Process Intensification Consultants

Hyderabad, India

Process Intensification Consultants

Hyderabad, India

Time filter

Source Type

Spoorthi G.,Indian Institute of Technology Kanpur | Thakur R.S.,Indian Institute of Technology Kanpur | Kaistha N.,Indian Institute of Technology Kanpur | Rao D.P.,Process Intensification Consultants
Adsorption | Year: 2011

Process intensification aims at reducing the size of equipment by orders of magnitude and is actively perused in separation processes. Its feasibility in Pressure Swing Adsorption (PSA) processes has been explored. A 4-bed PSA and a 3-bed PSA, which emulate the moving bed processes, and duplex PSA and a modified duplex PSA have been selected for the exploratory studies. Simulation studies on the separation of a mixture of CH 4-CO 2 over 5A zeolite were carried out to compare the performance of these processes. An index has been proposed to quantify the process intensification. The 3-bed PSA and the modified duplex PSA exhibited superior performance compared to the other two for a purity of 99.9 mol% of both the products. However, the performances of the processes other than duplex were comparable when purities were set at 95 mol%. In 3-bed PSA a modest process intensification of four times reduction in size and two times reduction in energy requirement appears to be feasible if benchmarked against the PSA based on the variant of the Skarstrom cycle. © 2010 Springer Science+Business Media, LLC.


Rajan S.,Indian Institute of Technology Kanpur | Kumar M.,Indian Institute of Technology Kanpur | Ansari M.J.,Indian Institute of Technology Kanpur | Rao D.P.,Process Intensification Consultants | Kaistha N.,Indian Institute of Technology Kanpur
Industrial and Engineering Chemistry Research | Year: 2011

The flooding and mass transfer characteristics of a rotating packed bed (RPB) incorporating the split packing design innovation is studied. The air-water system is used for characterizing the flooding behavior, while mass transfer is studied for the chemisorption of CO2 in aqueous NaOH. Danckwert's chemical method is used to infer the effective specific interfacial area (ae) for mass transfer. The variation in the liquid side volumetric mass transfer coefficient (kLae) with operating conditions is also measured. Consistently higher values of ae and kLae are observed for counter-rotation of the adjacent packing rings compared to co-rotation. The flooding and mass transfer results are compared with existing literature data on packed columns and conventional HiGee to evaluate the process intensification potential of the novel HiGee. The flooding limits are comparable to conventional HiGee, while the reported a e and kLae values are higher. © 2010 American Chemical Society.


Shivhare M.K.,Indian Institute of Technology Kanpur | Rao D.P.,Process Intensification Consultants | Kaistha N.,Indian Institute of Technology Kanpur
Chemical Engineering and Processing: Process Intensification | Year: 2013

In this work, SO2 absorption in aqueous NaOH (gas side mass transfer resistance controlled system) and O2 desorption from the water (liquid side mass transfer resistance controlled system) are experimentally evaluated for enhancement in the controlling side volumetric mass transfer coefficient using the novel split-packing and conventional single-block rotating packed bed (RPB) designs. In the split-packing RPB design, mass transfer characteristics for co-rotation and counter-rotation of adjacent rings are studied. For the SO2 absorption system, results show a significant reduction in the controlling mass transfer resistance for split-packing over single-block packing for large RPBs. However, the mass transfer coefficients for co- and counter-rotation are comparable. For the O2 desorption system, at low rotation rates, the split-packing design gives higher mass transfer rates compared to the single-block packing. This difference disappears as the rotation rate is increased. Possible reasons for the experimental observations are speculated. The results suggest the split packing design to be more suitable for gas side mass transfer resistance controlled systems. © 2013 Elsevier B.V.


Thakur R.S.,Indian Institute of Technology Kanpur | Kaistha N.,Indian Institute of Technology Kanpur | Rao D.P.,Process Intensification Consultants
Computers and Chemical Engineering | Year: 2011

As an alternative to the Pressure Swing Adsorption (PSA) based on the Skarstrom cycle or its variants, a novel two-bed PSA - called duplex PSA - has been proposed by Hirose and independently by Leavitt to get both products of high purities. A modified duplex PSA has been presented to achieve process intensification, that is, to enhance the product purities and productivities. Simulation studies were carried out to explore the attainable product purities and possible process intensification for CO 2 capture with the original and modified duplex PSA. The volume reduction of beds that can be realized with modified duplex PSA is about 100-50 times the original duplex PSA depending upon the product purities. © 2011 Elsevier Ltd.


Rao D.P.,Process Intensification Consultants
Indian Chemical Engineer | Year: 2015

A paradigm shift in chemical engineering is hard to come by. Here is a case study of how difficult it is to dethrone its iconic symbol, the distillation column, from dominating the skyline of chemical industries. Presented here are some intriguing aspects of HIGEE, its application and a crystal gazing on its future. © 2015 Indian Institute of Chemical Engineers

Loading Process Intensification Consultants collaborators
Loading Process Intensification Consultants collaborators