Denny Gunawan

8 Questions 20 Answers 0 Followers

Questions related from Denny Gunawan

How can I enhance thermal and chemical stability of MOF based catalyst?

I need high performance bifunctional metal-acid catalyst to promote conversion of lignin to cycloalkanes. I will use MOF based catalyst as the acid catalyst. However, the acidity type that is...

12 April 2017 3,914 3 View

Can I modify natural zeolite to have properties like HZSM-5?

I want to convert phenol into cyclohexane via hydrodeoxygenation process. Most literatures suggest to use bifunctional HZSM-5 (acid catalyst) supported Pd catalyst (metal catalyst). However, I...

12 April 2017 4,812 3 View

How is the best feeding strategy for continuous Fenton oxidation wastewater treatment?

I'm currently doing research about Fenton oxidation in CSTR. So, I should feed the wastewater, Fe(II) catalyst, and hydrogen peroxide to 1-L reactor continuously.How is the best feeding strategy...

28 October 2016 6,851 8 View

How to make nano silica from extracted silica rice husk?

I've extract pure silica from rice husk by acid leaching. I want to get silica nano particle by base extraction with sodium hydroxide and acid precipitation. I've dissolve extracted silica rice...

14 September 2016 3,323 5 View

What are the advantages of combining electrolysis and heterogenous catalysis process in biodiesel production?

I'm searching for new and interesting topic of biodiesel production method. I've found new production method using electrolysis and heterogenous catalysis. What are the advantages of combining...

28 August 2016 8,054 1 View

How to calculate thermal efficiency in cement kiln system?

I have to audit thermal efficiency of cement kiln system. I've made mass and heat balance for that system. Heat inputs consist of raw mix heat, air heat, coal heat, and coal combustion heat. Heat...

05 August 2016 7,107 4 View

Is it possible to make simulation of citric acid plant from sorghum by submerged fermentation process with Aspen HYSYS?

I want to design citric acid plant by submerged fermentation process with Aspen HYSYS. But the problems are Aspen HYSYS doesn't provide sorghum properties, many unit operations for submerged...

28 June 2016 5,961 9 View

How to fitting curve by MATLAB when the model can't be linearized?

I have a model Y = A(1-EXP(-AX)) and I want to get the value of A so the Y vs X model and Y vs X experiment has a minimum deviation (R-squared value = 1). I think I can fitting that curve by using...

26 June 2016 6,969 5 View