M. Raphael

University of Dar es Salaam

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Sohrab Rohani

Western University

Snehal A. Patel

Ganpat University

James G. Daly

Texas A&M University

Dragomir B. Bukur

Texas A&M University at Qatar

G.B. Tatterson

United States Department of Commerce

F. Sosulski

University of Saskatchewan

A. E. G. Kr. von dem Borne

Dutch Blood Transfusion Society

Emanuele Angelucci

Ospedale Policlinico San Martino

Herbert Levine

Northeastern University

Richard F. Ambinder

Johns Hopkins University

Cooperative Institutions

Istituti di Ricovero e Cura a Carattere Scientifico

The University of Texas MD Anderson Cancer Center

Johns Hopkins University

University of Milan

University of Turin

Gruppo Italiano per il Trapianto di Midollo Osseo

Sapienza University of Rome

University of Florence

Johns Hopkins Medicine

University of Bologna

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Hydrodynamics of Fischer-Tropsch Synthesis in Slurry Bubble Column Reactors

G.B. Tatterson Dragomir B. Bukur Snehal A. Patel M. Raphael James G. Daly

Fischer–Tropsch process

Bubble column reactor

Source

Cite

Citations (2)

Sunflower protein precipitation in a tubular precipitator

The Canadian Journal of Chemical Engineering (1999)

M. Raphael Sohrab Rohani

Abstract Isoelectric precipitation of sunflower protein was carried out in a 20 m long, 6 mm internal diameter glass tubular precipitator. Effects of feed flow rate, protein concentration in the feed stream, and mean residence time on particle size distribution (PSD) were studied. The population balance equation (PBE) for the tubular precipitator was solved using the orthogonal collocation multiple shooting method. A simulated annealing method was used to determine the precipitation kinetic parameters for the nucleation rate, growth rate, aggregation rate, and breakage rate from the experimental data. Due to the lack of experimental data on the kinetics of sunflower protein precipitation in the literature, the extracted kinetics from our experiments were used to evaluate the predictive capability of the present model for experiments whose results had not been used to derive the kinetics. The model predictions of the particle size distribution along the tubular precipitator showed better agreement with the experimental data for large particles in comparison to the small particles (< 10 μm).

10.1002/cjce.5450770315

Cite

Citations (17)

Recovery and kinetics study of isoelectric precipitation of sunflower protein in a tubular precipitator

M. Raphael

Source

Cite

Citations (4)

Isoelectric precipitation of sunflower protein in an MSMPR precipitator: Modelling of PSD with aggregation

Chemical Engineering Science (1996)

M. Raphael Sohrab Rohani

Breakage

Particle (ecology)

10.1016/0009-2509(96)00297-7

Cite

Citations (9)

On-line estimation of solids concentrations and mean particle size using a turbidimetry method

Powder Technology (1996)

M. Raphael Sohrab Rohani

Turbidimetry

Turbidity

Suspension

Particle (ecology)

10.1016/s0032-5910(96)03177-4

Cite

Citations (36)

Isoelectric precipitation of sunflower protein in a tubular precipitator

The Canadian Journal of Chemical Engineering (1995)

M. Raphael Sohrab Rohani F. Sosulski

Abstract Isoelectric precipitation of sunflower protein was carried out in a 10‐m long, 6‐mm internal diameter glass tubular precipitator. The effects of feed flow rate, protein concentration in the feed stream, and volumetric feed ratio of precipitant (HCl aqueous solution) to protein solution on solid protein recovery and particle size distribution were studied. The dispersion range of the tubular precipitator was modelled to predict the experimental results. Calculated initial growth rates of protein particles were found to: increase with increases in feed flow rate and protein concentration in the feed stream, and decrease with increases in volumetric feed ratio.

Particle (ecology)

10.1002/cjce.5450730407

Cite

Citations (22)

Title Page / Table of Contents

Acta Haematologica (1987)

Elio Gentilini Cacciola Anna Butturini Emma Sthivelman Eli Canaani Robert Peter Gale

Table (database)

10.1159/000205896

Cite

Citations (0)

EOS Model and Black-Oil PVT Table Generation for a Tanzanian Reservoir

Deleted Journal (2019)

Oras Joseph Mkinga Jon Kleppe Richard Rwechungura M. Raphael

Tuning of an EOS model and generation of Black-oil PVT tables for a gas field in Tanzania, here named R reservoir, are presented.The Soave-Redlich-Kwong equation of state was tuned using experimental data and PhazeComp software to obtain the EOS model which represents fluid behavior change in the R reservoir.A contribution is provided in a relationship between specific gravity and molecular weight, which is a modified form of Soreide equation for C7+ characterization.Constants of the equation are determined using linear regression to fit experimental data.A residual oil in the reservoir is recognized using EOS calculation; PVT data generated in this paper can be used to study its potential to condensate blockage and well deliverability.Gas and oil PVT tables are generated for saturated and undersaturated condition, they can be used in reservoir simulation of R reservoir.

Table (database)

10.30845/ijast.v9n2p8

Cite

Citations (2)

Hydrodynamics of bubble columns with application to Fischer-Tropsch synthesis

M. Raphael

Fischer–Tropsch process

Source

Cite

Citations (0)

Hydrodynamics of Fischer-Tropsch synthesis in slurry bubble column reactors: Final report

Dragomir B. Bukur James G. Daly Snehal A. Patel M. Raphael G.B. Tatterson

This report describes studies on hydrodynamics of bubble columns for Fischer-Tropsch synthesis. These studies were carried out in columns of 0.051 m and 0.229 m in diameter and 3 m tall to determine effects of operating conditions (temperature and gas flow rate), distributor type (sintered metal plate and single and multi-hole perforated plates) and liquid media (paraffin and reactor waxes) on gas hold-up and bubble size distribution. In experiments with the Fischer-Tropsch (F-T) derived paraffin wax (FT-300) for temperatures between 230 and 280/sup 0/C there is a range of gas velocities (transition region) where two values of gas hold-up (i.e., two flow regimes) are possible. Higher hold-ups were accompanied by the presence of foam (''foamy'' regime) whereas lower values were obtained in the absence of foam (''slug flow'' in the 0.051 m column, or ''churn-turbulent'' flow regime in the 0.229 m column). This type of behavior has been observed for the first time in a system with molten paraffin wax as the liquid medium. Several factors which have significant effect on foaming characteristics of this system were identified. Reactor waxes have much smaller tendency to foam and produce lower hold-ups due to the presence of larger bubbles. Finally, new correlations for prediction of the gas hold-up and the specific gas-liquid interfacial area were developed on the basis of results obtained in the present study. 49 refs., 99 figs., 19 tabs.

Fischer–Tropsch process

Distributor

Paraffin wax

Bubble column reactor

10.2172/5823505

Cite

Citations (4)