Study of Di- and Polyamines as Activators in the Hot Potash Process for CO2 Capture

2015 ◽  
Vol 68 (7) ◽  
pp. 1042
Author(s):  
Mamshad Ahmad ◽  
Asha Masohan ◽  
Shyam S. Sawhney
Keyword(s):  
Chemical Nature ◽  
Spatial Arrangement ◽  
Absorption Capacity ◽  
Dominant Factor ◽  
Pka Value ◽  
Molecule Number ◽  
Rate Of Absorption ◽  
Safe Limits ◽  
The Cost ◽  
Cyclic Nitrogen

An alarming rise in the atmospheric level of CO2 beyond safe limits has posed an immediate threat to mankind. It has become necessary to look for new economic processes for its capture and for options that can lead to reduction in the cost of existing processes. Hot potassium carbonate is one of the most viable processes. Efforts are continuously being made to improve on the capacity and rate of absorption of this solvent primarily by the use of activators. The latest activators in this category belong mostly to amines like piperazine and other cyclic nitrogen compounds. However, their study so far has been very haphazard. The first systematic study on alkanol monoamine activators was initiated and reported earlier by the authors. This paper extends the study and discusses the effect of some acyclic and cyclic diamines and polyamines as activators on absorption and regeneration of CO2 in K2CO3 solution. The effect of the cyclic or acyclic nature of the molecule, number of substituents, their chemical nature and their spatial arrangement was investigated. The parameters studied for this effect are rich and lean amine loading of CO2, CO2 regenerated and pKa of activators. Interestingly, it was observed that the bulkiness and spatial arrangement of substituents is the most dominant factor. An unsubstituted cyclic diamine (piperazine) performs best in enhancing the absorption capacity of solvent whereas diethylenetriamine is the best in enhancing rate of absorption. The study reveals no specific correlation of pKa value of the amines with their effect as activator.

scholarly journals Hubungan Kualitas Pelayanan Dimensi Servqual dengan Loyalitas Pasien di Poliklinik RSUD Arosuka Tahun 2018

2019 ◽  
Vol 19 (3) ◽  
pp. 694
Author(s):  
Titen Yasril ◽  
Dachriyanus Dachriyanus ◽  
Harmawati Harmawati
Keyword(s):  
Sampling Technique ◽  
Dominant Factor ◽  
Chi Square ◽  
Waiting Room ◽  
Cross Sectional ◽  
Old Patients ◽  
A Value ◽  
Patient Loyalty ◽  
Chi Square Test ◽  
The Cost

The lack of repeated visits of old patients will increase the cost of promotion to get new patients, one way to maintain old patients is to grow patient loyalty. Some patients in Arosuka General Hospital are still not loyal because they come to the hospital only for the first examination, then the patient goes to another hospital, some patients have not recommended the hospital to others, one of the factors that influence patient loyalty is the quality of service. This study aims to determine the relationship between service quality servqual dimensions and patient loyalty in Arosuka Hospital. The type of this study is cross sectional. The population in this study were all patients who came to the Arosuka Hospital polyclinic in 2018, a sample of 203 people with a proportional random sampling sampling technique conducted in April 2018 with the analysis used was the chi square test. The statistical test results obtained 60.1% of respondents not loyal, 61.6% of respondents stated that tangible was not good, 37.9% of respondents stated that reliability was not good, 51.2% of respondents stated that they were less responsive, 43.3% of respondents said assurace was not good, and 48.8% of respondents said empaty not good. There is a significant relationship between tangible, reliability, responsive, assurance, empathy and patient loyalty in Arosuka Hospital with a value of p <0.05 (p = 0.001, p = 0.015, p = 0.010, p = 0.002, p = 0.022). Tangible is the most dominant factor associated with patient loyalty. It is expected that the director will make a policy on service hours, sanctions for those who do not obey the service hours, coordinate with the local government in procuring transportation for patients, the head of the ward designing a comfortable waiting room, and providing suggestion boxes for patients.

scholarly journals FAKTOR KEPUASAN WISATAWAN PENGGUNA TRANSPORTASI LAUT DARI BALI KE GILI TRAWANGAN

Jurnal IPTA ◽  
2018 ◽  
Vol 6 (2) ◽  
pp. 124
Author(s):  
Syukriyan Abrar Syah ◽  
Ni Gusti Ayu Susrami Dewi ◽  
Putu Agus Wikanatha Sagita
Keyword(s):  
Quality Of Service ◽  
Dominant Factor ◽  
Sea Transport ◽  
Marine Transportation ◽  
Factors Affecting ◽  
Cost Factor ◽  
Level Of Satisfaction ◽  
The Cost ◽  
Selection Of

This research aims to analyze factors affecting the satisfaction of tourists in the use of marine transportation from Bali toward Gili Trawangan. The benefits of this research useful to the company in improving the services for tourists who will use the services of a crosswalk leading to Gili Trawangan.The respondents in this research totalled 190 respondents, the selection of the sample using the method of purposive sampling, the data in this study were analyzed using the analysis factors that help by statistikal program SPSS version 17.0 for windows. The results of this study are: 1) the satisfaction of tourists in the use of sea transport in general are at a level of satisfaction. 2) there are three factors that affect the satisfaction of tourists formed i.e. factors quality of maids, the cost factor & ease factors and product quality. Quality of service factor is the most dominant factor influencing the satisfaction of travellers with variable reliability as the dominant variables, and the variable availability schedule is a variable that must be improved.

Molecular deformation mechanisms and mechanical properties of polymers simulated by molecular dynamics

e-Polymers ◽  
2004 ◽  
Vol 4 (1) ◽  
Author(s):  
Ricardo Simões ◽  
António M. Cunha ◽  
Witold Brostow
Keyword(s):  
Molecular Dynamics ◽  
Mechanical Response ◽  
Polymeric Materials ◽  
Spatial Arrangement ◽  
Deformation Mechanisms ◽  
Second Phase ◽  
Two Phase ◽  
Chain Slippage ◽  
The Cost ◽  
Molecular Deformation

Abstract Virtual polymeric materials were created and used in computer simulations to study their behavior under uniaxial loads. Both single-phase materials of amorphous chains and two-phase polymer liquid crystals (PLCs) have been simulated using the molecular dynamics method. This analysis enables a better understanding of the molecular deformation mechanisms in these materials. It was confirmed that chain uncoiling and chain slippage occur concurrently in the materials studied following predominantly a mechanism dependent on the spatial arrangement of the chains (such as their orientation). The presence of entanglements between chains constrains the mechanical response of the material. The presence of a rigid second phase dispersed in the flexible amorphous matrix influences the mechanical behavior and properties. The role of this phase in reinforcement is dependent on its concentration and spatial distribution. However, this is achieved with the cost of increased material brittleness, as crack formation and propagation is favored. Results of our simulations are visualized in five animations.

scholarly journals Dominant Factors of Positive Impact of Ownership of Work Competency Certificate in Craftsman' Perception

Jurnal PenSil ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 19-27
Author(s):  
Huda Darussyafa ◽  
Irika Widiasanti ◽  
Anisah
Keyword(s):  
Work Ability ◽  
Quantitative Methods ◽  
Work Motivation ◽  
Positive Impact ◽  
Work Productivity ◽  
Construction Workers ◽  
Dominant Factor ◽  
Building Projects ◽  
The Cost ◽  
The City

This study aims to determine the dominant factor of the positive impact of ownership of work competency certificates in the perception of artisan on highrise building projects in the city of South Jakarta. Based on existing data the number of workers who already have work competency certificates is still very minimal. That is caused by several factors, namely the process of implementing certification which is considered complicated to the cost which is considered expensive. But behind these constraints, work competency certificates can have a positive impact on construction workers who have them. In this study conducted by quantitative methods by analyzing the percentage of respondents' perceptions. This research was carried out on the Cithaland Tower project, Alamanda Tower, Dharmawangsa Office Tower. The total number of respondents to be studied is 44 people. In this study the dominant factor studied was measured through four indicators namely work motivation, work productivity, work ability and competitiveness. With each percentage acquisition namely for Work Motivation 26.44%, Work Productivity 24.40%, Work Ability 24.66%, and Competitiveness 24.50%. Of the four indicators there is one indicator with the highest percentage and is the most dominant factor, namely the Work Motivation indicator with a percentage of 26.44%.

scholarly journals FAKTOR-FAKTOR YANG MEMPENGARUHI WISATAWAN CHINA MELAKUKAN FINTECH PAYMENT DI BALI

Jurnal IPTA ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 174
Author(s):  
Ni Luh Putri Utari Cahyani ◽  
I Made Kusuma Negara ◽  
I Ketut Suwena
Keyword(s):  
User Satisfaction ◽  
Sampling Technique ◽  
Test Reliability ◽  
Shopping Mall ◽  
Dominant Factor ◽  
Literature Study ◽  
Quick Response Code ◽  
Chinese Tourists ◽  
The Cost ◽  
Transaction Activities

WeChat Pay is a Chinese payment platform that makes it easy for users to make mobile phone payments using the Quick Response Code (QR) technology in cooperating merchants. The purpose is to know the characteristics and factors that influencing Chinese tourists doing payment transactions using WeChat Pay in Bali by taking case studies at Discovery Shopping Mall Kuta, and the sample is Chinese tourist who has made a payment transaction using WeChat Pay at Discovery Shopping Mall Kuta. Sampling technique using purposive sampling on 110 respondents. Data collection techniques were conducted in several ways, including: observation, questionnaires, interview, literature study, and documentation. Data analysis techniques done with several stages, including: validity test, reliability test, and factor analysis. The result is there are seven factors that influence the decision of the China's tourist to make a payment transaction using WeChat Pay at Discovery Shopping Mall, including: (1) ease of various transaction activities, (2) increase efficiency, (3) the cost of charge, (4) ease of using/operation, (5) ease of understanding and learning, (6) improve performance, and (7) user satisfaction. The results of factors analysis is ease of work becomes the most dominant factor. This factor consists of several variables, including: Ease of various transaction activities, improve accessibility, availability of payments, and transaction capabilities.

scholarly journals Students’ decision making in class selection and enrolment

2019 ◽  
Vol 33 (4) ◽  
pp. 587-603 ◽  
Author(s):  
Muhammad Hanif Othman ◽  
Noorihsan Mohamad ◽  
Mohd Nizam Barom
Keyword(s):  
Decision Making ◽  
Teaching And Learning ◽  
Learning Experience ◽  
Dominant Factor ◽  
Content Type ◽  
Space Factor ◽  
Time Space ◽  
Personal Attitudes ◽  
In The Beginning ◽  
The Cost

Purpose The purpose of this paper is to propose a theoretical model that integrates various dimensional factors which influence decision-making process of class selection and enrolment, analysing different angles of this process and explaining those factors which determine students’ decision. Design/methodology/approach This study uses quantitative design to determine and explore students’ decision making in class selection and enrolment. There were 396 students who participated in this study. The data were analysed using principle component analysis to determine the dominant factor for class selection and enrolment. Findings The study has analysed different factors that can influence students’ decision for class selection and enrolment. Five important underlying factors have been identified which includes the class and lecturer factor, time-space factor, ease and comfort factor, course mate factor and commitment factor. Moreover, the Kruskal–Wallis test shows that there is a significant mean difference in choice and selection behaviour between genders and students’ personal attitudes. Research limitations/implications This study is an early attempt to explore the wide fields of decision making in class selection and enrolment. It is hoped that follow-up studies would provide more coverage relative to the findings of this research. Practical implications One particular dimension of micro decision making faced by students is class (course) selection in the beginning of every academic semester/term. Class selection is very critical decision for students as it would reflect students expected outcome for their future career directions. More importantly, the decision made by the students may also affect their academic performance throughout their study. Social implications From the perspective of the university’s administrators, this issue is very critical for planning purposes. Understanding the students’ behaviour in class selection could improve the cost effectiveness as well as the scheduling of course offering to enhance students’ and instructors’ teaching and learning experience. Originality/value While many studies try to explore the questions of what makes a student choose a specific college/university or a specific field, limited number have investigated the behaviour of students in class selection and enrolment. This paper contributes to bridging that gap.

A Review of Distribution Network Planning with Large-Scale Intermittent Renewable Energy Access to Distribution Network

2014 ◽  
Vol 1008-1009 ◽  
pp. 723-728 ◽  
Author(s):  
Xu Dong Song ◽  
Nan Hua Yu ◽  
Jun Jun Liang ◽  
Cheng Jun Xia
Keyword(s):  
Renewable Energy ◽  
Large Scale ◽  
Rapid Development ◽  
Distribution Network ◽  
Research Direction ◽  
Absorption Capacity ◽  
Energy Access ◽  
Multiple Sources ◽  
Unique Source ◽  
The Cost

With the rapid development of DG, especially the access of large-scale renewable energy, traditional simple distribution network with unique source turns into ADN with multiple sources, making the distribution network more complicated. In this paper, The power source and grid planning of traditional and intelligent distribution network are discussed, based on which the problems ADN faces and the research difficulty are focused on. The key technology of ADN planning is analyzed, including the uncertainty of load forecasting, the ADN absorption capacity for DG and the cost-effectiveness of ADN planning. Some suggestions for the research direction of ADN in the future are made at the end, providing reference for the ADN planning with large-scale renewable energy access.

scholarly journals Analisis Profitabilitas Usaha Peternakan Ayam Kampung Super di Kabupaten Jember

2017 ◽  
Vol 1 (1) ◽  
pp. 31-38
Author(s):  
Muhammad Ardi Wiranata ◽  
Joko Irsan Sanyoto ◽  
Hariadi Subagja
Keyword(s):  
Regression Analysis ◽  
Research Method ◽  
Cost Management ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Dominant Factor ◽  
Selling Price ◽  
Feed Cost ◽  
The Cost ◽  
Data Result

This study aimed to determine the cost of management, day old chick cost, production, selling price to profit level, R / C ratio and Return on Investmen (ROI) ayam kampung super in Jember. The research method used was survey with 18 respondents in Jember. The data result were analyzed using multiple linear regression analysis and the following equations were Y = -1.90 – 0.35X1 – 1.22X2 + 0.23X3 + 2.26X4 + 0.11X5. This equation means every level of profit level by X1 (management cost) equal to -0.35, X2 (feed cost) equal to -1.22, X3 (seed cost) equal to 0.23, X4 (chicken production) equal to 2.26, X5 (chicken selling price) of 0.11. R / C ratio was 1.18, and ROI was 16%. The result of research showed that the most dominant factor influences to the profit level were  feed cost, management cost and production. Profitability of this research 98% have been considered while factors outside this study 2%.

Optimization by Simulation of Fabrication in Manufacturing Robotized Systems

2012 ◽  
Vol 463-464 ◽  
pp. 1133-1136 ◽  
Author(s):  
Constantin Dumitru ◽  
Violeta Dumitru ◽  
Daniel Popescu
Keyword(s):  
Production Systems ◽  
Industrial Robot ◽  
Product Family ◽  
Spatial Arrangement ◽  
Flexible Production ◽  
Mathematic Modeling ◽  
Flexible Production Systems ◽  
Cell Modules ◽  
The Cost ◽  
Flexible Fabrication

This work proposes the optimization by simulation of fabrication in manufacturing robotized systems, designing in principle of a flexible fabrication cell composed of many modules (centering, turning, etc) for machining of a product family, cell that is to be operated by an industrial robot whose purpose is the handling of parts within it (transport of parts among the cell modules). The production task shall be reviewed first, within which the typological nucleus to be machined, using the mathematic theory of utilities. The next step consists in determining the static configuration of the MRS in order to set the type and number of modules-operation using the mathematic modeling. Through the method of fictive ranges it shall be calculated the cost of the flexible production systems and it shall be determined the spatial arrangement of processing modules from MRS.

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