Stefanus Muryanto
•A chemical engineer (Prof.Ir, MEngSc, PhD) with over 26 years of experience in teaching, administration and outreach activities.
•Approachable to students, generous with time and efforts.
•Specialties: chemical engineering education and research.
•Teaching areas: crystallization, engineering concepts, engineering ethics, Green Chemistry and Engineering, process equipment design, pulp and paper technology, research methods, unit operations.
•Research interests: adsorption, crystallization, material science (FTIR, SEM, EDS, XRD), nutrient recovery from wastewater, substance flow analysis (SFA).
•Outreach activities: promoting awareness of the safety use of household chemicals for villages and remote areas; helping with high school student projects.
•Senior scholar (dosen luar biasa): Mechanical Engineering Graduate Program, DIPONEGORO University, Semarang, Indonesia.
Supervisors: Professor Ha Ming Ang
•Approachable to students, generous with time and efforts.
•Specialties: chemical engineering education and research.
•Teaching areas: crystallization, engineering concepts, engineering ethics, Green Chemistry and Engineering, process equipment design, pulp and paper technology, research methods, unit operations.
•Research interests: adsorption, crystallization, material science (FTIR, SEM, EDS, XRD), nutrient recovery from wastewater, substance flow analysis (SFA).
•Outreach activities: promoting awareness of the safety use of household chemicals for villages and remote areas; helping with high school student projects.
•Senior scholar (dosen luar biasa): Mechanical Engineering Graduate Program, DIPONEGORO University, Semarang, Indonesia.
Supervisors: Professor Ha Ming Ang
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Books by Stefanus Muryanto
Gypsum is widely known as one of the major components of scale in many industrial processes and domestic applications. The scale formation of gypsum is a persistent problem encountered by several hydrometallurgical processes in Australia. It is a complicated phenomenon which causes a series of operational problems such as a reduction in production capacity, an increase in energy requirement, and an increase in downtime for maintenance and replacement of parts. Ultimately, these technical difficulties lead to substantial economic consequences.
Early researchers on gypsum scaling mainly focused on the kinetics of scale formation, while later studies put the emphasis on the effects of external factors such as hydrodynamics. To date, very little work has been done to investigate gypsum scale pertinent to hydrometallurgical processes such as those found in Australia, namely gypsum scaling on pipes, vessel walls and cooling systems.
This paper presents a thorough and systematic investigation on the effects of various process parameters and the efficacy of both inorganic and organic additives in controlling the formation of gypsum scale in pipe flow systems. These process parameters included flow rate, temperature, supersaturation and surface materials. The effects of three inorganic and twelve organic additives, mainly the derivatives of carboxylic and phosphonic acids, on the scale formation were also investigated.
Papers by Stefanus Muryanto
Gypsum is widely known as one of the major components of scale in many industrial processes and domestic applications. The scale formation of gypsum is a persistent problem encountered by several hydrometallurgical processes in Australia. It is a complicated phenomenon which causes a series of operational problems such as a reduction in production capacity, an increase in energy requirement, and an increase in downtime for maintenance and replacement of parts. Ultimately, these technical difficulties lead to substantial economic consequences.
Early researchers on gypsum scaling mainly focused on the kinetics of scale formation, while later studies put the emphasis on the effects of external factors such as hydrodynamics. To date, very little work has been done to investigate gypsum scale pertinent to hydrometallurgical processes such as those found in Australia, namely gypsum scaling on pipes, vessel walls and cooling systems.
This paper presents a thorough and systematic investigation on the effects of various process parameters and the efficacy of both inorganic and organic additives in controlling the formation of gypsum scale in pipe flow systems. These process parameters included flow rate, temperature, supersaturation and surface materials. The effects of three inorganic and twelve organic additives, mainly the derivatives of carboxylic and phosphonic acids, on the scale formation were also investigated.
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1.Asia Pacific Journal of Chemical Engineering - Wiley
2.Desalination - Elsevier
3.Desalination and Water Treatment - Taylor & Francis
4.Education for Chemical Engineers - Elsevier
5.Int.J.Chemical Engineering and Applications - IACSIT
6.Materials Research Innovations - Maney
7.Polymer for Advanced Technologies - Wiley