It looks like Big Oil, Coal and Nuclear will overshadow any attempts at mitigating climate change - thought these myths and facts about "clean" coal might be interesting.
Myths and facts of "clean coal" technologies
MYTH # 1 Efficient Combustion Technologies can increase efficiency and reduce emissions.
Supercritical Pulverised Coal Combustion (PCC) - uses high pressures and temperatures. This can increase the thermal efficiency of the plant from 35% to 45%. This reduces emissions as less coal is used. Fluidised Bed Coal Combustion (FBC) - allows coal combustion at relatively low temperatures, which reduces NOX formation. A sorbent is used to absorb sulphur. Coal gasification - coal is reacted with steam and air or oxygen under high temperatures and pressures to form syngas (mostly carbon monoxide and hydrogen). Syngas can be burnt to produce electricity or processed to produce fuels such as diesel oil.
FACTS:
The world standard for efficiency at a power plant using pulverised fuel technology, the most common technique, stands at 37.5%. Advanced pulverized fuel technology increases the average efficiency to just 41-44 percent with a forecast improvement to 50 percent in the next 100 years. Other clean coal combustion technologies are still in early stages of development and are unlikely to improve efficiency beyond 43%.
MYTH # 2 : Coal washing lowers the level of sulphur and minerals in the coal.
FACTS:
Coal washing results in the formation of large quantities of slurry. This is placed in waste piles. Rain drains through the piles, picking up pollutants which end up in rivers and streams. This runoff is acidic and contains heavy metals.
MYTH # 3 During combustion, “clean coal” technologies utilize pollution controls for existing power plants to reduce emissions of pollutants.
Particulate emissions – can be reduced by Electrostatic Precipitators (ESPs) and fabric filters. ESPs are most widely used. Flue gases are passed between collecting plates. These attract particles using an electrical charge. NOX emissions – can be reduced by Low-NOX Burners (LNB). These reduce the formation of NOX by controlling the flame temperature and the chemical environment in which the coal combusts. Selective Catalytic or Non-Catalytic Reduction (SCR/SNCR) are expensive and less widely used. SO2 emissions - can be reduced by Flue Gas Desulpurisation (FGD). Wet FGD, or wet scrubbing, is most common and absorbs SO2 using a sulphur absorbing chemical (sorbent), such as lime. Trace elements emissions – these include mercury, cadmium and arsenic. Some emissions can be reduced by particulate controls, fluidised bed combustion and FGD equipment. Activated Carbon Injection is being trialled to remove mercury.
FACTS:
Between 7 and 30 percent of coal consists of non-combustible material that just has to be eventually disposed of. “Clean coal” technologies attempt to trap these waste products before they leave the smokestalks; waste material that is trapped is then used (despite containing a number of toxic elements) or dumped as landfill.
The use of higher quality coal – lower in ash and sulphur should reduce emissions and increase efficiency, but thermal efficiency is increased by only one percent. If clean coal is used to meet the increased electricity demand predicitions of govenments instead of cleaner renewable alternatives, there will in fact be a net increase in carbon dioxide emissions.
According to a report by the United Nations Environment Programme (UNEP) mercury and its compounds are highly toxic and pose a ‘global environmental threat to humans and wildlife.’ Exposure to it has been associated with serious neurological and developmental damage to humans. The report also states that coal-fired power and heat production is the largest single source of atmospheric mercury emissions. According to the Coal Utilization Research Council ‘there are no commercial technologies available for mercury capture at coal-fuelled power plants’. Furthermore, a US Department of Energy commissioned report, states that the consistent, long-term performance of mercury control has yet to be demonstrated. Experimental removal of mercury is prohibitively expensive at $761,000/kg mercury removed and even then 10% of the mercury still remains...
Read the rest of the myths and facts about clean coal
Showing posts with label coal. Show all posts
Showing posts with label coal. Show all posts
Thursday, January 28, 2010
Wednesday, January 27, 2010
Obama: Climate Change and Renewables Take Backseat to "Clean" Coal, Nuclear Energy and Offshore Oil!
President Obama's State of the Union Address full text: Climate Change and Renewables Take Backseat to "Clean" Coal, Nuclear Energy and Offshore Oil!
For Immediate Release
January 27, 2010
Remarks by the President in State of the Union Address
9:11 P.M. EST
THE PRESIDENT: Madam Speaker, Vice President Biden, members of Congress, distinguished guests, and fellow Americans:
Our Constitution declares that from time to time, the President shall give to Congress information about the state of our union. For 220 years, our leaders have fulfilled this duty. They've done so during periods of prosperity and tranquility. And they've done so in the midst of war and depression; at moments of great strife and great struggle.
It's tempting to look back on these moments and assume that our progress was inevitable -– that America was always destined to succeed. But when the Union was turned back at Bull Run, and the Allies first landed at Omaha Beach, victory was very much in doubt. When the market crashed on Black Tuesday, and civil rights marchers were beaten on Bloody Sunday, the future was anything but certain. These were the times that tested the courage of our convictions, and the strength of our union. And despite all our divisions and disagreements, our hesitations and our fears, America prevailed because we chose to move forward as one nation, as one people.
Again, we are tested. And again, we must answer history's call.
One year ago, I took office amid two wars, an economy rocked by a severe recession, a financial system on the verge of collapse, and a government deeply in debt. Experts from across the political spectrum warned that if we did not act, we might face a second depression. So we acted -– immediately and aggressively. And one year later, the worst of the storm has passed.
But the devastation remains. One in 10 Americans still cannot find work. Many businesses have shuttered. Home values have declined. Small towns and rural communities have been hit especially hard. And for those who'd already known poverty, life has become that much harder.
This recession has also compounded the burdens that America's families have been dealing with for decades –- the burden of working harder and longer for less; of being unable to save enough to retire or help kids with college.
So I know the anxieties that are out there right now. They're not new. These struggles are the reason I ran for President. These struggles are what I've witnessed for years in places like Elkhart, Indiana; Galesburg, Illinois. I hear about them in the letters that I read each night. The toughest to read are those written by children -– asking why they have to move from their home, asking when their mom or dad will be able to go back to work.
For these Americans and so many others, change has not come fast enough. Some are frustrated; some are angry. They don't understand why it seems like bad behavior on Wall Street is rewarded, but hard work on Main Street isn't; or why Washington has been unable or unwilling to solve any of our problems. They're tired of the partisanship and the shouting and the pettiness. They know we can't afford it. Not now.
So we face big and difficult challenges. And what the American people hope -– what they deserve -– is for all of us, Democrats and Republicans, to work through our differences; to overcome the numbing weight of our politics. For while the people who sent us here have different backgrounds, different stories, different beliefs, the anxieties they face are the same. The aspirations they hold are shared: a job that pays the bills; a chance to get ahead; most of all, the ability to give their children a better life.
You know what else they share? They share a stubborn resilience in the face of adversity. After one of the most difficult years in our history, they remain busy building cars and teaching kids, starting businesses and going back to school. They're coaching Little League and helping their neighbors. One woman wrote to me and said, "We are strained but hopeful, struggling but encouraged."
It's because of this spirit -– this great decency and great strength -– that I have never been more hopeful about America's future than I am tonight. (Applause.) Despite our hardships, our union is strong. We do not give up. We do not quit. We do not allow fear or division to break our spirit. In this new decade, it's time the American people get a government that matches their decency; that embodies their strength. (Applause.)
And tonight, tonight I'd like to talk about how together we can deliver on that promise.
Read full text of President Obama's State of the Union address
For Immediate Release
January 27, 2010
Remarks by the President in State of the Union Address
9:11 P.M. EST
THE PRESIDENT: Madam Speaker, Vice President Biden, members of Congress, distinguished guests, and fellow Americans:
Our Constitution declares that from time to time, the President shall give to Congress information about the state of our union. For 220 years, our leaders have fulfilled this duty. They've done so during periods of prosperity and tranquility. And they've done so in the midst of war and depression; at moments of great strife and great struggle.
It's tempting to look back on these moments and assume that our progress was inevitable -– that America was always destined to succeed. But when the Union was turned back at Bull Run, and the Allies first landed at Omaha Beach, victory was very much in doubt. When the market crashed on Black Tuesday, and civil rights marchers were beaten on Bloody Sunday, the future was anything but certain. These were the times that tested the courage of our convictions, and the strength of our union. And despite all our divisions and disagreements, our hesitations and our fears, America prevailed because we chose to move forward as one nation, as one people.
Again, we are tested. And again, we must answer history's call.
One year ago, I took office amid two wars, an economy rocked by a severe recession, a financial system on the verge of collapse, and a government deeply in debt. Experts from across the political spectrum warned that if we did not act, we might face a second depression. So we acted -– immediately and aggressively. And one year later, the worst of the storm has passed.
But the devastation remains. One in 10 Americans still cannot find work. Many businesses have shuttered. Home values have declined. Small towns and rural communities have been hit especially hard. And for those who'd already known poverty, life has become that much harder.
This recession has also compounded the burdens that America's families have been dealing with for decades –- the burden of working harder and longer for less; of being unable to save enough to retire or help kids with college.
So I know the anxieties that are out there right now. They're not new. These struggles are the reason I ran for President. These struggles are what I've witnessed for years in places like Elkhart, Indiana; Galesburg, Illinois. I hear about them in the letters that I read each night. The toughest to read are those written by children -– asking why they have to move from their home, asking when their mom or dad will be able to go back to work.
For these Americans and so many others, change has not come fast enough. Some are frustrated; some are angry. They don't understand why it seems like bad behavior on Wall Street is rewarded, but hard work on Main Street isn't; or why Washington has been unable or unwilling to solve any of our problems. They're tired of the partisanship and the shouting and the pettiness. They know we can't afford it. Not now.
So we face big and difficult challenges. And what the American people hope -– what they deserve -– is for all of us, Democrats and Republicans, to work through our differences; to overcome the numbing weight of our politics. For while the people who sent us here have different backgrounds, different stories, different beliefs, the anxieties they face are the same. The aspirations they hold are shared: a job that pays the bills; a chance to get ahead; most of all, the ability to give their children a better life.
You know what else they share? They share a stubborn resilience in the face of adversity. After one of the most difficult years in our history, they remain busy building cars and teaching kids, starting businesses and going back to school. They're coaching Little League and helping their neighbors. One woman wrote to me and said, "We are strained but hopeful, struggling but encouraged."
It's because of this spirit -– this great decency and great strength -– that I have never been more hopeful about America's future than I am tonight. (Applause.) Despite our hardships, our union is strong. We do not give up. We do not quit. We do not allow fear or division to break our spirit. In this new decade, it's time the American people get a government that matches their decency; that embodies their strength. (Applause.)
And tonight, tonight I'd like to talk about how together we can deliver on that promise.
Read full text of President Obama's State of the Union address
Sunday, January 24, 2010
Will You Be a Victim of Killer Coal?
That's the diagnosis that Physicians for Social Responsibility (PSR) relayed to the public in a comprehensive medical study released on November 18, 2009, called "Coal's Assault on Human Health." In it, the organization, comprised of physicians and public health experts, claimed that coal pollutants damage every major organ in the human body and contribute to four of the top five leading causes of death in the United States.
"The findings of this report are clear: while the U.S. relies heavily on coal for its energy needs, the consequences of that reliance for our health are grave," said Dr. Alan H. Lockwood, a principal author of the report and a professor of neurology at the University at Buffalo.
It is not simply about cleaning up the coal process; it is about halting its production altogether in order to immediately save lives - an estimated 24,000 every single year.
At every stage in its life cycle, coal can negatively impact human health, from mining operations, cleaning, transportation to burning and disposing of the combustion waste. PSR reported that many Americans are being affected daily by coal and the exposure is contributing to horrible health problems; heart attacks, lung cancer, strokes and asthma, among others.
Recently, CoalSwarm*, an environmental group that monitors coal issues, released a list of 126 coal-fired power plants that are surrounded by 10,000 people or more living within a three-mile radius. Most of these hundreds of thousands of Americans are being exposed to deadly coal particulates without even knowing it.
Not since NASA's James Hansen rang the global warming alarm about coal's major contribution to climate change has there been a more dire call to shut down coal operations in the United States.
The majority of the plants are not equipped with the most up-to-date sulfur dioxide reduction equipment, which contributes to lung and heart disease. However, instead of upgrading this technology on coal burners, which can cost hundreds of millions of dollars, a growing number of activists are pushing for facilities to be closed instead, for the upgrades are essentially prolonging the life of plants that are still polluting in many other ways.
Read entire article and download the report
"The findings of this report are clear: while the U.S. relies heavily on coal for its energy needs, the consequences of that reliance for our health are grave," said Dr. Alan H. Lockwood, a principal author of the report and a professor of neurology at the University at Buffalo.
It is not simply about cleaning up the coal process; it is about halting its production altogether in order to immediately save lives - an estimated 24,000 every single year.
At every stage in its life cycle, coal can negatively impact human health, from mining operations, cleaning, transportation to burning and disposing of the combustion waste. PSR reported that many Americans are being affected daily by coal and the exposure is contributing to horrible health problems; heart attacks, lung cancer, strokes and asthma, among others.
Recently, CoalSwarm*, an environmental group that monitors coal issues, released a list of 126 coal-fired power plants that are surrounded by 10,000 people or more living within a three-mile radius. Most of these hundreds of thousands of Americans are being exposed to deadly coal particulates without even knowing it.
Not since NASA's James Hansen rang the global warming alarm about coal's major contribution to climate change has there been a more dire call to shut down coal operations in the United States.
The majority of the plants are not equipped with the most up-to-date sulfur dioxide reduction equipment, which contributes to lung and heart disease. However, instead of upgrading this technology on coal burners, which can cost hundreds of millions of dollars, a growing number of activists are pushing for facilities to be closed instead, for the upgrades are essentially prolonging the life of plants that are still polluting in many other ways.
Read entire article and download the report
Coal's Assault on Human Health
Physicians for Social Responsibility has released a groundbreaking medical report, “Coal’s Assault on Human Health,” which takes a new look at the devastating impacts of coal on the human body. Coal combustion releases mercury, particulate matter, nitrogen oxides, sulfur dioxide, and dozens of other substances known to be hazardous to human health. This report looks at the cumulative harm inflicted by those pollutants on three major body organ systems: the respiratory system, the cardiovascular system, and the nervous system. The report also considers coal’s contribution to global warming, and the health implications of global warming.
Read and download Coal's Assault on Human Health
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