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Uji Aktifitas Katalis NaOH/Ni/gamma Al2O3 pada Proses Transesterifikasi Minyak Kelapa Sawit 检测油棕榈油变性过程中的催化剂NaOH/Ni/gamma Al2O3的活性
Pub Date : 2021-09-01 DOI: 10.33536/jcpe.v6i1.899
Alda Titania Dewanti, M. Fitrah, Budi Setiawan, A. Suryanto, Rismawati Rasyid
Biodiesel merupakan salah satu bahan bakar alternatif. Biodiesel dapat dibuat dari minyak sawit dan bahan baku lainnya. Penelitian ini bertujuan mempelajari pengaruh katalis (NaOH/Ni/γ-Al2O3) pada reaksi transesterfikasi minyak kelapa sawit terhadap persentase rendemen biodiesel, densitas, persentase etil ester, serta konversi asam lemak bebas dari produk biodiesel dari minyak kelapa sawit. Proses pembuatan biodiesel melalui transesterifikasi minyak kelapa sawit dengan pereaksi etanol pada suhu 60oC dengan penambahan katalis NaOH/Ni/γ-Al2O3 . Setelah waktu reaksi yang ditentukan, produk biodiesel didiamkan selama 24 jam ini bertujuan agar terjadi pemisahan antara sisa etanol, dan gliserol. Berdasarkan hasil penelitian dan pengolahan data yang telah dilakukan, produk biodiesel terbaik pada penelitian ini adalah produk dengan persentase katalis 4% dan waktu reaksi 3 jam. Produk biodiesel ini, menghasilkan persentase rendemen sebesar 94,26% dan persentase etil ester sebesar 89,21% dan nilai konversi FFA sebesar 85,28%.
生物柴油是一种替代燃料。生物柴油可以由棕榈油和其他原料制成。这项研究旨在研究催化剂的影响(NaOH - Ni -γ-Al2O3)在transesterfikasi棕榈油反应百分比rendemen生物柴油,密度脂肪酸自由转换、乙醇以斯帖的百分比从棕榈油生物柴油产品。通过transesterifikasi棕榈油生产生物柴油的过程与温度的乙醇60oC试剂添加催化剂NaOH / Ni /γ-Al2O3。在确定的反应时间后,生物柴油产品静音24小时,目的是将乙醇和甘油的剩余部分分开。根据所作的研究和数据处理,本研究中使用的最好的生物柴油产品为4%的催化剂百分比和3小时的反应时间。这种生物柴油产品产生了94.26%的表现率和etil ester的百分比为89.21%,反皈依率为85.28%。
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引用次数: 0
Operability and Flexibility of Pinch Applications on Heat Exchanger Network in Chemical Industry – A Review 化工换热网络夹点应用的可操作性和灵活性综述
Pub Date : 2021-09-01 DOI: 10.33536/jcpe.v6i1.897
Levina Mandalagiri, A. Irawan, S. Yani
Energy conservation has recently become one of the most important considerations in industries, especially in petrochemical industries. This is due to the limited availability of fuel which affects the price of energy sources, as well as the tightening of the regulations concerning environmental and social issues related to pollutant emissions produced by industries. The successful energy-saving efforts made by industries impact on not only lowering production costs but also indirectly preserving natural resources as well as reducing the pollution of CO2 which is one of the gases contributing to global warming. Pinch analysis has been widely known for process integration, especially in heat integration, in order to gain energy efficiency and cost efficiency in many industries for decade. The analysis allows selection of efficient heat exchanger network with minimum hot and cold energy requirement. By using pinch analysis, the number of heat exchanger units required could also be minimized which leads to the optimum cost of operational and investment. Pinch analysis is also allowing for the investigation of any pinch problems, such as pinch threshold problems, cross pinch problems, and problems related to incorrect placement of utilities which impacted to the wastefulness of energy consumption. Despite many success studies of highly potential saving of heat integration through pinch analysis, the real implementation of efficient and effective heat exchanger network (HEN) based on pinch analysis is still facing difficulties, for example in term of flexibility and controllability of operation.  This paper provides preliminary information in increasing energy efficiency or energy savings when utilizing pinch technology considering operability and flexibility of its operation for retrofitting units for chemical industrial plants.
近年来,节能已成为工业,特别是石油化工行业的重要考虑因素之一。这是由于燃料供应有限,影响到能源的价格,以及有关工业产生的污染物排放的环境和社会问题的条例收紧。成功的工业节能不仅降低了生产成本,还间接地保护了自然资源,减少了二氧化碳的污染,二氧化碳是导致全球变暖的气体之一。为了提高能源效率和成本效益,掐点分析在许多行业的过程集成,特别是热集成中得到了广泛的应用。通过分析,可以选择冷热能需求最小的高效换热器网络。通过夹点分析,还可以使所需的热交换器单元数量最小化,从而达到最优的运行成本和投资成本。夹点分析还允许调查任何夹点问题,例如夹点阈值问题、交叉夹点问题以及与影响能源消耗浪费的公用事业的不正确放置有关的问题。尽管通过捏点分析成功地研究了热集成的高潜力节约,但基于捏点分析的高效换热器网络(HEN)的真正实施仍然面临着困难,例如在运行的灵活性和可控性方面。本文就利用夹点技术在化工装置改造中考虑其操作的可操作性和灵活性,提高能效或节约能源提供了初步的信息。
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引用次数: 1
Produksi Bahan Bakar Cair Dari Limbah Plastik Polypropylene (PP) Metode Pirolisis 从聚丙烯塑料废弃物中产生液体燃料
Pub Date : 2021-09-01 DOI: 10.33536/jcpe.v6i1.689
H. Azis, Hanizah Batu Rante
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引用次数: 3
Production of Biodiesel from Edible Oils 从食用油生产生物柴油
Pub Date : 2021-01-01 DOI: 10.35248/2157-7048.21.12.423
R. Vijayaram
Energy is the key source of input to drive and improve the life cycle. The finiteness of fossil fuel has increased the demand for other sources. Biodiesels are promising alternative fuel and they are renewable. It has gained attention due to the smallness of fuels and environmental concern. The usage of liquid fuels prepared from used edible oil by transesterification process is one of the alternate methods for the use of fossil fuels. The recent focus relies on using used edible oil for producing biodiesel.
能源是驱动和改善生命周期的关键输入来源。化石燃料的有限性增加了对其他能源的需求。生物柴油是很有前途的替代燃料,而且是可再生的。由于燃料少和对环境的关注,它得到了关注。利用用过的食用油进行酯交换制备液体燃料是利用化石燃料的替代方法之一。最近的重点是利用用过的食用油生产生物柴油。
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引用次数: 1
Self-Evaluation of Industrial Case Studies with Iterative Improvements to Support Chemical and Biological Systems Engineering and Sustainability Teaching and Learning 工业案例研究的自我评价与迭代改进,以支持化学和生物系统工程和可持续教学
Pub Date : 2021-01-01 DOI: 10.35248/2157-7048.21.12.419
U. Tuzun
Industrial case studies play an increasingly important role in the teaching of systems engineering and sustainability within an industrial ecological framework utilising metacognitive and experiential learning principles. The principal classroom teaching tool of the experiential learning combines the student’s development of self-awareness and selfevaluation skills whilst they focus on providing optimal solutions to challenges provided by industrial case study examples. The learning process here relies on developmental and experiential learning with students attempting at iterative improvements to the industrial processes and plant operations being studied with a view to create a “best fit” to the efficiency of use of the resources at hand, specific ecological setting and circular economy constraints regarding recycle, re-use and regeneration of resources. Two alternative approaches of iterative case study evaluations are presented and compared here; one relying on the “bottom-up” approach to systems identification and development to enable the use of new material and energy resources and the other on a “top-down” approach to evaluate and improve an existing system of complex and integrated process plant operations. In each case, the student is challenged in an increasing order of complexity of issues through a self-learning and evaluation process which also requires the necessary deepening of engagement with the normative knowledge base comprising of core engineering and applied science teaching curricula. The additional benefit of the student-centered teaching and learning (see also Tuzun 2020 [8]) is the ability to draw upon core scientific and engineering science “hands-on”; as opposed to classic passive learning by lectures and tutorials in advance of any case study applications to real-life challenges.
工业案例研究在利用元认知和体验式学习原则的工业生态框架内的系统工程和可持续性教学中发挥着越来越重要的作用。体验式学习的主要课堂教学工具结合了学生自我意识和自我评估技能的发展,同时他们专注于为工业案例研究提供的挑战提供最佳解决方案。这里的学习过程依赖于发展性和体验性的学习,学生们尝试对正在研究的工业过程和工厂操作进行迭代改进,以期创造出“最适合”手头资源的使用效率、特定的生态环境和关于资源回收、再利用和再生的循环经济约束。本文提出并比较了迭代案例研究评估的两种替代方法;一种依赖于“自下而上”的方法来识别和开发系统,使新材料和能源的使用成为可能,另一种依赖于“自上而下”的方法来评估和改进现有的复杂和综合工艺工厂操作系统。在每种情况下,学生都要通过自我学习和评估过程,在问题的复杂性日益增加的顺序中受到挑战,这也需要必要的深入参与包括核心工程和应用科学教学课程在内的规范知识库。以学生为中心的教学和学习(参见Tuzun 2020[8])的额外好处是能够利用核心科学和工程科学“实践”;与传统的被动学习相反,在任何案例研究应用于现实生活挑战之前,都要先听讲座和辅导。
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引用次数: 0
Simulation and Ratio Control of Fluid Catalytic Cracking Unit 流体催化裂化装置的模拟与比例控制
Pub Date : 2021-01-01 DOI: 10.35248/2157-7048.21.12.420
D. F. Ahmed, Safa Khalaf Ateya
In this paper a novel ratio control scheme is proposed for fluid catalytic cracking unit. Based on a developed mathematical model, the dynamic simulator of a fluid catalytic unit is used to implement two schemes of ratio controller. The performance of the control scheme proposed here is tested using integral Absolut error. The results of simulation are successfully compared with the plant data. Comparison with PI controller, the ratio controller scheme one in maintaining controlled variables is very close to their set points. Here, with an application to a FCC unit of ratio control scheme one results obtained is found to be acceptable and it would be effectively used for improved process control of FCC in refinery process industry.
本文提出了一种新型的催化裂化装置比例控制方案。在建立数学模型的基础上,利用流体催化装置动态模拟器实现了两种比例控制方案。采用积分绝对误差对所提出的控制方案进行了性能测试。仿真结果与现场数据进行了比较。与PI控制器相比,比率控制器方案一在保持被控变量非常接近其设定点方面。通过在某催化裂化装置上的应用,发现所得结果是可以接受的,可以有效地用于炼油过程工业中催化裂化过程控制的改进。
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引用次数: 0
Cradle to Cradle Systems Analysis for Chemical and Biological Engineers: The Role of Progressive Sampling in Possibility Envelope for Value Added Manufacturing Design and Chemical Process Applications 为化学和生物工程师提供从摇篮到摇篮的系统分析:渐进式采样在增值制造设计和化学过程应用的可能性包络中的作用
Pub Date : 2021-01-01 DOI: 10.35248/2157-7048.21.12.421
U. Tuzun
The mathematical framework of the principles of holistic systems interactions is demonstrated by facilitating experiential learning with specific industrial case study examples. Two industrial case study examples are introduced as potential interactive teaching tools. Industrial case studies play an increasingly important role in the teaching of systems engineering and sustainability within an industrial ecological framework utilizing metacognitive and experiential learning principles. Each individual case study example makes use of the “closed loop” optimization of material and energy inflows and outflows to minimize waste and harmful environmental emissions. The attainment of the “closed loop” is achieved by facilitating successive progressive stages of materials and energy recovery and re-processing coupled with the re-utilization and regeneration of intermediate byproducts and waste from each successive processing stage. The options that can be exercised to minimize harmful environmental impacts are explored by progressive sampling within the possibility envelope. The learner is expected to demonstrate the systematic process of “narrowing down” of the options and choices through a decision making process starting off with the lead activity lifecycle which defines the outermost boundary of the possibility envelope. The scope of all possible actions and consequences is explored and reduced successively by the introduction and consideration of all other life cycles; progressing along a decision pathway that updates and integrates the considerations made under each of the materials and energy life cycles
整体系统相互作用原理的数学框架通过促进具体工业案例研究示例的体验式学习来演示。本文介绍了两个工业案例,作为潜在的互动教学工具。工业案例研究在利用元认知和体验式学习原则的工业生态框架内的系统工程和可持续性教学中发挥着越来越重要的作用。每个单独的案例研究示例都利用了材料和能源流入和流出的“闭环”优化,以最大限度地减少浪费和有害环境排放。实现“闭环”是通过促进材料和能源回收和再处理的连续渐进阶段,以及每个连续处理阶段的中间副产品和废物的再利用和再生来实现的。通过在可能性包络范围内逐步抽样,探索可用于尽量减少有害环境影响的选择。学习者需要通过一个决策过程来展示“缩小”选项和选择的系统过程,这个决策过程从定义可能性信封的最外层边界的主要活动生命周期开始。通过引入和考虑所有其他生命周期,探索和缩小所有可能的行动和后果的范围;沿着更新和整合每个材料和能源生命周期下的考虑因素的决策路径前进
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引用次数: 0
Process Safety Education: A Comparitive Study 过程安全教育:比较研究
Pub Date : 2021-01-01 DOI: 10.35248/2157-7048.21.12.422
R. Bos, P. Kouwenhoven
The immediate causes for the study are discussions with staff from multiple European Universities, articles and position papers of advisory committees and professional organization. They all express their worries about both the decline of education of process safety in the curricula of Chemical Engineering and the decline of research in process safety subjects
这项研究的直接原因是与多所欧洲大学的工作人员的讨论,咨询委员会和专业组织的文章和立场文件。他们都对化工课程中过程安全教育的减少和过程安全学科研究的减少表示担忧
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引用次数: 0
Pengaruh Penekanan Briket Limbah Kayu Merbau (Bayam) dengan Perekat Tapioka
Pub Date : 2020-12-20 DOI: 10.33536/JCPE.V5I2.659
Reza Bachmid, Halim Halim, Sabdha Purna Yudha, Arfan Halim
Saat ini sebagian besar energi yang digunakan rakyat indonesia berasal dari bahan bakar fosil, yaitu bahan bakar minyak, batu bara dan gas. Kerugian penggunaan bahan bakar fosil ini selain merusak lingkungan, juga tidak terbarukan dan tidak berkelanjutan Sehingga penulis menggambil judul tentang briket limbah kayu merbau sebagai penelitian. Tujuan dari penelitian ini adalah mengetahui kadar air,kadar abu, zat menguap, kadar karbon dan nilai kalor. Bahan dari bio briket yang digunakan pada penelitian ini ialah limbah kayu merbau. Komposisi antara limbah kayu merbau dan perekat adalah 90:10%. kemudian dibentuk menjadi briket dengan variasi penekanan yaitu: 350 kg, 400kg, 450 kg, dan 500 kg dengan waktu pengeringan 2-3 hari dibawah sinar matahari langsung. Kemudian dilakukan pengujian Analisis proksimasi. Hasil pengujian dengan nilai rata-rata yaitu: kadar air (3,94 %), kadar abu (1,98 %), kadar zat terbang (34,33 %), kadar karbon (59,70 %), nilai kalor (6567 kkal/kg). Pengaruh variasi penekanan dapat memberikan dampak yang signifikan dalam mendapatkan hasil.
今天,印度尼西亚人民使用的大部分能源来自化石燃料、煤和天然气。这些化石燃料的使用成本不仅对环境有害,而且不可再生和可持续,因此作者把merbau木材的标题作为研究。这项研究的目的是确定水、灰烬、挥发性物质、碳和氯气价值。这项研究使用的生物砖材料是木屑。木屑和胶粘剂的成分是90:10%然后形成一个突出变化的砖:350公斤,400公斤,450公斤,500公斤,有2-3天的阳光干燥时间。然后进行proksi马西分析测试。平均测试结果为:含水率(3.94 %)、含混率(1.98 %)、含混率(34.33 %)、碳含量(59.70 %)、热力值(6567千克/公斤)。重音变化的影响可以对结果产生重大影响。
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引用次数: 0
Pengaruh Suhu dan Waktu Reaksi Hidrogenasi Pembuatan Bahan Pelunak Kompon Karet dari Minyak Jarak 温氢反应对来自蓖麻油的橡胶复合材料生成的温氢反应的影响
Pub Date : 2020-12-20 DOI: 10.33536/JCPE.V5I2.630
L. Ifa, Ruslan Kalla, M. Rasyidin, Rezky Windisari Natsir
Bahan pelunak karet salah satu bahan kimia yang ditambahkan saat pembuatan kompon karet. Bahan pelunak pada pembuatan kompon karet saat ini banyak digunakan berasal dari minyak bumi. Minyak Jarak mengandung ikatan rangkap dapat digunakan sebagai bahan pelunak. Ikatan rangkap dirubah menjadi ikatan tunggal dengan proses hidrogenasi. Tujuan penelitian ini untuk mempelajari pengaruh suhu dan waktu reaksi hidrogenasi minyak jarak terhadap kualitas bahan pelunak serta untuk mengetahui pengaplikasian bahan pelunak terhadap kuat  tarik kompon karet.. Reaksi hidogenasi dipelajari pada suhu 40, 50, 60 dan 70 0 C dan waktu reaksi selama 1,  3 dan 5 jam. Minyak jarak dimasukan kedalam reaktor labu leher tiga 500 mL yang dilengkapi dengan pengaduk magnetis. Kedalam minyak jarak ditambahkan metanol 2 M, ditambahkan hidrogen peroksida 0,6 M dan katalis CuSO 4 . 5 H 2 O sebanyak 1 gr. Minyak jarak terhidrogenasi kemudian dipindahkan kedalam corong pisah untuk dimurnikan secara dekantasi.  Lapisan atas sebagai produk disaring dan dianalisa. Minyak jarak terhidrogenasi dikarakterisasi sifat kimianya meliputi bilangan iod dan derajat hidrogenasi. Penentuan gugus fungsi dengan spektroskopi FTIR dan kuat tarik. Hasil penelitian menunjukkan bahwa kondisi terbaik  pada suhu 40 o C dan waktu1 jam diperoleh bilangan iod 62,09% dan derajat hidrogenasi 30,62%. Aplikasi bahan pelunak terhadap kompon karet diperoleh kuat tarik 0.7404N/mm 2
橡胶柔软剂是橡胶合成过程中加入的化学物质之一。橡胶合成中使用的软化剂现在主要来自石油。带有粘结的蓖麻油可以用作柔软剂。一种合成键被转换成一种氢化过程的单键。本研究旨在研究油墨对软化剂特性的温度和时间反应的影响,并研究软化剂对强抗橡胶化合物粘力的应用。辐射反应是在40、50、60和70摄氏度和1、3和5小时内进行研究的。在一个3500毫升的葫芦反应堆中,装有磁搅拌器。在距离油中加入2米甲醇,加入过氧化氢0.6米(2英尺)和催化剂CuSO 4。5 H 2 O等于1克,水合物油被转移到分离漏斗中进行蒸馏。产品的顶部被过滤和分析。距离亲和力油的化学特性包括iod数和亲和力度。测定具有质谱仪和抗拉强度的功能簇。研究结果表明,在40摄氏度和1小时时间内,最佳温度获得了62.09%的iod和30.2%的氢化温和度。强拉0.7404n /mm 2获得橡胶复合材料应用
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引用次数: 0
期刊
Journal of Chemical Engineering & Process Technology
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