Parametric Study of the Two-Stage Pyrolysis Process for Activated Carbon Preparation from Pithecellobium Jiringa

2019 ◽  
pp. 241-251
Author(s):  
Muhamad Husaini Abu Bakar ◽  
Mohamad-Syafiq Mohd-Kamal ◽  
Mohd-Nazri Che-Adnan
Keyword(s):  
Activated Carbon ◽  
Parametric Study ◽  
Pyrolysis Process ◽  
Two Stage

Evaluation of activated carbon synthesized by one-stage and two-stage co-pyrolysis from sludge and coconut shell

2019 ◽  
Vol 170 ◽  
pp. 722-731 ◽  
Author(s):  
Bing Yang ◽  
Yucheng Liu ◽  
Qingling Liang ◽  
Mingyan Chen ◽  
Lili Ma ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Coconut Shell ◽  
Two Stage ◽  
One Stage

Optimisation of CO Turndown for an Axially Staged Gas Turbine Combustor

2020 ◽  
Author(s):  
Jacob E. Rivera ◽  
Robert L. Gordon ◽  
Mohsen Talei ◽  
Gilles Bourque
Keyword(s):  
Residence Time ◽  
Parametric Study ◽  
Gas Turbines ◽  
Flow Reactor ◽  
Operating Conditions ◽  
Independent Effect ◽  
Inlet Temperature ◽  
Operating Characteristics ◽  
Two Stage ◽  
The Impact

Abstract This paper reports on an optimisation study of the CO turndown behaviour of an axially staged combustor, in the context of industrial gas turbines (GT). The aim of this work is to assess the optimally achievable CO turndown behaviour limit given system and operating characteristics, without considering flow-induced behaviours such as mixing quality and flame spatial characteristics. To that end, chemical reactor network modelling is used to investigate the impact of various system and operating conditions on the exhaust CO emissions of each combustion stage, as well as at the combustor exit. Different combustor residence time combinations are explored to determine their contribution to the exhaust CO emissions. The two-stage combustor modelled in this study consists of a primary (Py) and a secondary (Sy) combustion stage, followed by a discharge nozzle (DN), which distributes the exhaust to the turbines. The Py is modelled using a freely propagating flame (FPF), with the exhaust gas extracted downstream of the flame front at a specific location corresponding to a specified residence time (tr). These exhaust gases are then mixed and combusted with fresh gases in the Sy, modelled by a perfectly stirred reactor (PSR) operating within a set tr. These combined gases then flow into the DN, which is modelled by a plug flow reactor (PFR) that cools the gas to varying combustor exit temperatures within a constrained tr. Together, these form a simplified CRN model of a two-stage, dry-low emissions (DLE) combustion system. Using this CRN model, the impact of the tr distribution between the Py, Sy and DN is explored. A parametric study is conducted to determine how inlet pressure (Pin), inlet temperature (Tin), equivalence ratio (ϕ) and Py-Sy fuel split (FS), individually impact indicative CO turndown behaviour. Their coupling throughout engine load is then investigated using a model combustor, and its effect on CO turndown is explored. Thus, this aims to deduce the fundamental, chemically-driven parameters considered to be most important for identifying the optimal CO turndown of GT combustors. In this work, a parametric study and a model combustor study are presented. The parametric study consists of changing a single parameter at a time, to observe the independent effect of this change and determine its contribution to CO turndown behaviour. The model combustor study uses the same CRN, and varies the parameters simultaneously to mimic their change as an engine moves through its steady-state power curve. The latter study thus elucidates the difference in CO turndown behaviour when all operating conditions are coupled, as they are in practical engines. The results of this study aim to demonstrate the parameters that are key for optimising and improving CO turndown.

scholarly journals Study on Chlorinated Gas Adsorption Using Activated Carbon via Polyvinyl Chloride (PVC) Stepwise Pyrolysis Process

Proceedings ◽  
2018 ◽  
Vol 2 (20) ◽  
pp. 1314
Author(s):  
Patiparn Boonruam ◽  
Piyachat Wattanachai ◽  
Settakorn Upasen
Keyword(s):  
Activated Carbon ◽  
Polyvinyl Chloride ◽  
Adsorption Process ◽  
Gas Adsorption ◽  
Chloride Ion ◽  
Pyrolysis Process ◽  
Acid Base ◽  
Surface Areas ◽  
Acid Base Titration ◽  
Specific Surface Areas

In this research, we studied the chlorinated gas adsorption process using activated carbon. Two types of granular activated carbon were employed: GAC800 and GAC1200; with specific surface areas of 800 m2/g and 1200 m2/g, respectively. In order to optimize the polyvinyl chloride (PVC) dehydrochlorination conditions, three parameters were studied: (i) the type of precursor—PVC and PVC mixed with charcoal (1:1 by weight)—(ii) the temperature—300 and 400 °C—and (iii) the retention time—30, 120, and 240 min. Mohr’s method and acid-base titration were used to estimate the captured amount of chlorinated gas. The results indicated that the PVC dehydrochlorination occurred completely about 69–73 wt.% at 400 °C for 240 min. The amount of chloride ion was detected around 1–2 mmol/LNaOH. The estimated HCl adsorption capacity for the GAC800 and GAC1200 samples potentially absorbed 0.27 mgHCl/gGAC and 0.21 mgHCl/gGAC, respectively. In addition, the efficiency for GAC800 and GAC1200 was reported to 37.95% and 28.92%, respectively.

Preparation of chemically activated carbon from waste biomass by single-stage and two-stage pyrolysis

2017 ◽  
Vol 143 ◽  
pp. 643-653 ◽  
Author(s):  
Anton Zubrik ◽  
Marek Matik ◽  
Slavomír Hredzák ◽  
Michal Lovás ◽  
Zuzana Danková ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Single Stage ◽  
Waste Biomass ◽  
Two Stage

Production of a producer gas from woody waste via air gasification using activated carbon and a two-stage gasifier and characterization of tar

Fuel ◽  
2010 ◽  
Vol 89 (11) ◽  
pp. 3226-3234 ◽  
Author(s):  
Tae-Young Mun ◽  
Pyeong-Gi Seon ◽  
Joo-Sik Kim
Keyword(s):  
Activated Carbon ◽  
Producer Gas ◽  
Two Stage

Preparation and characterization of activated carbon derived from the Borassus flabellifer flower as an electrode material for supercapacitor applications

2017 ◽  
Vol 41 (10) ◽  
pp. 3939-3949 ◽  
Author(s):  
M. Sivachidambaram ◽  
J. Judith Vijaya ◽  
L. John Kennedy ◽  
R. Jothiramalingam ◽  
Hamad A. Al-Lohedan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Electrode Material ◽  
Two Stage ◽  
Precursor Material ◽  
Stage Process ◽  
Activating Agent ◽  
Supercapacitor Applications ◽  
Characterization Of Activated Carbon

Activated carbon is prepared by a two stage process with H3PO4 activating agent using the precursor material Borassus flabellifer flower as an electrode material for supercapacitors.

scholarly journals Upcycling brewer's spent grain waste into activated carbon and carbon nanotubes for energy and other applications via two‐stage activation

2019 ◽  
Vol 95 (1) ◽  
pp. 183-195 ◽  
Author(s):  
Ahmed I Osman ◽  
Edward O'Connor ◽  
Glenn McSpadden ◽  
Jehad K Abu‐Dahrieh ◽  
Charlie Farrell ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Two Stage ◽  
Brewer’S Spent Grain ◽  
Spent Grain
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