such as aromatization, cyclization, and hydrocracking. At… 相似文献
17.
用旋转反应器合成纳米碳酸钙的研究 总被引：1，自引：0，他引：1
以自行研制的打孔碟片为填料，利用pH计及电导率仅确定氢氧化钙在旋转反应器中的碳化时间，用超滤膜分离氢氧化钙与碳酸钙；探讨了气体浓度、转速、分散剂等操作条件对碳化过程的影响，结果表明：氢氧化钙与二氧化碳反应生成纳米碳酸钙的过程中，气体浓度、转速、分散剂影响反应时间、产品粒度及粒度分布；利用旋转反应器制备出平均体积当量直径为30—40cm，粒度分布很窄的菱形纳米碳酸钙，而且在碳化过程中，碳酸钙不易在碟片填料中结垢。 相似文献
18.
设计了基于V2X(Vehicle To Everything,车与外界的信息交换)技术的自动泊车系统.该系统由人机交互单元、信号引导单元、车载泊车单元3部分构成.人机交互单元负责输入操作指令和采集存储用户身份信息,信号引导单元负责提供泊车路径信息与停车信号,车载泊车单元负责控制车辆运行.该系统具有一键存取、身份验证、车位记忆等功能,可用于传统车辆和无人驾驶汽车,是一种新型自动泊车系统. 相似文献
19.
This paper presented a control design methodology for a proton exchange membrane fuel cell （PEMFC） generation system for residential applications. The dynamic behavior of the generation system is complex in such applications. A compre- hensive control design is very important for achieving a steady system operation and efficiency. The control strategy for a 60 kW generation system was proposed and tested based on the system dynamic model. A two-variable single neuron proportional-integral （PI） decoupling controller was developed for anode pressure and humidity by adjusting the hydrogen flow and water injection. A similar controller was developed for cathode pressure and humidity by adjusting the exhaust flow and water injection. The desired oxygen excess ratio was kept by a feedback controller based on the load current. An optimal seeking con- troller was used to trace the unique optimal power point. Two negative feedback controllers were used to provide AC power and a suitable voltage for residential loads by a power conditioning unit. Control simulation tests showed that 60 kW PEMFC generation system responded well for computer-simulated step changes in the load power demand. This control methodology for a 60 kW PEMFC generation system would be a competitive solution for system level designs such as parameter design, performance analysis, and online optimization. 相似文献