scholarly journals Towards Biomass Gasification Enhanced by Structured Iron-Based Catalysts

Fuels ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 546-555
Author(s):  
Giovanna Ruoppolo ◽  
Gianluca Landi
Keyword(s):  
Biomass Gasification ◽  
Limited Range ◽  
Gas Production ◽  
Operating Conditions ◽  
Coke Deposition ◽  
Catalytic Systems ◽  
Catalytic Filter ◽  
Iron Based ◽  
Fluidized Bed Gasifier ◽  
Gas Conditioning

The main drawback for the development of biomass gasification technology is tar conversion. Among the various methods for tar abatement, the use of catalysts has been proposed in the literature. Most of the works reported in the literature on catalytic systems for biomass tar conversion refers to catalysts in the form of powder; however, deactivation occurs by fast clogging with particulates deriving from biomass gasification. The integration of catalytic filter element for particle and tar removal directly integrated into the freeboard of the reactor is a new concept recently proposed and patented. In this context, this paper evaluates the possibility to integrate a structured iron-based catalytic monolith in the freeboard of a fluidized bed gasifier to enhance biomass gasification. The effectiveness of using a monolith for gas conditioning has been preliminarily verified. The limited effect on the gas production and composition seems to be related to the limited range of operating conditions explored in this work rather than to the low activity of the iron-based catalyst. Further studies to optimize the performance and to assess the possible deactivation of the catalyst due to coke deposition must be carried out.

Should Biomass be Used for Power Generation or Hydrogen Production?

2006 ◽  
Vol 129 (3) ◽  
pp. 629-636 ◽  
Author(s):  
Alessandro Corradetti ◽  
Umberto Desideri
Keyword(s):  
Power Generation ◽  
Hydrogen Production ◽  
Electrical Energy ◽  
Biomass Gasification ◽  
Gas Production ◽  
Combined Cycle ◽  
Operating Conditions ◽  
Thermodynamic Efficiency ◽  
Gas Generation ◽  
Steam Methane

In the last several years, gasification has become an interesting option for biomass utilization because the produced gas can be used as a gaseous fuel in different applications or burned in a gas turbine for power generation with a high thermodynamic efficiency. In this paper, a technoeconomic analysis was carried out in order to evaluate performance and cost of biomass gasification systems integrated with two different types of plant, respectively, for hydrogen production and for power generation. An indirectly heated fluidized bed gasifier has been chosen for gas generation in both cases, and experimental data have been used to simulate the behavior of the gasifier. The hydrogen plant is characterized by the installation of a steam methane reformer and a shift reactor after the gas production and cleanup section; hydrogen is then purified in a pressure swing adsorption system. All these components have been modeled following typical operating conditions found in hydrogen plants. Simulations have been performed to optimize thermal interactions between the biomass gasification section and the gas processing. The power plant consists of a gas-steam combined cycle, with a three-pressure-levels bottoming cycle. A sensitivity analysis allowed to evaluate the economic convenience of the two plants as a function of the costs of the hydrogen and electrical energy.

Gas cleaning, gas conditioning and tar abatement by means of a catalytic filter candle in a biomass fluidized-bed gasifier

2010 ◽  
Vol 101 (18) ◽  
pp. 7123-7130 ◽  
Author(s):  
Sergio Rapagnà ◽  
Katia Gallucci ◽  
Manuela Di Marcello ◽  
Muriel Matt ◽  
Manfred Nacken ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Gas Cleaning ◽  
Catalytic Filter ◽  
Fluidized Bed Gasifier ◽  
Gas Conditioning

Biomass Gasification Hot Gas Filter Testing Results

1996 ◽  
Author(s):  
Benjamin C. Wiant ◽  
Dennis M. Bachovchin ◽  
Michael Onischak ◽  
Ronald H. Carty ◽  
Matthew Ratcliff
Keyword(s):  
Process Development ◽  
Biomass Gasification ◽  
Operating Conditions ◽  
Gas Filtration ◽  
Hot Gas ◽  
The Us ◽  
Development Unit ◽  
Westinghouse Electric Corporation ◽  
Fluidized Bed Gasifier ◽  
Westinghouse Electric

Westinghouse Electric Corporation, under contract to the US Department of Energy’s National Renewable Energy Laboratory, has been conducting hot gas cleanup system testing compatible with a pressurized fluidized bed gasifier and the operation of a gas turbine. The testing is in support of the US Department of Energy’s Binmass Power Program, and specifically, the Biomass Gasification Facility Demonstration in Paia, Hawaii. The hot gas cleanup testing was conducted at the Institute of Gas Technology’s research facilities in Chicago, Illinois, using the RENUGAS® 9.1 metric ton (10 ton) per day process development unit. The initial testing began in September 1994 and concluded February 1995. Based on the results of this testing, the hot gas cleanup system’s operation is being optimized for longer duration testing to be conducted at the Biomass Gasification Facility in Hawaii. Initial test results show that hot gas filtration of bagasse flyash/char, as well as tar and oils reduction, at gasifier operating conditions can be successfully accomplished. The results of these initial tests are summarized in this paper.

Should Biomass Be Used for Power Generation or Hydrogen Production?

2005 ◽  
Author(s):  
Alessandro Corradetti ◽  
Umberto Desideri
Keyword(s):  
Power Generation ◽  
Hydrogen Production ◽  
Electrical Energy ◽  
Biomass Gasification ◽  
Gas Production ◽  
Combined Cycle ◽  
Operating Conditions ◽  
Thermodynamic Efficiency ◽  
Gas Generation ◽  
Steam Methane

In the last years gasification has become an interesting option for biomass utilization, since the produced gas can be used as a gaseous fuel in different applications or burnt in a gas turbine for power generation with a high thermodynamic efficiency. In this paper a techno-economic analysis was carried out in order to evaluate performance and cost of biomass gasification systems integrated with two different types of plant, respectively for hydrogen production and for power generation. An indirectly heated fluidized bed gasifier has been chosen for gas generation in both cases and experimental data have been used to simulate the behavior of the gasifier. The hydrogen plant is characterized by the installation of a steam methane reformer and a shift reactor after the gas production and clean-up section; hydrogen is then purified in a pressure swing adsorption system. All these components have been modeled following typical operating conditions found in hydrogen plants. Simulations have been performed to optimize thermal interactions between the biomass gasification section and the gas processing. The power plant consists of a gas-steam combined cycle, with a three pressure levels bottoming cycle. A sensitivity analysis allowed to evaluate the economic convenience of the two plants as a function of the costs of the hydrogen and electrical energy.

Role of Reynolds and Archimedes numbers in particle-fluid flows

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Haim Kalman
Keyword(s):  
Flow Regime ◽  
Power Function ◽  
Fluid Flows ◽  
Limited Range ◽  
Operating Conditions ◽  
Pneumatic Conveying ◽  
Particulate Materials ◽  
Simple Power ◽  
Simple Power Function

AbstractAny scientific behavior is best represented by nondimensional numbers. However, in many cases, for pneumatic conveying systems, dimensional equations are developed and used. In some cases, many of the nondimensional equations include Reynolds (Re) and Froude (Fr) numbers; they are usually defined for a limited range of materials and operating conditions. This study demonstrates that most of the relevant flow types, whether in horizontal or vertical pipes, can be better described by Re and Archimedes (Ar) numbers. Ar can also be used in hydraulic conveying systems. This paper presents many threshold velocities that are accurately defined by Re as a simple power function of Ar. Many particulate materials are considered by Ar, thereby linking them to a common behavior. Using various threshold velocities, a flow regime chart for horizontal conveying is presented in this paper.

scholarly journals CO2 Capture from Biomass Gasification Producer Gas Using a Novel Calcium and Iron-Based Sorbent through Carbonation–Calcination Looping

2020 ◽  
Vol 59 (41) ◽  
pp. 18447-18459
Author(s):  
Forogh Dashtestani ◽  
Mohammad Nusheh ◽  
Vilailuck Siriwongrungson ◽  
Janjira Hongrapipat ◽  
Vlatko Materic ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Biomass Gasification ◽  
Producer Gas ◽  
Iron Based

An ESP Production Optimization Algorithm Applied to Unconventional Wells

2021 ◽  
Author(s):  
Fernando Bermudez ◽  
Noor Al Nahhas ◽  
Hafsa Yazdani ◽  
Michael LeTan ◽  
Mohammed Shono
Keyword(s):  
Gas Production ◽  
Oil Wells ◽  
Production Optimization ◽  
Operating Conditions ◽  
Tight Oil ◽  
Daily Production ◽  
Free Gas ◽  
Maximum Production ◽  
Electrical Submersible Pumps ◽  
High Production

Abstract The objectives and Scope is to evaluate the feasibility of a Production Maximization algorithm for ESPs on unconventional wells using projected operating conditions instead of current ones, which authors expect will be crucial in adjusting the well deliverability to optimum frequencies on the rapidly changing conditions of tight oil wells. Actual production data for an unconventional well was used, covering from the start of Natural Flow production up to 120 days afterwards. Simulating what the production would be if a VFD running on IMP Optimization algorithms had been installed, new values for well flowing pressures were calculated, daily production scenarios were evaluated, and recommended operating frequencies were plotted. Result, observations, and conclusions: A. Using the Intelligent Maximum Production (IMP) algorithm allows maximum production from tight oil wells during the initial high production stage, and the prevention of gas-locking at later stages when gas production increases. B. The adjustment of frequency at later stages for GOR wells is key to maintaining maximum production while controlling free gas at the intake when compared against controlling the surface choke. Novel/additive information: The use of Electrical Submersible Pumps for the production of unconventional wells paired with the use of a VFD and properly designed control algorithms allows faster recovery of investment by pumping maximum allowable daily rates while constraining detrimental conditions such as free gas at the intake.

scholarly journals IMPROVE THE PYROLYTIC GAS PRODUCTION BY USING THE CO-PYROLYSIS TECHNIQUE : AN EXPERIMENTAL STUDY

2021 ◽  
Vol 21 (2) ◽  
Author(s):  
Abo . Zahra A.I ◽  
M.K. Abd El- Wahab ◽  
M.A. Tawfik
Keyword(s):  
Energy Conversion ◽  
Fluidized Bed ◽  
Conversion Efficiency ◽  
Fixed Bed ◽  
Energy Conversion Efficiency ◽  
Gas Production ◽  
Operating Conditions ◽  
Energy Unit ◽  
Heating Value ◽  
Slow Pyrolysis

The target of the biomass co-pyrolysis is improvingthe heating value of the produced bio-products of a certain type of feedstock, besides disposal of more than one residue in the same time. Thus, this work aims to operate a local fabricated fixed-bed pyrolyzer to improve the pyrolytic gas yield produced by the ground pieces of three biomass residues namely Mango trees Pruning Logs (MPL), Sugarcane bagasse (SB) and Rice straw (RS) using an affordable slow pyrolysis technique. This work was carried out under slow pyrolysis conditions represented in final pyrolysis temperature of 400 °C, vapor residence time of 4 min, heating rate of 0.01-1 °C/s in full absence of oxygen. The pyrolytic gas production was assessed under different feedstock mixing ratios of (1:2:1), (1:1:2) and (2:1:1) as ratio of (RS: SB: MPL), particle lengths of 1-5, 10-15 and 20-25 mm, with and without sandy bed at the bottom of pyrolysis chamber as a fluidized bed. The obtained results showed that, using the fluidized fixed-bed pyrolyzer under slow co-pyrolysis conditions gave the optimum results where in, the pyrolytic gas concentration, gas yield, higher heating value of pyrolytic gasand energy conversion efficiency were 55%, 1.09 Nm3 /kg, 14.97 MJ/Nm3 and 85.43%, respectively, and 53.7%, 1.08 Nm3 /kg, 13.75 MJ/Nm3 ,77.71% in case of using the pyrolyzer without fluidized bed under the same operating conditions. So, the pyrolyzer with fluidized bed achieves an increment in the higher heating value and energy conversion efficiency by about 8.15% and 9.03%, respectivly over the pyrolyzer without fluidized bed.Furthermore, the cost per energy unit of pyrolytic gas produced by the fluidized bed pyrolyzer is lower than the common two fossil gaseous fuels of natural gas and LPG costs by about 28.57% and 80%, respectively.

Sign in / Sign up

Export Citation Format

Share Document