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运用催化轻汽油醚化技术,能有效的提升汽油质量,使汽油的辛烷值得到提高,也增加了汽油的氧含量。它利用来自汽油中的叔碳烯烃与甲醇进行醚化反应生成醚类化合物。催化会使汽油的烯烃含量降低,同时提高汽油辛烷值和降低蒸汽压,还能将低价值的甲醇转化成高价值的汽油组分。 相似文献
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《石油工业技术监督》2016,(3)
轻汽油醚化单元涉及蒸汽压高、易挥发的轻质馏分和有毒、易挥发的甲醇物质,其项目建设存在较大的环境风险。以某催化汽油醚化项目为例,对石化轻汽油醚化项目可能存在的火灾危险、有毒有害风险、污水及固体废物排放污染风险以及噪声污染风险等方面的环境风险源、风险程度及需要采取的技术措施进行分析,提出石化轻汽油醚化项目应从总体上对有关环境风险进行判断,并从项目建设期的项目建设地址、工艺及设施设备配置,以及项目运营期的风险管理方面制定相应的风险策略和应对措施。结果表明,探讨石化轻汽油醚化项目环境风险管理问题,可以引起更多有关人员的关注,采取措施后可降低和消灭环境事故的发生。 相似文献
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黄富 《石油化工技术经济》2014,(5)
探讨了催化裂化装置各种主要工艺参数对汽油产品中烯烃含量的影响及机理,提出了在2500 kt/a催化裂化装置上,通过逐渐调整操作参数,降低催化裂化汽油烯烃含量的措施。通过提高催化剂活性、降低反应温度、降低原料预热温度、提高烃分压、提高第二反应区催化剂藏量、注入终止剂、提高剂油比、延长反应时间、提高汽油终馏点等措施,可以有效降低催化裂化装置汽油产品中烯烃体积分数8.1个百分点。 相似文献
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丁二烯是一种重要的石油化工基础有机原料和合成橡胶单体,在石油化工烯烃原料中的地位仅次于乙烯和丙烯,在合成橡胶和有机合成等方面具有广泛的用途,可以合成顺丁橡胶、丁苯橡胶、丁腈橡胶、SBS、ABS树脂等多种橡胶产品,此外还可用于生产己二腈、己二胺、尼龙66、1,4-丁二醇等有机化工产品,以及用作粘接剂、汽油添加剂等,用途十分广泛. 相似文献
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一催化装置和二催化装置从2009年12月13日开始配炼蜡油加氢装置的精制蜡油,实现了蜡油加氢处理与催化裂化装置联合优化生产,本文就催化原料加氢预处理对催化生产操作、汽油硫含量和产品分布的影响进行分析,提出催化裂化与蜡油加氢装置联合生产的优化措施。生产数据表明,催化原料加氢预处理后,汽油硫含量满足汽油质量升级要求,催化产品分布良好。 相似文献
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产圣 《石油化工技术经济》2010,26(1):15-18
以焦化汽油作为参比对象,采用静态和动态两种评价方法,对催化裂解装置主分馏塔一级冷后汽油在加氢脱硫过程中的结焦性进行了评价。从静态挂片结焦增重、动态反应前后动态测试管出口油样温差、烯烃减少幅度等方面的情况来看,催化裂解装置主分馏塔一级冷后汽油的结焦倾向小于焦化汽油。 相似文献
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介绍了第二代催化裂化汽油选择性加氢脱硫技术(RSDS-Ⅱ技术)在催化汽油选择性加氢装置中的应用。标定结果表明,以硫含量460~470μg/g、烯烃含量40%左右的催化裂化汽油为原料,采用RSDS-Ⅱ技术后,产品硫含量小于50μg/g,研究法辛烷值损失小于1.0。RSDS-Ⅱ技术具有非常好的脱硫选择性,是生产低硫清洁汽油的重要技术。 相似文献
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《Telecommunications Policy》2014,38(5-6):415-425
There is an ongoing discussion in the market which Next Generation Access (NGA) architecture best suits future needs and which investment and cost differences exist. The discussion can be subsumed as P2P vs. GPON, which is somewhat misleading as this article reveals. The discussion is driven by the fact that the high capital cost and the long asset life time of fibre mean that the technology choices made today will dominate the opportunities for telecommunication business of all market players, incumbents, competitors, content providers and business and residential users for many years in the future.The paper analyzes the cost and other differences between Fibre-to-the-Home (FTTH) access network architectures and their related different wholesale approaches by using the well-known and understood steady state approach applied in other NGA analyses in the past. In addition to the steady state analysis a dynamic cost evaluation is included taking into account the different investment behaviour of the FTTH architectures over time. The results describe investment and cost differences between architectures, incumbents and wholesale based competitive operators. The analysis has been performed for different geotypes (clusters) of decreasing population density in a representative European settlement structure. 相似文献
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In indigenous communities the nutrition transition characterized by a rapid westernization of diet and lifestyle is associated with rising prevalence of chronic disease. Field work and literature reviews from two different policy environments, Argentina (Jujuy) and Canada (Nunavut), identified factors that add to indigenous peoples’ disease risk. The analytical framework was the emerging human right to adequate food approach to policies and programmes. Indigenous peoples’ chronic disease risk tends to increase as a result of government policies that infringe on indigenous peoples’ livelihoods and territories, undermining their economic system, values and solidarity networks. Policies intended to increase food security, including food aid, may also fuel the nutrition transition. There is a need to explore further the connection between well-intended policies towards indigenous peoples and the development of chronic diseases, and to broaden the understanding of the role that different forms of discrimination play in the westernization of their lifestyles, values and food habits. Food policies that take due account of indigenous peoples’ human rights, including their right to enjoy their culture, may counteract the growth of chronic disease in these communities. 相似文献
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:CGI( Common Gateway Interface)是应用程序与 Web服务器交互的一个标准接口 ,利用该技术可以实现 HTML不具备的交互式主页功能。本文将通过“教育窗”主页的访问 (点击 )计算器的开发应用实例 ,提出了两种使用 CGI技术实现点击计数的方案 相似文献
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钻井现场H2S气体的探测及防护 总被引:2,自引:0,他引:2
王建勋 《石油工业技术监督》2003,19(11):10-12
在钻井生产过程中,实施HSE管理体系,预防和控制H2S,保护每一位员工不受H2S气体危害,是钻井生产过程中HSE工作的重要一环。阐述了有害气体H2S的物理特性、毒性标准,介绍了几种常用的H2S气体探测器,以及具体操作方法。 相似文献
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A strategic skill based model of supplier integration and its effect on supply management performance 总被引:1,自引:0,他引:1
Supplier integration is a tool to help organizations gain competitive advantage. Strategic supply management skills and the supply management function's perceived status are hypothesized as antecedents to supplier integration leading to supply management performance. The sample for this study includes 152 executive level supply management professionals. The empirical results suggest that strategic skills and perceived status are essential antecedents to supplier integration and subsequent performance. Further, the relationship between strategic skills and performance is mediated by supplier integration. Results of a dominance analysis also suggest which strategic skills are most likely to explain status integration, and performance. These findings have significant implications for supply management theory and practice. 相似文献
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The paper focuses on third generation wireless technologies and on alternative technologies for wireless local area networks. The authors present the evolutionary migration path from second to third generation systems. Technological, economic and behavioral factors related to decision-making towards the migration are proposed. As an example, the paper studies the case of the national incumbent operator of India. It analyzes qualitatively the migration problem from the perspective of the operator, the equipment manufacturer and the users. For the quantitative analysis, real options are used to value the investment decisions. The analysis suggests that the initial (sunk) investment cost, the average revenue per user, the growth of the subscriber base and the volatility of the markets are the key factors in the investment process. 相似文献
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A consistent theme in cross-cultural management research is that collectivists are more cooperative than individualists. We
use Hofstede's measure for individualism–collectivism and combine it with an experimental measure of cooperation to test this
relationship in China. In contrast to the established paradigm, we find that groups with higher individualistic scores are
more cooperative than those groups with higher collectivistic scores. We attribute these results to groups being composed
of outgroup members. In addition, we find that subjects from the more developed coastal area are more individualistic and
cooperative than are subjects from inland China.
Bradley J. Koch , PhD, is a Teaching Fellow at Nanyang Technological University. His research is focused on China where he studies a variety of topics including cognitive institutional environments, foreign direct investment, social capital, gender, and Internet and society. Pamela Tremain Koch , PhD, is an Assistant Professor in the School of Communication and Information, Nanyang Technological University. Her current research is focused on organisational communication, conflict management, internet, work, and society as well as information communication technologies and development. 相似文献
Bradley J. KochEmail: |
Bradley J. Koch , PhD, is a Teaching Fellow at Nanyang Technological University. His research is focused on China where he studies a variety of topics including cognitive institutional environments, foreign direct investment, social capital, gender, and Internet and society. Pamela Tremain Koch , PhD, is an Assistant Professor in the School of Communication and Information, Nanyang Technological University. Her current research is focused on organisational communication, conflict management, internet, work, and society as well as information communication technologies and development. 相似文献
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This study estimates cost-based prices for wholesale voice and data services provided to 3G (WCDMA) MVNOs according to their distinct types. For estimation, 3G MVNOs are classified into different types, and the overall cost of WCDMA facilities are separated into voice and data components based on their subscriber rates, actual traffic rates, as well as efficiency consideration of traffic rates. The study then calculates cost-based wholesale prices of voice and data services for each of the 3G MVNO types. The result of this study shows that a cost-plus pricing scheme can help achieve the policy goals of the regulator, namely, lowering telecommunications tariffs and facilitating the introduction of new convergent-type services, far more effectively than the current retail-minus pricing scheme. The findings of this study may assist firms in developing business models based on 3G networks and telecom regulators in designing policies related to interconnection, mVoIP, prepaid calls, wholesale services, and network neutrality. 相似文献