Results 61 to 70 of about 97,689 (295)

Thermal Calculations for Co‐Firing of Hydrogen/Ammonia and Coal in 660‐MW Coal‐Fired Boilers

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT To achieve a clean energy transition under the dual carbon goals, blending hydrogen/ammonia into pulverized coal boilers represents a key technological pathway. Different hydrogen/ammonia co‐firing ratios (5%–50%) are investigated for their impact on the thermodynamic characteristics of 660‐MW supercritical boiler at 100% and 20% boiler ...
Yaodong Da, Nana Hou, Weipeng Wang, Yongqiang Chang, Xin Liu, Feng Pan, Defu Che, Lei Deng   +7 more
wiley   +1 more source

Longitudinal transformation of nitrogen and carbon in the hyporheic zone of an N-rich stream: A combined modelling and field study [PDF]

, 2011
A combined modelling and field study approach was used to examine biogeochemical functioning of the hyporheic zone in two gravel bars in an N-rich fourth-order stream (River Hers, south-west France).
Delmotte, Sébastien, Gérino, Magali, Namour, Philippe, Peyrard, Dimitri, Sanchez-Pérez, José Miguel, Simeoni-Sauvage, Sabine, Vervier, Philippe   +6 more
core   +2 more sources

AEROBIC DENITRIFICATION

Annals of Applied Biology, 1940
DENITRIFICAITION is the reduction of nitrates to gaseous nitrogen, sometimes mixed with oxides of nitrogen: it is the only process which certainly causes a loss of nitrogen in nature, because the nitrogen gas escapes into the atmosphere. It is known that nitrite certainly, and probably hyponitrite, are formed as intermediates in the course of the ...
openaire   +1 more source

Precipitation of niobic acid from potassium niobate in sulphuric acid solution: A route to niobium oxide

The Canadian Journal of Chemical Engineering, EarlyView.
Graphical abstract illustrating the niobic acid precipitation process applied and the product obtained. Abstract This study investigates the precipitation of niobic acid (Nb2O5.nH2O) from potassium niobate solution with addition of sulphuric acid, and its subsequent thermal conversion into niobium oxide (Nb2O5). Thermodynamic modelling with PHREEQC and
Cássia R. Souza, Gabriela C. Silva, Isabel P. Silva, Frederico M. Penha, Sônia D. F. Rocha   +4 more
wiley   +1 more source

Nitrogen retention in the riparian zone of watersheds underlain by discontinuous permafrost [PDF]

, 2005
Thesis (M.S.) University of Alaska Fairbanks, 2005Riparian zones function as important ecotones for reducing nitrate concentration in groundwater and inputs into streams.
O'Donnell, Jonathan A.
core  

Coupled anoxic nitrification/manganese reduction in marine sediments [PDF]

, 1999
Pore water and solid phase distributions of oxygen, manganese, and nitrogen from hemipelagic and shelf sediments sometimes indicate a close coupling between the manganese and nitrogen redox cycles.
Aller, Robert Curwood, Gilbert, Franck, Hulth, Stefan   +2 more
core   +4 more sources

Insight Into the Origins of N2O Byproduct on Confinement Structure TiO2/MnSm Catalyst Through Sulfation Pre‐Treatment for Low‐Temperature NH3‐SCR Reaction

EcoEnergy, EarlyView.
Sulfation of TiO2 with tubular architecture assembly nanosheets cooperated with Sm modification endowed the TiO2–SO42−/MnSm catalyst with excellent low‐temperature NH3‐SCR activity, high N2 selectivity, and well H2O‐resistance. It clarifies how the Sm modification and sulfation adjusts the distribution of acid sites and modulates the activation of NH3 ...
Tian Zhao, Guodong Zhang, Xiaosheng Huang, Rongji Cui, Chao Feng, Zhicheng Tang   +5 more
wiley   +1 more source

Study on nitrogen removal in mixotrophic denitrification system driven by composite filter materials

Gongye shui chuli
NH4+-N in refinery wastewater is completely converted into NO3--N after biochemical treatment, resulting in extremely low C/N ratio in the effluent. The traditional heterotrophic denitrification processes require external carbon sources, which leads to ...
CHENG Binbin, SONG Yanke, WANG Qinghong, SONG Haigang, CHEN Chunmao, LI Jin, LIU Zhichang   +6 more
doaj   +1 more source

Insights to Industrial Electrocatalytic Sulfide Oxidation: Electrode Fabrication, System Engineering, and High‐Value Product Acquisition

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This review summarizes recent advances in electrocatalytic sulfide oxidation (SOR), focusing on catalyst design strategies, reaction system engineering, and pathways for high‐value product generation. The roles of different reduced sulfur species (S2−, HS−, H2S) under various industrial conditions are highlighted, along with approaches to enhance ...
Zhongyuan Wang, Yinxi Han, Yufei Zhang, Jinghuan Chen, Jiade Wang   +4 more
wiley   +1 more source

Autotrophic Denitrification for Nitrate Removal from Groundwater with an Integrated Microbial Fuel Cells (MFCs)-microbial Electrolysis Cell (MEC) System

International Journal of Electrochemical Science, 2021
Bioelectrochemical system (BES) that is self-sufficient was developed to treat nitrate in groundwater, which consists of air cathode microbial fuel cell (MFC) and microbial electrolysis cell (MEC). Without external power, the highest nitrate removal rate
Chengye Wang, Yue Wu, Wei Hu, Yan Li
doaj   +1 more source